Modern techs in the HVAC industry need to access the right information and resources as quickly as possible when out in the field. But choosing the right app depends on several factors:
The size of your team
Your HVAC business size and scaling goals
The features that you actually need and will use
The software’s ease of use
Your budget
If you have a small business with one or two HVAC techs and aren’t looking to scale, free or low-cost apps may be sufficient. However, if you plan to grow your HVAC business and maintain customer satisfaction and operational efficiency, an all-in-one field service management solution like ServiceTitan — offering streamlined workflows such as call booking and dispatching, with mobile access for your techs — might be a better fit.
We’ve compiled a list of the 23 best HVAC apps for on-the-go HVAC technicians, starting with a walk-through of our own, ServiceTitan. Our list includes apps for basic tasks like calculating refrigerant charge and others that assist HVAC techs with more complex jobs, such as troubleshooting equipment issues and invoicing.
Best HVAC Apps in 2025
Book a free demo to see how ServiceTitan can boost the efficiency of your HVAC business.
1. ServiceTitan: Best All-in-One HVAC App
ServiceTitan is one of the leading all-in-one software solutions for the home service industry. Our mobile app gives HVAC contractors (and other home services businesses such as plumbers and electricians) the agility to work from any location and sync entire workflows with other team members (like CSRs and dispatchers) and HVAC business owners based in the office.
ServiceTitan Mobile replaces a whole range of paper-based processes because all customer documents — invoices, estimates, memberships, contracts, etc. — are uploaded to the cloud. It's intuitive to use and easy for techs (and the main office) to keep track of these important documents and access them on any device.
By giving your HVAC techs ServiceTitan’s full range of software tools on a mobile device, you can:
Access all customer information collected by CSRs (job histories, equipment information, call recordings, and more).
Build instant digital estimates with accurate pricing and product information that customers can approve on the spot.
Offer financing options so that jobs can be closed more quickly.
Maximize upselling opportunities such as maintenance contracts that bring in more revenue.
Create invoices and take payments directly from customers so you get paid faster.
Sign-off timesheets remotely in real-time so payroll is accurate and prompt.
We’ll walk through these features next.
Access to Customer Information & Job History
With the ServiceTitan Mobile app, HVAC technicians can access all the details your CSRs collected during the call booking process from anywhere (contact details, job history, outstanding estimates, service history, prior invoices, notes, and more).
No more pieces of paper with scribbled information, no more repeated calls between CSRs and techs to check on job details, and an instantly more efficient way of organizing work orders and customer information. They can even listen to a recording of the call without ever having to call the CSR who made the booking.
This means that your techs arrive at every job fully informed and aware of the services previously performed and can discuss them with the customer in detail. This level of knowledge and attention to customer service gives customers additional confidence in the tech assigned to do the work.
Build Estimates with Just a Few Taps
With ServiceTitan, HVAC businesses can set up a dynamic flat-rate pricebook that’s updated across all devices and systems so you and your team can build accurate estimates that bring in profit.
Pricebook Pro, available on both ServiceTitan Mobile and in the office, comes loaded with curated content, detailed descriptions and vivid images already built in. Pricebook Pro also includes an “Upgrades and Recommendations” feature that shows customers good, better and best options, along with recommendations for required parts.
Using ServiceTitan Mobile, HVAC techs can create Good-Better-Best proposals that show customers high-quality images of all products, and provide explainer videos and detailed product information on-site.
Once a customer selects their option, ServiceTitan connects the estimate to the rest of the HVAC workflow, including scheduling, dispatching, and billing.
Offer Financing Options
ServiceTitan’s integrated financing feature helps your techs win more customers by offering flexible financing options while they’re out on a service call.
You control which plans you offer and set the rules to suit your service business. Once you’ve built your estimate, ServiceTitan automatically calculates the options, based on your choices, so that financing can be offered directly from your mobile device.
The ability to offer flexible financing options on the spot gives customers instant access to funds and increases the likelihood of techs closing bigger jobs and boosting sales.
