# Study Stopwatch vs AI Study Sheet

The clearest difference is update cadence: AI Study Sheet at every 3 days against Study Stopwatch's every 3 weeks. On price, review sentiment, 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 AI Study Sheet sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Study Stopwatch ships an update every 3 weeks, AI Study Sheet every 3 days. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Study Stopwatch | AI Study Sheet |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 2 MB | 8 MB |
| Requires iOS | 16.2 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [kotobaz](https://appshunter.io/developer/1634727152) | [Masaki Iino](https://appshunter.io/developer/6778272211) |

## 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 |


### AI Study Sheet

[App page](https://appshunter.io/ios/app/ai-study-sheet-active-recall/id6782023263)

Transform existing study materials into active-recall quizzes with AI. Snap photos or import PDFs, and the app automatically masks key terms for spaced repetition. Review materials with an auto-reveal mode that adapts to your learning behavior.

**Highlights:** Import photos and PDFs, Automatic AI masking of key terms, Review reminders, Auto Study Mode with sequential reveal, Adaptive learning based on study behavior, Organized study material library, Flexible material viewing and editing

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Saves | $4.99 | one-time |


## Frequently asked questions

### Is Study Stopwatch free?

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

### Is AI Study Sheet free?

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

### Do Study Stopwatch or AI Study Sheet have ads?

Neither Study Stopwatch nor AI Study Sheet shows ads.

### Which is updated more often, Study Stopwatch or AI Study Sheet?

Study Stopwatch ships an update every 3 weeks, and AI Study Sheet every 3 days. Most recently, Study Stopwatch was updated on October 14, 2026 and AI Study Sheet on October 15, 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.*