20 Best HVAC Apps for Service Techs in 2024

Mike Persinger
October 26th, 2023
16 Min Read

Modern HVAC techs need more than a clipboard and a book of carbon invoices to run their business. Continuing to rely on reference books to make vital calculations out in the field slows service down and can make techs look inefficient. As a modern-day tech in the HVAC industry, your job depends on your ability to reference the right information and resources as quickly as possible when you’re assisting customers in the field. With the right set of HVAC service apps, you can access the information you need with a tap on your smartphone or tablet. To keep you as efficient as possible, while providing a great service to your customers, we’ve compiled a list of the best 20 HVAC apps for on-the-go technicians. Our list is divided into three categories of HVAC apps: Business Apps, Calculator Apps, and Utility Apps. We’ll start with our own field services business app, ServiceTitan Mobile.

HVAC Business Apps

1. ServiceTitan® Mobile


3. CoolCloud HVAC

4. Carrier Enterprise HVAC Assist

5. ServiceTitan Invoice Generator

6. ServiceTitan Labor Rate Calculator

HVAC Calculator Apps

7. ServiceTitan’s HVAC Load Calculator

8. HVAC Buddy

9. HVAC Refrigerant PT

10. HVAC Fault Finder

11. HVAC School

12. HVAC Practice Test

13. HVAC Check & Charge

14. iManifold

15. Ref Tools by Danfoss

16. HyTools

HVAC Utility Apps

17. ServiceTitan’s HVAC Duct Calculator

18. iHandy Level

19. CompanyCam

20. ServiceTitan’s SEER Energy Savings Calculator

» Want to see how ServiceTitan helps you run your business more efficiently? Schedule a call with us to learn more about how our software, and accompanying mobile app, can help you grow your HVAC business.

HVAC Business Apps

1. ServiceTitan® Mobile

ServiceTitan® Mobile is the official mobile app of the ServiceTitan platform. You can leverage all the power of our technology to manage your business straight from your tablet while you’re with customers in the field. By giving your HVAC techs ServiceTitan’s full range of software tools on a tablet, you can: 

Help techs arrive fully informed.

ServiceTitan Mobile gives your techs direct access to every piece of information your Customer Service Rep (CSR) collected when the customer called. They can see customer names, addresses, contact details, outstanding estimates, and even listen to a recording of the customer’s call. No more pieces of paper with scribbled down 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.

Review a detailed job history.

Make sure your techs recognize and greet your regular customers by providing them with a detailed job history for each account. By using ServiceTitan Mobile, your HVAC techs can see:

  • Customer profiles

  • A list of previous jobs provided

  • Prior invoices

  • Photos

  • Voice notes

  • And more…

Not only will your techs be able to treat your loyal customers like friends, but they also won’t try to sell them services they’ve already bought, and can tailor what they offer to each customer’s individual needs.

Ditch missing paperwork.

If your HVAC business is paper-based, those papers can easily be lost or forgotten, which delays jobs — or even means appointments get missed. ServiceTitan Mobile avoids this problem altogether by having all customer documents uploaded to the cloud and accessible via each tech’s tablet.

You can trigger specific forms to appear automatically at a specific time in the job cycle, which makes it easy for your techs to remember every step of your sales and service process.

Build estimates with just a few taps.

Using its cloud-based system, ServiceTitan Mobile allows HVAC businesses to manage product and price updates across its entire system. Updates are made in real-time so every tech has access to the latest information, so there’s no excuses for charging the wrong price or selling a product that’s not in stock.

Customers can see the latest vivid, professional-quality photos, watch manufacturer videos, read product information out in the field, and HVAC techs can easily build estimates on the spot.

Manage pricing and product catalogs.

ServiceTitan Pricebook Pro, available on both ServiceTitan Mobile and in the office, is a fully integrated pricebook/product catalog that’s easy to update across the system. If you already have a great pricebook, it’s straightforward to import it into ServiceTitan and view it from within our platform.

Emulate the online shopping experience for homeowners.