Maximize Upselling Opportunities
The ServiceTitan Mobile app gives your HVAC techs the tools to upsell maintenance contracts or close an outstanding estimate on all service calls.
HVAC techs can use pre-approved maintenance agreement templates, present them to the customer, and get them signed while on a job.
HVAC service businesses can create templates from scratch or modify existing agreements to better suit their needs. They can store multiple templates for different membership types and customize them with details such as membership duration, frequency, billing information, and pricing.
Without this in-app information, it’s a challenge to figure out which customers would benefit from a maintenance contract, which already have one, and manage those agreements (when they need servicing or renewing). Techs can easily forget or ignore upselling opportunities. But when the tech has access to all the customer information we outlined above, they can follow up on any open estimates and close more jobs.
Close Sales at the Job Site
Collecting revenue as quickly as possible is crucial for keeping cash flow running smoothly. To do that, you need efficient and reliable billing procedures that integrate with your other operational processes and don’t take up techs’ time pulling together paperwork manually.
With ServiceTitan’s free Invoice Generator tool, HVAC techs can generate invoices while they’re on site, and take payments as soon as the work is completed. Capture check and credit card payments via the tablet’s in-built camera (and card payments by swiper). You don’t need to wait days for payments to clear, or chase customers down for payment after the tech has left the premises.
Note: If you already use accounting software, ServiceTitan’s invoicing software can be integrated with QuickBooks to ensure all your financials are accurate, up-to-date and easy to access. We also cover this below in our QuickBooks app section.
Sign Off Timesheets Remotely
Instead of using a stand-alone timesheet app, ServiceTitan’s payroll software has been designed to help you track staff (via timesheets), and pay them on time.
Our timesheet feature helps you manage productivity by monitoring time spent on specific activities, such as driving and collecting materials, as well as time spent on actual HVAC services.
Because ServiceTitan features are fully integrated, HVAC techs can access their timesheets for sign-off via their mobile device, so there’s no need to drive in to the head office each payroll period. You can even configure the software to apply confidential commission and bonus structures so that complex performance pay is all automated.
These systems not only streamline your payroll procedure, but your HVAC staff will be confident that they will always be paid correctly and promptly.
ServiceTitan Mobile syncs seamlessly with office operations, allowing team members to access integrated, real-time features from the office or field.
ServiceTitan HVAC software’s core features include:
You can read more information in these articles:
ServiceTitan: 8 Bonus Free Tools
These are not separate apps, but ServiceTitan also offers the following free tools that are available to anyone, with or without a ServiceTitan account:
Bonus Tool 1: ServiceTitan’s HVAC Load Calculator
ServiceTitan’s HVAC Load Calculator is an easy-to-use online calc tool that quickly gauges the BTU range for any particular dwelling. By factoring in the interior square footage, number of windows, and even your region’s climate, you can determine the HVAC system required.
Bonus Tool 2: ServiceTitan’s SEER Energy Savings Calculator
Use ServiceTitan’s free SEER Energy Savings Calculator to give customers a visual demonstration of how much they can save on their energy bills with a newly installed HVAC system.
Bonus Tool 3: ServiceTitan’s HVAC Duct Calculator
Want to know the size of the duct by airflow or by dimensions? ServiceTitan’s HVAC Duct Calculator lets you quickly size a range of duct sizes or focus on one HVAC duct system.
Our HVAC duct sizer has various modes that allow you to input multiple parameters to find sizes that fall within the friction loss bounds.
Bonus Tool 4: ServiceTitan’s HVAC CFM Calculator
Our HVAC CFM Calculator helps you determine the required airflow rate for every room based on a cubic feet per minute measurement of volume flow and the number of air changes per hour (ACH) needed for proper ventilation.
Bonus Tool 5: Service Titan’s Refrigeration BTU Calculator
ServiceTitan’s refrigeration BTU calculator helps you determine your needs for a new walk-in cooler or freezer, or to troubleshoot issues with existing refrigeration equipment. Enter your walk-in cooler or freezer dimensions, temperatures, and performance factors and the refrigeration BTU calculator will estimate the system specifications you need.
