Best Ref Tools Apps

188+ iOS apps curated and reviewed

4.4 avg rating
20 free apps
Updated June 2026

Looking for free ref tools apps? 20 of our 188+ tracked titles are free to download โ€” no subscription, no trial. The rest are premium picks worth paying for.

Top Picks for Ref Tools

Ref Tools#1

Ref Tools by Danfoss A/S

All-in-one HVACR app
Editor's Choice
๐Ÿ”ง Utilities
3.8(47 ratings)
Free
Ref Tools screenshot 1
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Ref Tools screenshot 6

This all-in-one HVACR app provides essential tools for technicians, including refrigerant calculators, troubleshooting guides, and product finders, to streamline workflow and increase efficiency. Download the app to access a collection of useful tools and resources to help you get the job done quickly and effectively.

Danfoss Troubleshooter#2

Danfoss Troubleshooter by Danfoss A/S

Troubleshoot HVACR systems
Strong Contender
๐Ÿ”ง Utilities
3.7(3 ratings)
Free
Danfoss Troubleshooter screenshot 1
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This mobile application helps HVACR technicians diagnose and resolve common issues with heating, ventilation, air conditioning, and refrigeration systems through a user-friendly interface. By selecting the affected system area and symptom, technicians can quickly identify possible causes and solutions, making it a valuable time-saving tool for resolving service calls.

HVACR Check & Charge#3

HVACR Check & Charge by Copeland LP

PT Charts Superheat Subcooling
Worth Considering
๐Ÿ” Reference
4.8๐Ÿ˜Š(16K ratings)
Free
HVACR Check & Charge screenshot 1
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HVACR Check is a powerful tool for HVAC technicians that streamlines equipment checklists, service reports, and maintenance workflows. Simplify your work processes and stay organized with this all-in-one solution.

What We Love

  • ๐Ÿš€ Convenient
  • ๐Ÿš€ Great program
  • ๐Ÿš€ Reliable app
  • ๐Ÿš€ Easy and quick charging reference

Room to Improve

  • ๐Ÿ› Pressure settings not helpful
  • ๐Ÿ”’ Concerning privacy policy
  • ๐Ÿ› Restricted temperature range

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4
Magnetic Tool
Magnetic Tool
Magnetic Tool
Test AC & DC Solenoid Coils
Free

This mobile application helps air conditioning and refrigeration technicians test AC and DC solenoid coils quickly and easily by using a smartphone's magnetometer to detect magnetic fields. Simply open the app, hold it up to the solenoid coil, and if the wheel spins, the coil is working properly, with options for simple or advanced modes and audio or haptic feedback.

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Harbor Freight Tools
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Harbor Freight Coupons
Free

Discover the latest coupons, deals, and exclusive offers with an app dedicated to tools and savings. Easily browse products, watch demos, check availability, and sync wish lists across devices. Join the Inside Track Club for even more discounts and stay informed about America's top retailer of quality tools at unbeatable prices.

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6
Copeland Mobile
Copeland Mobile
Copeland Mobile
by Copeland LP
Free

Access over 30 years of Copeland product information with the intuitive Copelandโ„ข Mobile app. Get instant access to air conditioning and refrigeration product specifications, parts listings, wiring diagrams, compressor diagnostics, and more, designed specifically for the HVACR service industry. Download now for on-the-go support and troubleshooting. For more information, visit https://climate.emerson.com/mobileapps.

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7
HVAC School
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8
Bluon HVAC
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HVAC Tools
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Discover a powerful HVAC tool with access to a vast database of 500,000 HVAC models for manuals and part lists, troubleshooting support from MasterMechanic A.I., and live assistance from veteran technicians. Join the largest HVAC community to elevate your industry knowledge and skills today.

๐Ÿ”ง Utilities
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9
Low-GWP Tool
Low-GWP Tool
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Free
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(0)
10
TXV Superheat Tuner
TXV Superheat Tuner
TXV Superheat Tuner
for HVACR technicians
Free

This tool helps HVACR technicians optimize superheat in cooling systems quickly and efficiently, providing valve-specific adjustment recommendations with just a few inputs. By using advanced algorithms, technicians can optimize a system in under 15 minutes, boosting energy efficiency and saving customers money on energy costs.

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11
Electrician Handy Tool
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This all-in-one tool helps electricians with their daily work by providing calculators for voltage drop, conduit bending, and fractions, making electrical work easier and more efficient. Try it out to streamline your tasks and get the job done quickly and easily.

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12
BITZER REFRIGERANT RULER
BITZER REFRIGERANT RULER
BITZER REFRIGERANT RULER
Determine refrigerant data
Free

Quickly determine refrigerant data, including properties and environmental impact, with an intuitive app featuring over 100 refrigerants. Easily convert temperature to pressure, access detailed information, and customize settings for efficient use. Start optimizing your refrigeration processes now.

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13
RYOBI
RYOBI
RYOBI
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Effortlessly manage, monitor, and maximize your tools with our all-in-one tool management app. Stay updated with the latest product releases, manage connected tools, access warranty information, and explore the full product catalog. Simplify your tool management experience today!

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14
Dremel
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Introducing the Dremel 8260
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This smart tool companion app provides users with superior performance, usage insights, and personalized recommendations for their rotary tool, allowing them to control, monitor, and manage their tool's performance. With the app, users can optimize their tool's usage, receive performance alerts, and access interactive guides to find the right accessories and speed for their projects.

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15
KoolCode
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This mobile application provides instant access to alarm status and parameter descriptions for Danfoss refrigeration controllers, allowing technicians to quickly look up codes and troubleshoot issues on-site. Download the app to get a handy offline tool that helps you work more efficiently, with features like quick code translation, hierarchical controller selection, and automatic QR-code scanning.

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16
Charlotte Motor Speedway
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This official app brings fans closer to the action, providing event information, exclusive content, and personalized offers and experiences. Get ready for a seamless event experience with features like live audio, fan guides, ticket information, and more, all at your fingertips.

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17
F-Gas Solutions
F-Gas Solutions
F-Gas Solutions
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(0)
18
SuperCool Slide Rule HVAC
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SuperCool Slide Rule HVAC
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Get advanced solutions for HVAC problems with an interactive app that guides technicians through repair steps. Simplify complex issues and enhance your repair processes.

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19
Lee's Tools Catalog Shopping
Lee's Tools Catalog Shopping
Lee's Tools Catalog Shopping
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Search and shop from a vast library of over 1.8 million tools and parts from top brands, and take advantage of discounted prices on high-quality products. Find everything you need in one place, backed by expert service and support from an authorized center for over 40 tool manufacturers.

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P-T Calculator
P-T Calculator
P-T Calculator
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This comprehensive calculation tool helps HVAC/R technicians with pressure/temperature relationships, superheat/subcool temperatures, and refrigerant calculations, featuring automatic altitude correction and unit conversions. Download the app to easily perform calculations, access refrigerant information, and utilize handy tools to streamline your work.

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