KujiraTimer vs sheetMaker
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
sheetMaker
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Mark Sheet Creation App SheetMaker Supports up to 150 Questions: Create mark sheets with up to 150 questions, including descriptive and question formats. Manage Answers: Check past answers by period and easily track your performance over time. QR Code Sharing: Easily share your created mark sheets via QR codes. Extensive Customization: Customize choices and answer formats in detail. Multiple answers allowed.Mark Sheet Creation App SheetMaker Supports up to 150 Questions: Create mark sheets with up to 150 questions, including descriptive and question formats. Manage Answers: Check past answers by period and easily track your performance over time. QR Code Sharing: Easily share your created mark sheets via QR codes. Extensive Customization: Customize choices and answer formats in detail. Multiple answers allowed.
Screenshots
Verdict
The clearest difference is update cadence: sheetMaker at weekly against KujiraTimer's every 5 months. sheetMaker also leads on device support (3 vs 1) and iOS requirement (12.0 vs 18.1). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
KujiraTimer ships an update every 5 months, sheetMaker weekly. The most recent releases landed on September 7, 2026 and September 28, 2026 respectively.
| Parameter | KujiraTimer | sheetMaker |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 25.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 months | Weekly — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 18.1 | 12.0 — better |
| Further details — not scored | ||
| Size | 11 MB | 75 MB |
| Age rating | 4+ | 4+ |
| Developer | Takashi Shinyashiki | Reiji Yamaguchi |
In-app purchases
KujiraTimer
No in-app purchases
sheetMaker
No in-app purchases
Questions
Is KujiraTimer free?
Is sheetMaker free?
Do KujiraTimer or sheetMaker have ads?
Which is updated more often, KujiraTimer or sheetMaker?
Other comparisons