Bonus Tool 6: ServiceTitan’s HVAC Labor Rate Calculator
Use ServiceTitan’s free HVAC Labor Rate Calculator to calculate how much it costs your company to employ HVAC technicians. Insert key metrics into our tool to come up with a reliable hourly labor rate to charge, which is guaranteed to cover all your business costs and maximize profitability.
Bonus Tool 7: ServiceTitan’s HVAC Business Valuation Generator
This interactive calculator offers business operators a snapshot of their HVAC company’s monetary value.
Business owners input their company’s assets, revenue, number of employees, expenses, industry and state to offer a projected valuation. You don’t need a ServiceTitan account to use this tool, and it's completely free to calculate the value of your business.
Bonus Tool 8: ServiceTitan’s Invoice Generator
As mentioned above, HVAC technicians can quickly and easily generate invoices from any smartphone or tablet with ServiceTitan’s free Invoice Generator.
Learn more about how to keep company tablets and mobiles secure in this post and how to manage a mobile workforce here. Read our article on best HVAC tools here.
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2. Bluon HVAC: Best HVAC Resource App
The Bluon app provides a huge resource of HVAC equipment information for HVAC contractors. Users can access its online database of 200 HVAC brands, 450,000 core models (most with manuals), and 5 million parts.
The app also has a “Master Mechanic” AI tool trained with over 50,000 unique problem-solution sets that can guide service technicians through most HVAC jobs from start to finish with 99% accuracy. Users with further queries can call Bluon’s live support line and speak to a veteran HVAC tech to get detailed troubleshooting instructions. The company claims that 92% of callers give this service a 5-star review.
3. CE HVAC Pro+: Great for Carrier Enterprise Product Users
If you work with CE (Carrier Enterprise) products, you’ll find this HVAC service app to be particularly handy.
You can easily check warranty entitlement, order status, manuals, and tech specs for all the CE HVAC models and use the inventory management tool, EastStock, to check stock availability.
The app also offers video and text technical support from its expert technical agents, a PT (pressure-temperature) calculator, superheat calculator, and duct calculator.
Online reviewers of the app laud its user-friendliness and ease of looking up parts, along with its overall convenience.
4. CompanyCam: Best Camera App for HVAC Techs
CompanyCam is an innovative app built for contractors that lets you photograph every part of your project via your phone. You can take unlimited photos, annotate them with arrows, comments, and tags, and organize them by project and share them with your team and customers instantly.
All photos are location- and time-stamped, which is a useful feature if an issue comes up, and stored securely in the CompanyCam cloud.
5. CoolCloud HVAC: Best App for Connectivity
The CoolCloud HVAC app is quite different from the other apps listed here. Brought to you by Goodman Manufacturing Co., L.P., this app allows you to connect and communicate via Bluetooth with Goodman and Amana air handlers and furnace control boards.
This solution gives you remote, real-time information that will allow you to service and maintain customer equipment faster and better. Between configuration adjustments and diagnostic tests, CoolCloud HVAC helps techs ensure the equipment’s energy efficiency and overall performance.
6. Danfoss Troubleshooter: Great Troubleshooter App
Troubleshooter helps you diagnose and resolve issues in HVACR systems. The app’s user-friendly interface lets you check on specific parts of a system and search through the most common symptoms. Once you’ve identified the problem, Troubleshooter recommends possible solutions.
You can also download Troubleshooter’s database, so you can use it with or without an internet connection, which is useful when service techs are working in locations with poor connectivity.
Troubleshooter is part of Ref Tools, the all-in-one mobile app for air conditioning and refrigeration technicians.
7. Duct Calculator Elite: Best Duct Calculator App
Duct Calculator Elite is a useful calculator app designed to calculate duct size, velocity, pressure drop, and flow rate for ductwork.
