Vazio vs Vow Fasting
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Vazio
This app offers a minimalist approach to intermittent fasting with a focus on privacy and a clean interface. It provides tools to track fasting periods, understand metabolic stages, and view progress directly on your device's lock screen.
- Live Activities for Dynamic Island and Lock Screen
- Flexible fasting presets (16:8, 18:6, 20:4, OMAD)
- Metabolic stage tracking (Sugar Burning, Ketosis, Autophagy)
- Privacy-focused data storage on-device/iCloud
- Home Screen widgets for quick start/stop
- Dark Zen interface
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Vazio is the minimalist intermittent fasting companion designed for focus and privacy. Forget cluttered apps and invasive ads. Vazio respects your journey with a "Dark Zen" interface that looks stunning on your iPhone. Key Features: • Live Activities: See your remaining time directly on the Dynamic Island and Lock Screen. • Smart Timer: Flexible 16:8, 18:6, 20:4, and OMAD presets. • Metabolic Stages: Understand what's happening inside your body (Sugar Burning, Ketosis, Autophagy). • Privacy First: Your health data stays on your device and iCloud. No accounts, no tracking. • Widgets: Start or stop your fast instantly from your Home Screen. Start your journey to better metabolic health. Vazio offers in-app purchases that enhance the user experience. Auto-renewing subscriptions may be purchased to unlock additional content. Subscriptions are entirely optional and may be canceled at any time. Details are available in the Terms of Service, available here: https://vazio.app/legal/terms/
Vow Fasting
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Vow is a refined intermittent fasting tracker built for calm daily discipline. Start a fast, follow your progress, and understand each stage as your body moves through metabolic phases like digesting, fat burning, ketosis, and autophagy. Vow keeps fasting focused with a precise timer, clear progress, thoughtful reminders, and a minimal dark design made for daily practice. Whether you follow 16:8, 18:6, 20:4, 24-hour fasts, or custom fasting goals, Vow helps you track every session with clarity. FEATURES • Elegant fasting timer with real-time progress • Intermittent fasting plans including 16:8, 18:6, 20:4, and 24h • Metabolic phase tracking from digesting to fat burning, ketosis, and autophagy • Fasting history, streaks, and weekly insights • Custom and extended fasting durations • Goal reminders and phase update notifications • Minimal dark interface with premium themes • Home Screen widgets and Live Activity support Vow Pro Unlock extended fasting protocols, custom durations, premium themes, advanced insights, and premium widgets. Vow is not medical advice. If you have a medical condition, are pregnant, under 18, or have a history of eating disorders, consult a healthcare professional before fasting. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://vowfasting.com/privacy
Screenshots
Verdict
The clearest difference is update cadence: Vazio at every 3 days against Vow Fasting's fortnightly. On price, ads, in-app purchases 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. Vazio sells 3 in-app purchases, starting at $0.99 per 7 days and Vow Fasting sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Vazio ships an update every 3 days, Vow Fasting fortnightly. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.
| Parameter | Vazio | Vow Fasting |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone |
| Requires iOS | 18.6 | 17.6 — better |
| Further details — not scored | ||
| Size | 10 MB | 13 MB |
| Age rating | 17+ | 4+ |
| Developer | Andres Rojas | FILIP LUCCA KEJSER DAMICI |
In-app purchases
Vazio
- Weekly Plan$0.997 Days
- Monthly Plan$1.991 Month
- Annual Plan7 Days trial$12.991 Year
Vow Fasting
- Vow Pro Monthly$4.991 Month
- Vow Pro Annual$39.991 Year









