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 — 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
🔧 Utilities
3.8(47 ratings)
Free
Ref Tools screenshot 1
Ref Tools screenshot 2
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Ref Tools screenshot 4
Ref Tools screenshot 5
Ref Tools screenshot 6

This app provides HVACR technicians with essential tools and information for field service. It includes refrigerant calculators, troubleshooting guides, product finders, and access to spare parts. Listen to educational podcasts to enhance your knowledge on the go.

Danfoss Troubleshooter#2

Danfoss Troubleshooter by Danfoss A/S

Troubleshoot HVACR systems
Strong Contender
🔧 Utilities
3.7(3 ratings)
Free
Danfoss Troubleshooter screenshot 1
Danfoss Troubleshooter screenshot 2
Danfoss Troubleshooter screenshot 3
Danfoss Troubleshooter screenshot 4
Danfoss Troubleshooter screenshot 5
Danfoss Troubleshooter screenshot 6

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
🔍 Reference
4.8😊(16K ratings)
Free
HVACR Check & Charge screenshot 1
HVACR Check & Charge screenshot 2
HVACR Check & Charge screenshot 3
HVACR Check & Charge screenshot 4
HVACR Check & Charge screenshot 5
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This app provides an instant mobile refrigerant charge calculator for HVACR applications. It supports various refrigerants and allows users to calculate the correct system charge based on superheat, subcooling, or airflow, along with environmental conditions.

What We Love

  • 🚀 Convenient
  • 🚀 Great program
  • 🚀 Reliable app
  • 🚀 Easy and quick charging reference

Room to Improve

  • 🐛 Pressure settings not helpful
  • 🔒 Concerning privacy policy
  • 🐛 Restricted temperature range

More Ref Tools apps to explore

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

This app helps technicians quickly test AC and DC solenoid coils. It uses your smartphone's sensors to detect magnetic fields, indicating if a coil is functioning correctly. Offers simple and advanced modes for easy or precise testing.

Solenoid coil testingMagnetic field detectionAudio and haptic feedback
💼 Business
(18)
free
5
Harbor Freight Tools
Harbor Freight Tools
Harbor Freight Tools
Harbor Freight Coupons
Free

Discover the latest coupons, instant savings, and exclusive deals for members. Browse tools, check local stock, and create wish lists. Scan barcodes in-store for more product information.

Latest coupons and instant savingsInside Track Club member dealsBrowse tools and watch videos
🛍️ Shopping
(216K)
free
6
Copeland Mobile
Copeland Mobile
Copeland Mobile
by Copeland LP
Free

Access a vast database of product information for air conditioning and refrigeration systems on your mobile device. Quickly find specifications, diagrams, and diagnostic tools. Includes AI-powered assistance and a "Where To Buy" locator.

Intelligent HVACR Assistance chatbotOnline product information database accessAuto-fill model recommendations
🔍 Reference
(5.1K)
free with in-app purchases
7
HVAC School
HVAC School
HVAC School
By Techs For Techs
Free

This app serves as a comprehensive resource for HVAC technicians, offering a podcast, tech tip articles, and interactive calculators. It aims to enhance knowledge of HVAC theory, industry updates, and essential mathematics for both current and aspiring professionals.

HVAC School podcast episodesTech tip articles by professionalsInteractive HVAC equation calculators
📚 Education
(81)
free
8
Bluon HVAC
Bluon HVAC
Bluon HVAC
HVAC Tools
Free

Access a vast database of HVAC models, manuals, and part lists to speed up your work. Utilize an AI-powered troubleshooting tool or connect with experienced technicians for real-time support.

500,000+ HVAC unit databaseManuals and part listsAI troubleshooting tool (MasterMechanic)
🔧 Utilities
(4.5K)
ad-supported
9
Low-GWP Tool
Low-GWP Tool
Low-GWP Tool
Climate-friendly refrigerants
Free
🔧 Utilities
(0)
10
TXV Superheat Tuner
TXV Superheat Tuner
TXV Superheat Tuner
for HVACR technicians
Free

This tool helps HVACR technicians quickly and accurately adjust thermostatic expansion valves. It uses advanced algorithms to provide valve-specific recommendations, optimizing cooling systems in minutes and improving energy efficiency.