The app lets you enter information precisely (with no awkward slider control) and offers HVAC techs a variety of settings, including duct dimensional units, airflow units, velocity units, duct material, elevation, and more, so calculations can be customized for accurate results.
Reviews are generally positive for this app with users appreciating its ease of use and precision.
8. Gemaire HVAC Pro+: Best App for Gemaire Users
This app was created by Gemaire, one of the biggest HVAC distributors of heating, cooling, and refrigeration products in the U.S. The Gemaire mobile app gives HVAC technicians ready-to-use product information and tools right on their phone.
This innovative HVAC app offers a sign-in feature with Face or Touch ID for a personal online account, so you don’t need to remember a password when you’re in the field or with a customer. The HVAC service app also lets techs see availability for nearby branches in real time, as well as up-to-the-minute status updates on arrival times for all HVAC equipment orders.
Filter for — and check availability on — the exact model and parts you need for the job.
Search by system needs inside the app to find AHRI-matched systems with up-to-date inventory listings and pricing. The best feature of this app is the extensive database, which contains spec sheets, wiring diagrams, installation guides, and consumer literature for all Gemaire products.
9. HVAC Buddy: Best Deluxe HVAC Charging App
iOS – $9.99
HVAC Buddy is an HVAC troubleshooting app that’s highly rated for making HVAC work easier with its refrigerant charging and diagnostic capabilities.
When you enter the refrigerant type, temperatures, and pressures, HVAC Buddy displays the “target, actual, and difference” for superheat, subcooling, and airflow. Send those numbers in an email with a personalized “System Status Report” for all of your service calls.
This HVAC service app won’t leave you hanging when it comes to airflow, either. It compares the targeted difference across the coil versus the actual (Delta-T or Target Evaporator Exit Temperature - a.k.a TEET). It even offers a line chart, which displays historical values based on input changes or elapsed time. With real-time output for updated values and flexible units (psi, kPa, Fahrenheit, Celsius), HVAC Buddy is the heavyweight champion when it comes to HVAC jobs.
10. HVACR Check & Charge: Best Simple HVAC Charging App
Need a straightforward, on-the-job refrigerant charge calculator? From Emerson Climate Technologies, HVACR Check & Charge is a free and convenient mobile HVAC charging app that allows you to quickly calculate the right system refrigerant charge.
HVAC Check & Charge can be used for the following refrigerants:
R-22
R-410A
R-32
R-407C
R-134a
R-452B
R-454B
R-438
Choose from the subcooling, superheat, or airflow calculators and enter the system temperature — plus the sensible load and latent load. Based on this information, this HVAC app determines the proper system charge and whether you need to make any other alterations based on the conditions.
This HVAC service app also offers imperial and metric support.
11. HVACR Fault Finder: Best Compressor Troubleshooting App
Need help doing some on-site compressor troubleshooting? Look no further than the HVACR Fault Finder. This HVAC troubleshooting app allows you to problem-solve compressor electronic system failures for all of your air conditioning and refrigeration jobs with ease.
You can choose to enter a flashing “alert” code or use the “tap” feature to identify the code from the electronic module. This code gives you access to its interactive troubleshooting guide. Browse the guide for a comprehensive treasure chest of troubleshooting “tips and tricks,” plus visual flowcharts that create a clear-solution path for diagnosing system errors. HVAC Fault Finder also gives you electronic product manuals and videos to aid in your problem-solving hunt. Leveraging CoreSense technology, HVAC Fault Finder is a hands-down winner in the HVAC app arena.
12. HVAC Load Plus: Best Block Load Calculator App
The HVAC Load Plus iOS app allows you to perform detailed heating and cooling block loads for small commercial and residential buildings out in the field by taking advantage of the simplicity and power of the iPhone.
It performs heating and cooling block load calculations based upon industry standard calculation methods.
