左(右) vs Simple Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
左(右)
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左右の判断がすぐに出来ない方の為のアプリです。 このアプリがあれば、左と言われた時に視覚的にどちらが左か即座に判断出来ます。 これで右と左に悩まされていた日々とはおさらばです! 表示される文字は、Apple watchを装着している手首の位置と紐づいていますので、設定>一般>向き>手首の位置を変更することで表示される文字を変更出来ます。
Simple Timer
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This simple and user-friendly timer app is a convenient time management tool for everyone. With a visual display that makes it easy to see time passing, this app helps users develop a sense of time. Designed with an intuitive and straightforward interface, it supports time management for everyday life, study, work, and various activities. Key Features - Visual Timer: Track time easily with a circular indicator that shows the countdown in real-time, shrinking as time passes, making it easy to manage time. - Simple and Intuitive Interface: The straightforward design makes it accessible for users of all ages. With clearly organized buttons and icons, the app is designed to be easy for anyone to use. - Customizable Alert Sounds: Set recorded sounds as alerts, allowing you to receive notifications with the voices of family members or loved ones, creating a friendly and familiar experience. - Customizable Backgrounds: Personalize the timer’s background with your favorite photos or memories, making each use of the timer an enjoyable experience. This timer app supports habit-building, focus improvement, and effortless time management in everyday life. Perfect for taking breaks, managing tasks, or simply relaxing. Start efficient time management with an app that’s great for everyone!
Screenshots
Verdict
The clearest difference is in-app purchases: 左(右) at none against Simple Timer's 1. 左(右) also leads on ads (none vs shown) and update cadence (every 2 days vs every 5 days). 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. Simple Timer sells 1 one-off in-app purchase. 左(右) asks for nothing beyond the download.
左(右) ships an update every 2 days, Simple Timer every 5 days. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.
| Parameter | 左(右) | Simple Timer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days — better | Every 5 days |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod, Apple Watch — better | iPhone, iPad |
| Requires iOS | 10.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 1 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Osamu Hiraoka | EGG STUDIO LIMITED LIABILITY CO |
In-app purchases
左(右)
No in-app purchases
Simple Timer
- Pro Plan$2.99









