# iCelsius vs Phone Tester

The clearest difference is in-app purchases: iCelsius at none against Phone Tester's 1. iCelsius also leads on ads (none vs shown) and update cadence (every 2 months vs every 10 months). On price, rating, review sentiment and device support there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.2 for iCelsius against 4.3 for Phone Tester. That said, the two scores are not equally well evidenced: iCelsius has 136 ratings behind it against 16, so its average is the more settled of the two. Written reviews are what separate them: 36% of iCelsius's written reviews are positive against 38% of Phone Tester's.

iCelsius ships an update every 2 months, Phone Tester every 10 months. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | iCelsius | Phone Tester |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (136 ratings)](https://appshunter.io/ios/app/icelsius/id434212879/reviews) | **[4.3 (16 ratings)](https://appshunter.io/ios/app/phone-tester/id1415300907/reviews)** |
| Number of ratings | **136** | 16 |
| Positive reviews | 36.0% of reviews | **38.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 10 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 41 MB | 26 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aginova Sarl](https://appshunter.io/developer/434212882) | [Kushal Patel](https://appshunter.io/developer/1315569101) |

## 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 Tester

[App page](https://appshunter.io/ios/app/phone-tester/id1415300907)

Test your device's hardware and screen functionality. Get detailed device information and generate a shareable PDF report of your tests.

**Highlights:** Hardware component testing, Screen tap and swipe gesture tests, Device information display, Test report generation, Shareable PDF reports

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ad-free version | $7.99 | one-time |


## Frequently asked questions

### Is iCelsius free?

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

### Is Phone Tester free?

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

### Which has better reviews, iCelsius or Phone Tester?

Phone Tester is rated higher. iCelsius averages 4.2 out of 5 from 136 ratings, while Phone Tester averages 4.3 from 16 ratings.

### Do iCelsius or Phone Tester have ads?

Phone Tester shows ads; iCelsius does not.

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

iCelsius ships an update every 2 months, and Phone Tester every 10 months. Most recently, iCelsius was updated on October 20, 2026 and Phone Tester on October 24, 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.*