The app has a ton of features, including:
A 1,000+ world-wide city weather database
Data for 100s of construction types for walls, roofs, floors, doors, windows, skylights, ceilings, and more
The ability to create and store an unlimited number of projects
The ability to specify an unlimited number of opaque types (doors, walls, roofs, floors, ceilings), window types, and skylight types for each building
The ability to input your company information to display on the emailed report
The Android app (HVAC Quick Load) is more basic than the Apple app store version.
13. HVAC Practice Test: Best HVAC Knowledge Testing App
One of the best HVAC educational tools around, techs can answer thousands of questions about up-to-date HVAC trends, track their progress and familiarize themselves with the latest ideas and terminology with this HVAC service app.
The app offers tests with more than 2,000 different questions written by expert HVAC tutors. Its in-app analytics enable users to track strengths and weaknesses, and it offers detailed progress statistics for every question.
Whether you want to test yourself to stay on the cutting edge of the HVAC trade or test new techs on their knowledge, you’ll find plenty of use for this app.
14. HVAC Refrigerant PT: Best Refrigerant Information App
The HVAC Refrigerant PT app offers readily accessible refrigerant information — from bubble and dew pressures to a full pressure/temperature (PT) chart. This HVAC app includes information for 39 different refrigerants. It also allows users to customize its settings to include refrigerant type, temperature (°F or °C), and seven different units of pressure.
With just a few taps, you can access information on classification, density, critical temps and pressures, ozone depletion potential, safety ratings, applications, and recommended lubricants. No matter where you’re working, use HVAC Refrigerant PT for quick refrigerant referencing.
15. HVAC School: Best HVAC Trade School App
Whether you’re an aspiring technician or current student of the trades, the HVAC School app is a no-brainer for novices. This amazing little HVAC service app contains an entire library of information to guide you through trade school. The app even reminds you of things you may have forgotten along the way — because let’s be real — this isn't just a trade, it's a science!
Listen to the HVAC School podcast — a key source of industry knowledge and anecdotes of what it means to be an HVAC tech.
Read articles from industry pros on major topics to keep your HVAC literacy sharp.
Punch in common equations you’d find in the field to build familiarity and deeper understanding of HVAC mathematics with an integrated calculator. It’s like a portable, personal HVAC tutor that doesn’t cost a thing!
16. HyTools: Best Hydronic Calculator App
Brought to you by the expert in hydronic distribution systems and room temperature control, IMI Hydronic Engineering International created HyTools as a hydronic calculator app specifically designed for HVAC professionals.
This HVAC service app offers streamlined calculations and conversions for professionals who specialize in radiant heating and cooling systems.
Some of its standout features include:
Pressure maintenance and vacuum degassing calculation with selection for heating, cooling, and solar systems
Dirt and air separator pressure drop calculation
Valve sizing and presetting
Radiator power estimation (panel and column)
Radiator valve sizing and presetting
Pipe sizing
17. Bubble Level: Best Spirit Level App
These may be two different HVAC apps, but they perform the same function. Each app is able to determine the horizontal or vertical alignment of a given surface. Essentially, these apps act as a replacement for a physical bubble or spirit level by utilizing the gyroscope in your phone to calculate the tilt angle along three different axes.
While iOS devices (iPhones) are generally calibrated correctly, Android devices come from multiple manufacturers and might not be as reliable.
Fortunately, the Android app includes the ability to manually recalibrate your device by placing it face-up on a flat surface and pressing the SET button. There’s also a RESET button to return to the default factory calibration at any time.
18. iManifold: Great for Calculating System Performance
The iManifold app allows HVAC techs to perform jobs with greater accuracy and superior efficiency. As described by iManifold, the HVAC service app “calculates HVAC/R system performance and troubleshoots system problems through user inputs and dynamic, live system data."
Choose from more than 40 refrigerants and equipment profiling options. This HVAC troubleshooting app comes equipped with live annualized savings analysis and BTUH (British thermal units per hour) breakdown on the gauge screen.
19. MeasureQuick HVAC: Best System Diagnostic App
The MeasureQuick HVAC app lets users diagnose system problems from the most basic to the most complex. The app calculates and documents equipment performance and efficiency and saves these measurements.
