# Thermometer vs iCelsius

The clearest difference is in-app purchases: iCelsius at none against Thermometer's 1. iCelsius also leads on ads (none vs shown). Thermometer's advantage is ratings volume (4.2K vs 139) and rating (4.4 vs 4.2). On price, review sentiment, update cadence and device support there is nothing between them.

Both are free to download. Thermometer sells 1 one-off in-app purchase. iCelsius asks for nothing beyond the download.

Thermometer holds the better App Store score, 4.4 against 4.2. That said, the two scores are not equally well evidenced: Thermometer has 4.2K ratings behind it against 139, so its average is the more settled of the two. Written reviews complicate that: 30% of Thermometer's written reviews are positive against 35% of iCelsius's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 27, 2026 and August 18, 2026 respectively.

## The numbers

| Metric | Thermometer | iCelsius |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (4.2K ratings)](https://appshunter.io/ios/app/thermometer/id357949214/reviews)** | [4.2 (139 ratings)](https://appshunter.io/ios/app/icelsius/id434212879/reviews) |
| Number of ratings | **4.2K** | 139 |
| Positive reviews | 30.1% of reviews | **35.2% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 48 MB | 41 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alexandre Morcos](https://appshunter.io/developer/1453181584) | [Aginova Sarl](https://appshunter.io/developer/434212882) |

## What reviewers say

### Thermometer

[App page](https://appshunter.io/ios/app/thermometer/id357949214)

This app transforms your iPhone or iPod Touch into a thermometer, displaying the exact outside temperature based on your current location. It provides detailed local weather conditions and allows you to check temperatures for other cities.

**Highlights:** Real-time outdoor temperature display, Location-based temperature readings, Local weather condition reports, Temperature checks for other cities, Celsius and Fahrenheit support, Universal app for all devices

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Temperature Forecast | $1.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Quick temperature display
- 💡 Useful for checking outdoor temperature

**What reviewers complain about**

- 🐛 Inaccurate temperature readings
- 🔍 Doesn't measure room/indoor temperature
- 💤 Doesn't update temperature in real-time
- 🔋 High battery consumption
- 📢 Excessive ads even in paid version

**Reported bugs**

- App crashes frequently
- Doesn't detect location properly
- Reported temperatures are inconsistent

**Requested features**

- Option to display indoor temperature
- Real-time temperature updates
- Ability to set temperature alerts/alarms


### 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


## Frequently asked questions

### Is Thermometer free?

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

### Is iCelsius free?

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

### Which has better reviews, Thermometer or iCelsius?

Thermometer is rated higher. Thermometer averages 4.4 out of 5 from 4.2K ratings, while iCelsius averages 4.2 from 139 ratings.

### Do Thermometer or iCelsius have ads?

Thermometer shows ads; iCelsius does not.

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

Thermometer ships an update every 2 months, and iCelsius every 2 months. Most recently, Thermometer was updated on September 27, 2026 and iCelsius on August 18, 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.*