Devdy vs PerfectFast
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Devdy
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PFC管理を管理して、ボディメイクしていくアプリです。 ヘルスケアから体重、身長、アクティブエネルギーを元にエネルギー計算に使用します。 また体脂肪は変化の推移をグラフで見ることもできます。
PerfectFast
This app helps you track intermittent and extended fasting periods with a clean, focused interface. It supports various fasting schedules, custom durations, and provides detailed history and statistics to monitor your progress.
- Intermittent and extended fast tracking
- Custom fasting schedules
- Fasting history and statistics
- Reminders and notifications
- Apple Watch companion app
- Live Activity support
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PerfectFast helps you track intermittent and extended fasts with a calm, focused experience. Set up a fasting plan, follow your active fast, review your history, and see progress statistics without clutter. The app supports common fasting schedules, custom durations, reminders, fasting stages, history views, statistics, appearance settings, local data export, and Live Activity support on compatible devices. Log water, weight, blood glucose, and ketones beside your fasts, and read them on the fast's own clock in the Fast Timeline, with resting heart rate, heart rate variability, body composition, and sleep from Apple Health if you connect it. The Apple Watch companion lets you check your current or scheduled fast from your wrist, start or end a fast when your iPhone is nearby, and keep progress on your watch face with complications. Your fasting data stays on your device unless you choose to export or share it.
Screenshots
Verdict
The clearest difference is iOS requirement: Devdy at 11.0 against PerfectFast's 17.6. On price, update cadence, 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.
Devdy ships an update fortnightly, PerfectFast every 10 days. The most recent releases landed on October 6, 2026 and October 3, 2026 respectively.
| Parameter | Devdy | PerfectFast |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Fortnightly | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 11.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 59 MB | 27 MB |
| Age rating | 4+ | 12+ |
| Developer | Devenue Inc. | Idan Lupinsky |
In-app purchases
Devdy
No in-app purchases
PerfectFast
No in-app purchases
