iCelsius vs Fahrenheit Thermometer Plus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iCelsius
Transform your iPhone, iPad, or iPod touch into a digital thermometer with this app. It works with a separate hardware probe to measure temperatures of liquids and other substances, create graphs, and set alerts. Ideal for cooking, science education, and quality control.
- Live temperature display
- Temperature graphing with pan/zoom
- Configurable temperature alarms
- Snapshot and continuous recording
- Recipe presets for cooking
- History of recorded readings
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Extend your Smartphone, Sense the World. The iCelsius is a temperature probe that turns the iPhone, iPad or iPod touch into a digital thermometer. IMPORTANT - Requires separate hardware available from http://www.icelsius.com to operate. The app can work in demo mode if no probe is connected. Compatible with wired and wireless (Wi-Fi) iCelsius probes! The current app downloaded from the App store will read temperature, create graphs and set up alerts. Please visit our website www.icelsius.com for more information! A stainless steel tip makes it possible to measure liquid temperatures such as baby formula, cooking ingredients, wine, tea, household appliances and hundreds of other applications. Can also be used in school or for teaching science, for equipment calibration, food quality control, cold chain control. The application is constantly improved based on user feedback. FEATURES • Live Display – shows useful temperature data in one shot • Graphs – with pan and zoom touch support • Alarms – Generate alarms when temperature goes outside a configurable (lower and/or upper) limit. • Snapshot Record – Ability to record a single reading, along with title, picture and note. • Continuous Record – Ability to continuously record readings as well as to add notes, take a picture and drop a pin on the graph. • History – Access all your previous records. • Recipes – For cooking and barbecue, choose preset recipe or create your own. Find more probes & wireless measurement devices on our product website www.icelsius.com and company website website www.aginova.com.
Fahrenheit Thermometer Plus
This free digital thermometer app uses GPS to measure and display the ambient temperature in Fahrenheit. It includes a Fahrenheit to Celsius conversion calculator and a barometer function for compatible devices. It also shows sunrise and sunset times, offering a reference for outdoor activities.
- GPS ambient temperature measurement
- Fahrenheit to Celsius conversion calculator
- Barometer function (iPhone 6/Plus and later)
- Badge displays Fahrenheit temperature
- Sunrise and sunset time display
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The simple free digital thermometer application that measures the ambient temperature of the current location measured by GPS and displays it in degrees Fahrenheit. The conversion calculator from Fahrenheit to Celsius with formula. Fahrenheit temperature is indicated in the badge (below zero is 1000, 1005 is -5 ℉). Barometric function by pressure sensor (iPhone 6 / Plus or later). Because it is outdoor temperature rather than indoor temperature, it is a reference for outfit clothes. Some areas are excluded. Displays sunrise time and sunset time.
Screenshots
Verdict
The clearest difference is ads: iCelsius at none against Fahrenheit Thermometer Plus's shown. iCelsius also leads on update cadence (every 2 months vs every 10 months) and monetization model (free vs ad-supported). On price, rating, review sentiment and ratings volume 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.2 for iCelsius against 4.3 for Fahrenheit Thermometer Plus. Both are backed by a comparable volume of ratings — 139 and 269 respectively. Written reviews are what separate them: 35% of iCelsius's written reviews are positive against 33% of Fahrenheit Thermometer Plus's.
iCelsius ships an update every 2 months, Fahrenheit Thermometer Plus every 10 months. The most recent releases landed on August 18, 2026 and August 16, 2026 respectively.
| Parameter | iCelsius | Fahrenheit Thermometer Plus |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (139 ratings) | 4.3 (269 ratings) — better |
| Positive reviews | 35.2% of reviews — better | 33.3% of reviews |
| Number of ratings | 139 | 269 — better |
| Update frequency | Every 2 months — better | Every 10 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 41 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Aginova Sarl | SHIGETO TAKAGI |
Customer experience
iCelsius
Fahrenheit Thermometer Plus
Bugs and requests
iCelsius
Reported bugs
33 issues- App crashes on startup
- App crashes when tapping graphs
- Temperature readings are incorrect/flashing
- Live view display is messed up
- App crashes when phone locks or switches apps
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- Connectivity issues (Wi-Fi, Bluetooth)
- Unit not recognized when connected directly
- App crashes on iPhone X
- App crashes on iPad and iPhone
- App crashes repeatedly after latest update
- Device becomes inoperable after update
- Pop-up to download newer version persists
- Probes show infinity or out of range readings
- Wi-Fi connection drops when iPad goes to sleep
- Dual probe app has only one set of alarm points
- App freezes when looking for Wi-Fi
- Unit not supported by iOS device error
- Wire leading to probe not ovenproof
- Recipe function only has high range for one probe
- Degrees C vs F display issues
- Graph display substandard
- App doesn't update temperature when not running
- App doesn't track temperature prior to current session after restart
- Unit never connects to home wireless network
- Temperature gauge no longer reports decimal values
- Recent update makes app useless
- Cannot tell if unit is charged
- Sensor inaccurate out of the box
- Sensor stopped working after a week or two
- App shows wrong temperatures in demo mode
- Graph zoom is useless (cannot zoom out to longer time scales)
- Cannot zoom temp scale without zooming time scale
- App doesn't run under iOS 7
Requested features
18 requests- Fix crashing issues
- Improve Wi-Fi and Bluetooth connectivity
- Ensure compatibility with newer iOS versions
- Improve remote monitoring reliability
- Fix data loss when switching apps
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- Add dual alarm points for dual probes
- Improve recipe function (high range for one probe)
- Fix Celsius/Fahrenheit display issues
- Improve graph display (zoom, time span, temp span)
- Allow background notifications/alarms
- Add ability to call/text on alarm
- Make probes ovenproof
- Improve probe durability/lifespan
- Allow power supply via mini USB
- Separate time and date columns in CSV export
- Allow zooming on temperature scale in graphs
- Make app work without hardware (demo mode improvement)
- Improve documentation for non-techies
Fahrenheit Thermometer Plus
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iCelsius
No in-app purchases
Fahrenheit Thermometer Plus
No in-app purchases
Questions
Is iCelsius free?
Is Fahrenheit Thermometer Plus free?
Which has better reviews, iCelsius or Fahrenheit Thermometer Plus?
Do iCelsius or Fahrenheit Thermometer Plus have ads?
Which is updated more often, iCelsius or Fahrenheit Thermometer Plus?
Other comparisons
