# Study Stopwatch vs Kadai

The clearest difference is in-app purchases: Kadai at none against Study Stopwatch's 1. Study Stopwatch's advantage is ads (none vs shown) and iOS requirement (16.2 vs 26.2). On price and device support there is nothing between them.

Both are free to download. Study Stopwatch sells 1 one-off in-app purchase. Kadai asks for nothing beyond the download.

## The numbers

| Metric | Study Stopwatch | Kadai |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 4 MB |
| Requires iOS | **16.2** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [kotobaz](https://appshunter.io/developer/1634727152) | [Naruhide Shibazaki](https://appshunter.io/developer/1870444141) |

## 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 |


### Kadai

[App page](https://appshunter.io/ios/app/kadai/id6758034034)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Study Stopwatch free?

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

### Is Kadai free?

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

### Do Study Stopwatch or Kadai have ads?

Kadai shows ads; Study Stopwatch does not.

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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.*