One Timer vs Study Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
One Timer
Easily manage multiple timers simultaneously for everyday tasks like cooking or interval training. Quickly start timers with a single tap and customize their appearance with a wide range of colors. The app offers a premium plan for an ad-free experience and unlimited custom timers.
- Simultaneous multi-timer functionality
- One-tap timer launch
- Customizable color settings (RGB)
- Background notifications
- HIIT and Pomodoro timer support
- Stopwatch for work hours
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One Timer is a simple timer created by a developer who really wanted it. You want to time your family's instant noodles for 3 minutes and 5 minutes at the same time, but you can't do it quickly. You want to boil eggs for 8 and a half minutes while measuring pasta for 6 minutes, but you can't do it. You want to open the app and start it immediately with one tap. We've solved those everyday problems for you and me. --- This tool is useful in scenarios like below --- - As a timer for HIIT (High-Intensity Interval Training) - As a Pomodoro timer for study sessions - As a stopwatch to calculate working hours for freelance or contract work - For managing stamina in multiple social-network game apps --- Customizable Color Settings --- You can set the background and text colors using RGB values, allowing for free changes to any color. This feature enables you to boost motivation by changing to your favorite colors. --- How to use --- - Tap the desired time from the list on the left to start the timer. - You can quickly add another timer without switching screens by long-pressing the list. - For example, you can start multiple timers simultaneously by long-pressing 3 minutes and 5 minutes. - Notification when it goes into the background. --- PREMIUM Plan --- - No Ads - Unlimited Custom Timers --- Links --- https://40yd.app/one_timer_terms https://40yd.app/one_timer_policy
Study Timer
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A study timer that tracks and logs your study time to help you stay motivated to keep going. ■ Track study sessions with a timer • Simple start, pause, and log controls • Review your study log by subject with charts and breakdowns ■ Built to keep you going • See your current study streak (consecutive days) • Set your own rewards — "after 7 days" or "after 10 hours," your choice ■ Support for focus • A focus mode that silences notifications while you study ■ Manage your records • Export and import your study log as a file for backup • Duplicate entries are merged automatically ■ Premium plan (monthly) • Unlimited AI support • Ads removed Good for: students preparing for exams or certifications who want to log their daily study time and stay motivated to keep it up.
Screenshots
Verdict
The clearest difference is ads: One Timer at none against Study Timer's shown. One Timer also leads on update cadence (every 4 days vs fortnightly). Study Timer's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.6). On price 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. One Timer sells 4 in-app purchases, starting at $1.99 per month and Study Timer sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
One Timer ships an update every 4 days, Study Timer fortnightly. The most recent releases landed on October 5, 2026 and October 4, 2026 respectively.
| Parameter | One Timer | Study Timer |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 days — better | Fortnightly |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 42 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | DAIKI YUASA | Mikoto Gateway |
In-app purchases
One Timer
- PREMIUM$1.991 Month
- Buy me a coffee$1.99
- Buy me a burger$3.99
- PREMIUM$9.99
Study Timer
- プレミアムプラン$0.991 Month









