Comparison

Vazio vs FastJoy

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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/

About

FastJoy

Features
Read full description

FastJoy is the simple, private way to track intermittent fasting. Pick a protocol, start the timer, and watch your fasting and eating windows in real time — no account, no paywall on the core timer, and everything stays on your device. WHY FASTWINDOW - Beautiful animated fasting timer with live elapsed time and progress ring - Choose 16:8, 18:6, 20:4, OMAD or a custom fasting window - Informational fasting stages as the hours add up (fat burning, ketosis, autophagy zone) - Current streak, today's eating window and target end time at a glance - Edit your start time anytime — perfect when you forget to hit start TRACK EVERYTHING - Full history of every fast with met-goal status - GitHub-style consistency heatmap of your fasting days - Weekly fasting hours and calendar overview STATS & PROGRESS - Average fast length, longest fast, completion rate and streaks - Fast-duration trend chart and this-week-vs-last comparison - Patterns by weekday and start time of day - Optional weight log with a clean trend chart - Dozens of achievements to keep you motivated REMINDERS THAT HELP - Get notified the moment your fasting goal is reached - Optional "time to start fasting" and hydration reminders - 100% local notifications — no servers, no tracking of your habits PRIVATE BY DESIGN - No sign-up, works fully offline - Optional Face ID / Touch ID lock - Export and import your data as JSON anytime - Available in English, Spanish, French, Italian, German and Portuguese FastJoy is a tracking aid only and does not provide medical or nutritional advice. Intermittent fasting is not suitable for everyone, including during pregnancy or with certain medical conditions. Consult a qualified healthcare professional before changing your eating patterns. Start your first fast today and build a routine that lasts.

Screenshots

Vazio4 screens
FastJoy4 screens

Verdict

The call

The clearest difference is in-app purchases: FastJoy at none against Vazio's 3. FastJoy also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.6). Vazio's advantage is ads (none vs shown). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Vazio sells 3 in-app purchases, starting at $0.99 per 7 days. FastJoy asks for nothing beyond the download.

Scorecard4 real differences · 5 level
Vazio versus FastJoy: the parameters behind the verdict, then further details
ParameterVazioFastJoy
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 days—
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS18.613.0 — better
Further details — not scored
Size10 MB41 MB
Age rating17+12+
DeveloperAndres RojasFerran Espuna

In-app purchases

3 purchases

Vazio

Subscriptions3
  • Weekly Plan$0.997 Days
  • Monthly Plan$1.991 Month
  • Annual Plan7 Days trial$12.991 Year
None

FastJoy

No in-app purchases

Questions

Is Vazio free?
Vazio is free to download, with in-app purchases available.
Is FastJoy free?
FastJoy is free to download, with no in-app purchases.
Do Vazio or FastJoy have ads?
FastJoy shows ads; Vazio does not.

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