# iCelsius vs SYSMonitor

The clearest difference is rating: iCelsius at 4.2 against SYSMonitor's 3.6. iCelsius also leads on in-app purchases (none vs 1) and ads (none vs shown). On price, review sentiment, device support and iOS requirement there is nothing between them.

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

iCelsius holds the better App Store score, 4.2 against 3.6. Both are backed by a comparable volume of ratings — 139 and 38 respectively. Written reviews complicate that: 35% of iCelsius's written reviews are positive against 40% of SYSMonitor's, so the app with the better star average is not the one people write more warmly about.

iCelsius ships an update every 2 months, SYSMonitor every 5 months. The most recent releases landed on October 16, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | iCelsius | SYSMonitor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (139 ratings)](https://appshunter.io/ios/app/icelsius/id434212879/reviews)** | [3.6 (38 ratings)](https://appshunter.io/ios/app/sysmonitor-system-status-wgt/id937687645/reviews) |
| Number of ratings | **139** | 38 |
| Positive reviews | 35.2% of reviews | **39.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 41 MB | 15 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) | [泽辉 王](https://appshunter.io/developer/892030257) |

## 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


### SYSMonitor

[App page](https://appshunter.io/ios/app/sysmonitor-system-status-wgt/id937687645)

Monitor your device's performance with real-time insights into CPU, memory, and storage usage. Track network speed, view detailed device information, and access key metrics directly from your Today widget. Understand your device's health and optimize its performance.

**Highlights:** CPU usage monitoring, Memory (RAM) status, Storage (ROM) visualization, Real-time network speed, Network details (IP, SSID, Ping), Basic device information

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Permanently Remove ads | $1.99 | one-time |


## Frequently asked questions

### Is iCelsius free?

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

### Is SYSMonitor free?

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

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

iCelsius is rated higher. iCelsius averages 4.2 out of 5 from 139 ratings, while SYSMonitor averages 3.6 from 38 ratings.

### Do iCelsius or SYSMonitor have ads?

SYSMonitor shows ads; iCelsius does not.

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

iCelsius ships an update every 2 months, and SYSMonitor every 5 months. Most recently, iCelsius was updated on October 16, 2026 and SYSMonitor on October 9, 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.*