# Study Stopwatch vs CNau

The clearest difference is iOS requirement: Study Stopwatch at 16.2 against CNau's 18.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Study Stopwatch sells 1 one-off in-app purchase and CNau sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Study Stopwatch | CNau |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 24 MB |
| Requires iOS | **16.2** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [kotobaz](https://appshunter.io/developer/1634727152) | [Rizka Reza Pahlevi](https://appshunter.io/developer/1843548137) |

## What reviewers say

### Study Stopwatch

[App page](https://appshunter.io/ios/app/study-stopwatch-hazime/id6461720701)

This app helps you track your study sessions with a simple stopwatch. Organize your learning by subject and visualize your progress on a calendar. Stay focused and motivated to achieve your academic goals.

**Highlights:** Study time tracking, Subject organization, Calendar progress review, Focused session recording, Progress visualization

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Widget機能 | $0.99 | one-time |


### CNau

[App page](https://appshunter.io/ios/app/cnau/id6753331497)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support CNau | $4.99 | one-time |


## Frequently asked questions

### Is Study Stopwatch free?

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

### Is CNau free?

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

### Do Study Stopwatch or CNau have ads?

Neither Study Stopwatch nor CNau shows ads.

### Which is updated more often, Study Stopwatch or CNau?

Study Stopwatch ships an update every 3 weeks, and CNau every 3 weeks. Most recently, Study Stopwatch was updated on October 24, 2026 and CNau on October 28, 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.*