This HVAC app’s powerful data aggregation tools, coupled with just-in-time education, helps increase a tech's ability to solve problems on the job site, which in turn, helps increase productivity.
HVAC technicians can store, view and retrieve job information, equipment specs, and system information in the app’s cloud storage facility and use this to ensure all HVAC workflows are completed correctly.
One reviewer says, “This works best after you’ve done your job and are just checking everything one last time to make sure you didn’t forget anything.”
20. Plumbing Formulator: Best App for Solving HVAC Equations
iOS – Free
Plumbing Formulator helps plumbers and HVAC technicians solve complex equations in the field, such as calculating appropriate pipe sizes, determining water flow and pressure, or maximizing pump efficiency. The app makes this process a whole lot easier with more than 120 standard formulas that you can easily check within the app.
The app also includes a number of great “quality-of-life” features — such as the ability to email and print specific formulas for easier reference. It also prominently displays your most frequently used formulas on the app for future use, as well as handy graphical charts to illustrate concepts clearly.
With Plumbing Formulator, your HVAC techs can stop wasting valuable time searching online for each individual solution while in the field.
21. QuickBooks: Best Accounting App for HVAC
QuickBooks is one of the best business apps for service companies, including the HVAC industry. From viewing net profit to tracking miles and managing financial reports and cash flow, it’s a one-stop shop in the app world.
Google Play reviewers tout the app’s real-time expense tracking and its ability to save detailed notes while your HVAC technicians produce estimates. The app also helps techs manage payments, track sales and customers, view account balances and more.
Like most QuickBooks software, you’ll need to set up a subscription once you’ve completed a 14-day trial.
Note: ServiceTitan integrates with multiple types of accounting software, such as QuickBooks and Sage Intacct so it can easily be connected to your existing office systems.
22. Ref Tools by Danfoss: Great A/C & Refrigerant Toolkit
The Danfoss Group — a leading manufacturer and service provider for refrigeration, air conditioning, heating, and more — applied its innovative engineering solutions to this HVAC app, which is a collection of useful, day-to-day air conditioning and refrigeration tools and converters, including:
Refrigerant Slider: Quickly calculate pressure/temperature ratios and find essential information on over 80 refrigerants.
Magnetic Tool: Test and troubleshoot solenoid valve coils quickly and easily.
Troubleshooter: See our separate summary above.
Product Finder: Extensive product-related data in one place. Search by product code number or product category to access and share product specifications, documentation, visuals, and more.
Spare Parts: Access and order an extensive list of Danfoss spare parts.
Low-GWP Tool: Find and compare climate-friendly refrigerants for retrofitting by checking compatibility with the TXV.
TXV Superheat Tuner: Optimize superheat in less than 15 minutes. Using advanced algorithms, TXV Superheat Tuner provides valve-specific adjustment recommendations.
With Ref Tools, you can also listen to topical podcasts while you work, including the popular Chilling with Jens podcast, available directly in the app.
23. Toggl Track: Best Time-Tracking App
iOS – Free for up to 5 users, subscriptions from $9 per month
Android – Free for up to 5 users, subscriptions from $9 per month
Toggl Track is a time-tracking app that helps you track how your HVAC techs are spending their time across desktop and mobile devices. The app integrates with Google and Outlook calendars and runs quietly in the background and syncs activity between devices.
The app lets you generate time-tracking reports so you can calculate the billable hours of your team. You can automatically round times up or down to the interval of your choice and keep track of productivity whenever you want by scheduling reports to be delivered to your inbox.
Schedule a free demo to discover how ServiceTitan can streamline your HVAC business operations.
ServiceTitan HVAC Software
ServiceTitan is a comprehensive HVAC business software solution built specifically to help service companies streamline their operations, boost revenue, and achieve growth. Our award-winning, cloud-based platform is trusted by more than 100,000+ contractors across the country.
