KujiraTimer vs Study Stopwatch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KujiraTimer
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.
- Activity time tracking
- Pause timer functionality
- Daily/weekly/monthly/yearly summaries
- Quick start alarm timer
- Simple interface
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Kujira means "whale" in Japanese. KujiraTimer is a simple and easy-to-use time tracking app that records time for your activities. For example, learning, exercise, reading, etc. When you want to start learning, just press the start button on the screen without specifying what subject to start. After finishing the learning, specify that subject and save it. Then, while waiting for a cup ramen with an alarm timer at a break time, you will check the achievement status of this week. You can do such a usage. - Time Tracking + Just press the start button. Then specify activity after finishing timer + pause + dayly/weekly/monthly/yearly summary graph - Alarm Timer + Quick start. It is a simple kitchen timer
Study Stopwatch
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.
- Study time tracking
- Subject organization
- Calendar progress review
- Focused session recording
- Progress visualization
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Hazime is a simple stopwatch app for tracking your study time. Record your learning sessions, organize your subjects, and review your progress on the calendar. Keep moving forward one focused session at a time. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | KujiraTimer | Study Stopwatch |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 25.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 18.1 | 16.2 — better |
| Further details — not scored | ||
| Size | 11 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Takashi Shinyashiki | kotobaz |
Customer experience
KujiraTimer
Study Stopwatch
In-app purchases
KujiraTimer
No in-app purchases
Study Stopwatch
- Widget機能$0.99
Questions
Is KujiraTimer free?
Is Study Stopwatch free?
Do KujiraTimer or Study Stopwatch have ads?
Which is updated more often, KujiraTimer or Study Stopwatch?
Other comparisons