Optimize superheat adjustmentsValve-specific recommendationsAdvanced algorithm calculations
🔧 Utilities
(4)
free
11
Electrician Handy Tool
Electrician Handy Tool
Electrician Handy Tool
All in one electricians tools
Free

This app provides electricians with essential tools for conduit bending, calculations, and quick reference. It simplifies electrical work with features like voltage drop calculation and a user-friendly fraction calculator.

Voltage drop calculatorConduit bending calculatorFraction calculator
📊 Productivity
(21)
free with in-app purchases
12
BITZER REFRIGERANT RULER
BITZER REFRIGERANT RULER
BITZER REFRIGERANT RULER
Determine refrigerant data
Free

This tool quickly determines refrigerant data, including properties, safety groups, GWP, and ODP. It offers intuitive temperature-to-pressure conversion and supports both metric and imperial units. Access detailed information and links to online resources for over 100 refrigerants.

Refrigerant data lookupTemperature-to-pressure conversionMetric and imperial unit support
🔍 Reference
(1.1K)
free
13
RYOBI
RYOBI
RYOBI
All-in-one tool management app
Free

Manage, monitor, and maximize your tools with this app. Register new purchases, track connected tools, and explore the product catalog. Access manuals, warranty information, and find nearby retailers.

Product registration with OCR and barcode scanningMonitor and manage connected toolsView tool status and metrics
🔧 Utilities
(13K)
free with in-app purchases
14
Dremel
Dremel
Dremel
Introducing the Dremel 8260
Free

This app connects to a smart rotary tool to provide usage insights, performance alerts, and speed recommendations. It helps users find the right accessories and settings for their projects, monitor tool battery life, and manage tool health.

Bluetooth pairing with smart rotary toolAccessory and speed recommendationsTool dashboard with battery and usage time
🌟 Lifestyle
(19)
free
15
KoolCode
KoolCode
KoolCode
by Danfoss A/S
Free

This utility app provides quick, offline access to alarm and parameter codes for refrigeration controllers. It helps service technicians and engineers easily look up information without needing manuals or laptops.

On-the-spot ADAP-KOOL controller informationAlarm status and parameter descriptionsOffline code lookup tool
🔧 Utilities
(1)
free
16
Charlotte Motor Speedway
Charlotte Motor Speedway
Charlotte Motor Speedway
by Speedway Motorsports, Inc
Free

Enhance your event experience with this official app. Access event details, news, exclusive content, and personalized offers. Navigate the venue, view schedules, and stay connected with social feeds.

Event details and informationLatest news, photos, and videosPersonalized offers and content
⚽ Sports
(67)
ad-supported
17
F-Gas Solutions
F-Gas Solutions
F-Gas Solutions
by GESTIMAT
Free

This app helps professionals understand and comply with European F-Gas regulations. It provides tools for calculating refrigerant loads, determining leak detection frequencies, and identifying suitable process fluids for various equipment.

F-Gas III regulation complianceRefrigerant load calculationLeak detection frequency guide
🔧 Utilities
(0)
free
18
SuperCool Slide Rule HVAC
SuperCool Slide Rule HVAC
SuperCool Slide Rule HVAC
by Designstein, llc
Free

This app offers a comprehensive suite of tools for HVAC technicians. It provides interactive guides, step-by-step repair instructions, and calculators for various HVAC calculations including superheat, subcooling, and duct sizing.

Superheat & Subcooling chargingDuct sizing & layout calculatorCompressor windings troubleshooter
🔧 Utilities
(185)
free
19
Lee's Tools Catalog Shopping
Lee's Tools Catalog Shopping
Lee's Tools Catalog Shopping
by Lee's Tools
Free

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.

🛍️ Shopping
(4)
20
P-T Calculator
P-T Calculator
P-T Calculator
by National Refrigerants, Inc.
Free

This tool simplifies HVAC/R technician tasks by calculating pressure/temperature relationships, superheat, and subcool. It automatically adjusts for altitude and offers English/Metric units. Easily access favorite refrigerants and supplementary information.

Pressure/Temperature calculationSuperheat/Subcool calculationAutomatic altitude correction
🔍 Reference
(51)
free

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