One Timer vs Dual 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
Dual Timer
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Dual Timer は、上下に2つのタイマーを表示できるシンプルなタイマーアプリです。 カウントアップ/カウントダウンの切り替え、時間設定、赤表示しきい値などを用途に合わせて調整できます。 現在時刻を表示し、指定した時刻にベルを鳴らすことも可能です。 上下それぞれ個別にスタート/ストップ/リセット 両方同時のスタート/ストップ/リセットに対応 外部ディスプレイ(USB-C接続)へタイマー表示を出力可能 黒背景+大きな数字で視認性重視 指定した時間にベルを鳴らします(3回まで対応) 授業、プレゼン、発表会、会議、トレーニング、試合運用など、時間管理が必要な場面で活躍します。
Screenshots
Verdict
The clearest difference is in-app purchases: Dual Timer at none against One Timer's 4. On price, update cadence, ads 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. One Timer sells 4 in-app purchases, starting at $1.99 per month. Dual Timer asks for nothing beyond the download.
One Timer ships an update every 4 days, Dual Timer every 5 days. The most recent releases landed on October 5, 2026 and September 25, 2026 respectively.
| Parameter | One Timer | Dual 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 | Every 5 days |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.6 | 17.6 |
| Further details — not scored | ||
| Size | 42 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | DAIKI YUASA | kiyoshi yamamoto |
In-app purchases
One Timer
- PREMIUM$1.991 Month
- Buy me a coffee$1.99
- Buy me a burger$3.99
- PREMIUM$9.99
Dual Timer
No in-app purchases









