# KujiraTimer vs Study Stopwatch

The clearest difference is review sentiment: Study Stopwatch at 100% against KujiraTimer's 25%. Study Stopwatch also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 5 months). KujiraTimer's advantage is in-app purchases (none vs 1). On price and device support there is nothing between them.

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

KujiraTimer ships an update every 5 months, Study Stopwatch every 3 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | KujiraTimer | Study Stopwatch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/kujiratimer/id1402988661/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 11 MB | 2 MB |
| Requires iOS | 18.1 | **16.2** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Takashi Shinyashiki](https://appshunter.io/developer/1235395472) | [kotobaz](https://appshunter.io/developer/1634727152) |

## What reviewers say

### KujiraTimer

[App page](https://appshunter.io/ios/app/kujiratimer/id1402988661)

Effortlessly track your time spent on various activities like learning or exercise. Start a timer with a single tap and log your activity afterward. Review your progress with daily, weekly, monthly, and yearly summary graphs.

**Highlights:** Activity time tracking, Pause timer functionality, Daily/weekly/monthly/yearly summaries, Quick start alarm timer, Simple interface

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is KujiraTimer free?

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

### Is Study Stopwatch free?

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

### Do KujiraTimer or Study Stopwatch have ads?

KujiraTimer shows ads; Study Stopwatch does not.

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

KujiraTimer ships an update every 5 months, and Study Stopwatch every 3 weeks. Most recently, KujiraTimer was updated on November 2, 2026 and Study Stopwatch on November 3, 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.*