# iCelsius vs Phone Thermometer

The clearest difference is in-app purchases: iCelsius at none against Phone Thermometer's 2. iCelsius also leads on iOS requirement (12.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Phone Thermometer sells 2 in-app purchases, starting at $4.99 per 7 days. iCelsius asks for nothing beyond the download.

iCelsius ships an update every 2 months, Phone Thermometer every 5 weeks. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | iCelsius | Phone Thermometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (136 ratings)](https://appshunter.io/ios/app/icelsius/id434212879/reviews)** | — |
| Number of ratings | **136** | — |
| Positive reviews | 36.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 41 MB | 17 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aginova Sarl](https://appshunter.io/developer/434212882) | [洋洋 常](https://appshunter.io/developer/1847833029) |

## What reviewers say

### iCelsius

[App page](https://appshunter.io/ios/app/icelsius/id434212879)

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.

**Highlights:** Live temperature display, Temperature graphing with pan/zoom, Configurable temperature alarms, Snapshot and continuous recording, Recipe presets for cooking, History of recorded readings

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Accurate temperature readings
- 👍 Handy for monitoring
- 👍 Good for remote monitoring
- 👍 Works well for specific uses (e.g., cigars, BBQ)
- 👍 Good UI and graphing (when it works)

**What reviewers complain about**

- 🐛 Frequent crashes
- 🐛 Connectivity issues (Wi-Fi, Bluetooth)
- 🐛 Unreliable remote sensing
- 🐛 Inconsistent readings/inaccurate
- 🐛 Hardware failures (probes dying)

**Reported bugs**

- 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

**Requested features**

- 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


### Phone Thermometer

[App page](https://appshunter.io/ios/app/phone-thermometer/id6760281854)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Member | $4.99 | per 7 days |
| Annual VIP | $29.99 | per year |


## Frequently asked questions

### Is iCelsius free?

iCelsius is free to download, with no in-app purchases.

### Is Phone Thermometer free?

Phone Thermometer is free to download, with in-app purchases available.

### Do iCelsius or Phone Thermometer have ads?

Neither iCelsius nor Phone Thermometer shows ads.

### Which is updated more often, iCelsius or Phone Thermometer?

iCelsius ships an update every 2 months, and Phone Thermometer every 5 weeks. Most recently, iCelsius was updated on November 2, 2026 and Phone Thermometer on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*