Let customers browse and buy products and services right on the ServiceTitan Mobile interface. Any customer used to buying online will find it easy to tap and navigate their way through ServiceTitan’s presentation mode and bring the HVAC sales pitch up to date.

Close sales on the job site.

Using ServiceTitan Mobile, HVAC techs can take payments as soon as the work is completed. Capture check and credit card payments via the tablet’s inbuilt 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.

How ServiceTitan’s Automation Improved Performance at One HVAC Company

After being hired as General Manager of Air Comfort Heating & Cooling, Chris Landgrebe quickly found that the contractor’s software was antiquated and started looking for a suitable alternative. He persuaded the company’s owners to opt for ServiceTitan’s HVAC Software.

After some resistance to the new software from techs and CSRs who were trying to use ServiceTitan in the same way as they had used their previous software, Landgrebe called in ServiceTitan guru Kathy Nielsen to train the team on how to use it correctly. The company soon began to reap the benefits.

According to Landgrebe, ServiceTItan’s dashboard automation — which shows calls coming in, displays who is calling alongside their service history, and records every call for future reference — has made one of the biggest differences.

“From an efficiency standpoint, all of the little features we can automate, so I can have my CSR, my bookkeeper, and my dispatcher focus on driving the business, is what's made the biggest difference,” Landgrebe says, “Having everything in one spot is awesome. It's just an all-encompassing software program, and if used the way it's designed, the impact on business is infinite for the positives.”

Want to see how ServiceTitan helps you run your business more efficiently? Schedule a call with us to learn more about how our software, and accompanying mobile app, can help you grow your HVAC business.


iOS and Android - Free

This app was created by GEMAIRE, an independent distributor for heating, cooling, and refrigeration products since 1969. The company continues to be one of the biggest HVAC distributors in the country. 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 for a personal online account, much like you find on any major retailer’s website. Just sign in with Face or Touch ID, so you don’t need to remember a pesky password when you’re in the field or in front of 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 allHVAC 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.

3. CoolCloud HVAC

iOS and Android - Free

The CoolCloud HVAC app is quite different from the other apps listed here. Brought to you by Goodman Manufacturing Company, 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 equipment’s energy efficiency and overall performance.

4. Carrier Enterprise HVAC Assist

iOS and Android - Free

If you work with Carrier products, you’ll find this HVAC service app to be particularly handy. You can sign in to link to your online Carrier account, view prices, check orders, see real-time product availability and more. Online reviewers of the app laud its user-friendliness and ease of looking up parts, along with its overall convenience.

5. ServiceTitan® Invoice Generator

Make it easy for your HVAC technicians working in the field to create, save, email, and text digital invoices from any smartphone or tablet with ServiceTitan’s free Invoice Generator Tool.

Cut down on paperwork, streamline invoicing, and provide homeowners with a digital invoice they can pay immediately.

6. ServiceTitan® Labor Rate Calculator

Use ServiceTitan’s free 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.

HVAC Calculator Apps

7. ServiceTitan® HVAC Load Calculator

No matter which HVAC app you choose to use to streamline your workflow, you’re definitely going to want to bookmark this handy ServiceTitan HVAC Load Calculator. An easy-to-use online calc quickly gauges the BTU range for any particular dwelling. It factors in the interior square footage, amount of windows, and it even considers your region’s climate. This HVAC load calculator makes it easy to determine the HVAC system required.

8. HVAC Buddy®

iOS - $9.99

This HVAC charging app gives users the deluxe version of the HVAC Check & Charge! HVAC Buddy is the all-in-one HVAC service app that keeps your techs working efficiently and safely. It’s highly rated for making HVAC work easier with its refrigerant charging and diagnostic capabilities. When servicing any kind of HVACR equipment, just whip out your HVAC troubleshooting app to accurately diagnose and calculate the proper refrigerant charge.

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.

