# C vs Online Unit Converter

The clearest difference is price: Online Unit Converter at $0.99 against C's $9.99. Online Unit Converter also leads on update cadence (every 8 days vs every 5 weeks) and iOS requirement (9.0 vs 17.0). C's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

C costs $9.99 and Online Unit Converter $0.99 up front. Online Unit Converter sells 1 one-off in-app purchase. C asks for nothing beyond the download.

C ships an update every 5 weeks, Online Unit Converter every 8 days. The most recent releases landed on October 22, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | C | Online Unit Converter |
| --- | --- | --- |
| Price | $9.99 | **$0.99** |
| Rating | **[4.4 (40 ratings)](https://appshunter.io/ios/app/c-time/id553940406/reviews)** | — |
| Number of ratings | **40** | — |
| Positive reviews | 76.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 8 days** |
| Monetization | Free | — |
| Size | 3 MB | 32 MB |
| Requires iOS | 17.0 | **9.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Siegware](https://appshunter.io/developer/443908611) | [飞 李](https://appshunter.io/developer/1633407304) |

## What reviewers say

### C

[App page](https://appshunter.io/ios/app/c-time/id553940406)

Automatically track time spent at predefined locations like work or school. The app uses geofencing to log your entries and exits, providing daily, monthly, and yearly summaries. You can also manually start/stop tracking, edit entries, and export your data.

**Highlights:** Automatic time registration at places, Arrival/departure notifications, Manual start/stop counting, Edit recorded times, Export time data, Post time to social media

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

**In-app purchases:** none

**What reviewers like**

- 👍 Automatic time tracking
- 💡 Useful for salaried employees
- ✅ Accurate location logging
- ⏱️ Helps reconstruct time reports
- 🗺️ Tracks time at various locations

**What reviewers complain about**

- 🐛 Auto clock-in/out issues
- 📍 Geofence radius too large
- 🗺️ Difficulty adding new locations
- 📱 UI outdated/not optimized
- ❓ No privacy details provided

**Reported bugs**

- Automatic clock-in/out not triggering
- Locations not registering after iOS update
- Geofencing issues with iOS 15
- App switching continuously between two places
- Cannot add a name to a place

**Requested features**

- Fix automatic clock-in/out bug
- Improve location accuracy/radius control
- Link to Apple/Google Maps for address input
- Add client/job/project tracking
- Add notes/comments field


### Online Unit Converter

[App page](https://appshunter.io/ios/app/online-unit-converter/id6444185100)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP | $0.99 | one-time |


## Frequently asked questions

### Is C free?

C costs $9.99, with no in-app purchases.

### Is Online Unit Converter free?

Online Unit Converter costs $0.99, and also offers in-app purchases.

### Do C or Online Unit Converter have ads?

Neither C nor Online Unit Converter shows ads.

### Which is updated more often, C or Online Unit Converter?

C ships an update every 5 weeks, and Online Unit Converter every 8 days. Most recently, C was updated on October 22, 2026 and Online Unit Converter on October 4, 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.*