Comparison

Ref Tools vs KE2 Sensor Tool

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Ref Tools

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.

Highlights
  • Refrigerant Slider for P/T calculations
  • Solenoid valve coil testing tool
  • Refrigeration system troubleshooting guide
  • Product data finder
  • Spare parts ordering
  • Low-GWP refrigerant comparison
  • TXV Superheat optimization
  • Educational podcasts
Features
Read full description

Get the guidance, support, information, and tools you need—on the job and in the field. Ref Tools is a free, powerful app that contains essential tools every HVACR technician needs in their digital toolbelt. Ref Tools offers a collection of useful air conditioning and refrigeration tools: Refrigerant Slider As a featured part of Ref Tools, you get all the features and functionality that made Refrigerant Slider a hit with millions of installers around the world. 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 Get help diagnosing issues in refrigeration systems, so you can quickly identify symptoms and find recommended solutions. Product Finder Find 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 and service kits for air conditioning and refrigeration applications. 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. Podcasts The workday can be full and the road long, so Ref Tools also provides you with some educational entertainment. You can listen to podcasts, including the popular Chilling with Jens podcast, directly in the app. So, take a break and chill out a bit while learning something new about refrigeration. More about Refrigerant Slider Refrigerant Slider, now a part of Ref Tools, helps you quickly calculate the pressure-to-temperature ratio for more than 80 refrigerants, including natural refrigerants such as ammonia and transcritical CO2. Refrigerant Slider also provides you with information about each refrigerant, including Global Warming Potential (GWP) and Ozone Depleting Potential (ODP). You can switch between the IPCC AR4 and AR5 values, where AR4 values are used in relation to the European F-Gas regulations. Refrigerant Slider’s P/T calculations use extended curve–fitting models based on Refprop 10 results. You can also see both dew and bubble point for refrigerants with glide. Streamline your workflow Ref Tools goes beyond just providing quick access to helpful tools; it helps you save time by allowing you to track your most visited service sites and save unique settings for each one. Simplify each service call with ease. Feedback Your input matters – we would love to hear it from you. We're committed to continuously improving Ref Tools to meet your needs. If you encounter a bug or have a feature suggestion, please use the in-app feedback function available in Settings. Alternatively, you can reach us via email at coolapp@danfoss.com. Danfoss Climate Solutions At Danfoss Climate Solutions, we engineer energy-efficient solutions to help the world get more out of less. Our innovative products and solutions enable a decarbonized, digital, and more sustainable tomorrow, and our technology supports a cost-efficient transition to renewable energy sources. With a strong foundation in quality, people, and the climate, we drive the energy, refrigerant, and food system transitions needed to achieve climate goals. Read more about us at www.danfoss.com. Terms and Conditions apply for use of the app.

About

KE2 Sensor Tool

Features
Read full description

KE2 Sensor App Professional Monitoring for Industrial Sensors KE2 Sensor App provides comprehensive management and monitoring capabilities for Minew industrial sensors. Monitor temperature, humidity, and environmental conditions with enterprise-grade reliability. Key Features: • Fast Bluetooth Scanning - Instantly discover nearby sensors - Clear visualization of signal strength and battery status - Filter sensors by type and model • Real-Time Monitoring - Track temperature and humidity with high precision - Monitor door contact sensors for security applications - View status changes and alerts instantly - Receive warnings when conditions exceed thresholds • Historical Data Analysis - Download and visualize complete sensor history - Chart temperature and humidity trends over time - Export data to CSV for detailed analysis - Review historical alarms and warnings • Advanced Configuration - Customize sensor broadcast parameters - Configure reporting intervals for optimal battery life - Set alarm thresholds for critical conditions - Choose between Celsius and Fahrenheit units • Industrial-Grade Reliability - Enhanced Bluetooth connectivity with automatic recovery - Memory-safe operations to prevent crashes - Defensive programming techniques - Robust error handling and reconnection Compatible Sensors: • KE2 Temperature + Humidity Ideal For: • Cold chain monitoring • Manufacturing facilities • Laboratory environments • Food storage compliance • Building management systems • Environmental monitoring KE2 Sensor App: The professional solution for industrial environmental monitoring.

Screenshots

Ref Tools4 screens
KE2 Sensor Tool3 screens

Verdict

The call

The clearest difference is update cadence: KE2 Sensor Tool at every 2 weeks against Ref Tools's every 5 weeks. Ref Tools's advantage is iOS requirement (15.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Ref Tools ships an update every 5 weeks, KE2 Sensor Tool every 2 weeks. The most recent releases landed on September 29, 2026 and September 7, 2026 respectively.

Scorecard2 real differences · 8 level
Ref Tools versus KE2 Sensor Tool: the parameters behind the verdict, then further details
ParameterRef ToolsKE2 Sensor Tool
PriceFreeFree
Rating3.9 (52 ratings) — better—
Positive reviews57.6% of reviews—
Number of ratings52 — better—
Update frequencyEvery 5 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size98 MB2 MB
Age rating4+4+
DeveloperDanfoss A/SKE2 Therm Solutions

Bugs and requests

Ref Tools

Reported bugs

27 issues
  • CRASHED instantly on Mac Mini M4
  • App won’t open on iPhone
  • App flashes up and disappears
  • Cannot open app
  • Immediately shuts off since recent release
Show 22 more
  • Crash au lancement since update
  • Will not save to Home Screen
  • Incorrect PT Charting for r134a
  • Information doesn’t slide down
  • Crashes on iOS12.1.4
  • App won’t open since previous update
  • List of refrigerants shifted upwards on iPhone 10
  • Stuck on R134a, needs update for current iOS
  • R744A only goes to 60 psi
  • Scale did not go low enough for deep vacuum
  • Missing R22 on Apple version
  • Missing R717 (Ammonia)
  • Missing R-22
  • Missing R124a
  • No longer lists Ammonia
  • Missing Refrigerants since app update
  • Missing Ammonia and CO2
  • r410a is missing since update
  • Removed r22, 410a, and 407c
  • Refrigerants missing now
  • Removed slider for ammonia
  • Scale doesn't go into vacuum

Requested features

18 requests
  • More residential AC information
  • Troubleshooter for Residential & Commercial
  • Add SP22 refrigerant
  • Add R-11 refrigerant
  • Add R-123 range down to 40 degrees
Show 13 more
  • Add R744 and R744A to 0 psia
  • Scale to go lower for R-123 vacuum
  • Add R410a
  • Add R407c
  • Add R404A
  • Add R22
  • Add R124a
  • Add Ammonia
  • Add CO2
  • Add R717 (Ammonia)
  • Scale going higher on CO2
  • Setting for high altitude
  • Scale to go into vacuum

KE2 Sensor Tool

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Ref Tools

No in-app purchases

None

KE2 Sensor Tool

No in-app purchases

Questions

Is Ref Tools free?
Ref Tools is free to download, with no in-app purchases.
Is KE2 Sensor Tool free?
KE2 Sensor Tool is free to download, with no in-app purchases.
Do Ref Tools or KE2 Sensor Tool have ads?
Neither Ref Tools nor KE2 Sensor Tool shows ads.
Which is updated more often, Ref Tools or KE2 Sensor Tool?
Ref Tools ships an update every 5 weeks, and KE2 Sensor Tool every 2 weeks. Most recently, Ref Tools was updated on September 29, 2026 and KE2 Sensor Tool on September 7, 2026.

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