9. HVAC Refrigerant PT™

iOS - $5.99; Android - $4.99

Designed for the HVAC professional, the HVAC Refrigerant PT™ app offers readily accessible refrigerant information — from bubble and dew pressures to a full pressure/temperature (PT) chart. The HVAC app includes information for 33 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.

10. HVACR Fault Finder

iOS and Android - Free

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 with ease. Use this app for all of your air conditioning and refrigeration jobs.

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.

11. HVAC School

iOS and Android - Free

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!

12. HVAC Practice Test

iOS - Free

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 1,000 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.

13. HVACR Check & Charge™

iOS and Android - Free

Need a straightforward, on-the-job refrigerant charge calculator? From Emerson Climate Technologies, HVAC 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, the 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.

14. iManifold™

iOS and Android - Free

From the company that brought you one of the newest HVAC technology tools, 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.

The #1 newsletter for the trades.

15. Ref Tools by Danfoss

iOS and Android - Free

The Danfoss Group — a leading manufacturer and service provider for refrigeration, air conditioning, heating, and more — applied its innovative engineering solutions to this HVAC and Refrigerant Slider app. It’s a no-frills mobile converter for quick and accurate pressure-to-temperature conversions.

The user-friendly converter covers 69 different refrigerants — all based on theNational Institute of Standards and Technology (NIST) refrigerant properties. The HVAC app calculates conversions using the Antoine equation, which shows the semi-empirical correlations that describe the relationship between vapor pressure and temperature of pure components. 

In true Danfoss fashion, this app contains critical information, such as the Global Warming Potential (GWP) and Ozone Depleting Potential (ODP).

16. HyTools

iOS and Android - Free

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 technicians in the HVAC field. 

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

Utility HVAC Apps

17. ServiceTitan® HVAC Duct Calculator

Want to know the size of the duct by airflow or by dimensions? Maybe you want to know the range of duct sizes. With the ServiceTitan HVAC Duct Calculator app, you can quickly size a range of duct sizes or focus on one HVAC duct run. 

Our duct-sizing HVAC app is like the digital alternative to the traditional Trane Ductulator. Various modes allow you to input multiple parameters to find sizes that fall within the friction loss bounds.

18. iHandy Level

iOS and Android - Free

There are other leveling apps on the market, but this HVAC app is fully functional with calibration capability. It allows you to work easily around slopes, angles, and verticals with your smartphone.

The free app comes with calibration instructions and includes woodgrain and lighting effects to enhance the user experience.

19. CompanyCam

iOS and Android - Free

The CompanyCam app enhances field-to-office communications by leveraging technology to deliver real-time images and so much more. This smart photo HVAC service app minimizes the need for technician-to-CSR phone calls, which clog up the phone lines for calling customers. It also provides a visual glossary of past work.

CompanyCam automatically organizes photos by location using GPS technology, so all photos are organized by job site for easy referencing. The CompanyCam app also helps identify photos with automatic timestamping. With tag and filter options, categorize photos in a way that makes sense for your company (i.e., A/C installation). Just like social media pictures, employees can comment, leave a voice note, or tag people on any photo.

This HVAC app helps home service companies mitigate any employee or customer disputes by providing visual evidence. It also gives owners and managers a bird’s-eye view of the company’s day-to-day operations without the interruption of uploading, emailing, or texting photos. The creators of CompanyCam built this app to facilitate on-site productivity and even help HVAC companies save money and time.

20. ServiceTitan® 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. Display this free ServiceTitan tool on your company website, for homeowners and commercial customers to easily compare the cost of running their current system to what a new A/C or heat pump with a higher SEER rating costs.

How to Choose the Best HVAC App for Your HVAC Techs

When deciding exactly which HVAC service app to download, think about your HVAC pros’ specific needs and how often they'll actually use each one. All technicians have their own work styles, so the calc and utility apps you provide should be unique to them. Give techs the option to choose from a range of apps rather than dictating which ones they should use.

Want to see how ServiceTitan helps you run your business more efficiently? Schedule a call with us to learn more about how our software, and accompanying mobile app, can help you grow your HVAC business.

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.

Learn More

Related posts