Fast vs BioAI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fast
This app helps you track intermittent fasting routines, monitor progress, and analyze health data. It offers educational content, motivational challenges, and a journal to record your feelings. Connect with friends for support and motivation on your wellness journey.
- Fasting timer and tracker
- Progress analytics and history
- Educational 'Know It' section
- Motivational challenges and trophies
- Mood tracker and journal
- Health app integration (steps)
- Fasting buddy feature
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Fast: Fasting Tracker & Timer helps you build consistent fasting habits with flexible fasting plans, body weight logging, water intake tracking, reminders, and detailed progress insights. Whether you're new to intermittent fasting or already following a routine, the app provides the tools to stay organized and work toward your personal health and wellness goals. Choose a fasting plan, customize your schedule, and track every fast in one place with an easy-to-use fasting tracker. FASTING PLANS Find a fasting schedule that works for your lifestyle. Choose from 12:12, 13:11, 14:10, 15:9, 16:8, 17:7, 18:6, 19:5, 20:4, 21:3, 22:2, 23:1, MWF, TTS, or create your own custom fasting plan. Whether you're starting intermittent fasting or maintaining an existing routine, you can choose a plan that suits your goals. FASTING TRACKER & TIMER Track active and completed fasts with an intuitive fasting tracker and timer. Review your fasting history and monitor your consistency over time. BODY WEIGHT & WATER TRACKING Log your body weight and monitor changes throughout your fasting routine. Track your daily water intake to stay hydrated and build healthier habits alongside your fasting schedule. SMART REMINDERS Stay on schedule with fasting reminders and water intake reminders. Customize notifications to help you start and end your fasting window on time while maintaining your daily hydration routine. ANALYTICS & HISTORY Review your fasting sessions, body weight, hydration logs, activity, and history with easy-to-understand analytics that help you monitor your progress and stay consistent. INFORMATIVE BLOGS Learn more about intermittent fasting through informative blogs covering healthy habits, wellness topics, and practical guidance to help you better understand your fasting routine. FASTING BUDDIES Stay motivated by fasting together. Invite friends, track each other's progress, and encourage one another throughout your fasting journey with the Buddy feature. ACTIVITY SUPPORT Sync your activity data to keep your fasting progress and daily activity organized in one place for a more complete overview of your routine. Whether you're following a 16:8 fasting schedule, exploring different intermittent fasting plans, or creating a custom fasting routine, Fast: Fasting Tracker & Timer gives you the tools to stay organized and build lasting healthy habits. DISCLAIMER This app is intended for informational and lifestyle purposes only and does not provide medical advice, diagnosis, or treatment. Consult a qualified healthcare professional before starting any fasting routine, especially if you have an existing medical condition, are pregnant, or have specific dietary requirements. PRIVACY POLICY https://maximaapps.com/fasting/privacy_policy.html TERMS OF USE https://maximaapps.com/fasting/terms-of-use.html GET IN TOUCH Have questions, feedback, or suggestions? We'd love to hear from you. Contact us through the app or email us at feedback@maximaapps.com.
BioAI
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Your calendar age tells you how long you have lived. BioAI helps you explore what your current routines may be building next. Complete a short lifestyle assessment across sleep, movement, nutrition, recovery, and risk exposure. BioAI combines your answers into a transparent wellness-age estimate with a confidence range, ranked lifestyle drivers, and an actionable first-week plan. WHAT YOU GET • An estimated BioAge and range • Your strongest current lifestyle driver • A focused first-week action plan • Weekly check-ins and estimate trends • A source-linked science library OPTIONAL SELFIE, PRIVATE BY DESIGN Add an optional selfie moment to the scan animation. On-device Vision only checks whether one clear face is present. The image is not uploaded, stored, or used in your estimate, and you can continue without a photo. BioAI is a wellness and educational tool. Its estimates are based on self-reported lifestyle inputs, are not a medical diagnosis, and should not replace advice from a qualified health professional. Subscription options and exact local pricing are shown before purchase. Subscriptions renew automatically unless canceled in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is device support: Fast at 3 against BioAI's 1. On price, ads, in-app purchases and iOS requirement 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. Fast sells 8 in-app purchases, starting at $4.99 per month and BioAI sells 2 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.
| Parameter | Fast | BioAI |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3.3K ratings) — better | — |
| Positive reviews | 74.6% of reviews | — |
| Number of ratings | 3.3K — better | — |
| Update frequency | Every 2 months | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone |
| Requires iOS | 18.6 | 18.0 — better |
| Further details — not scored | ||
| Size | 116 MB | 14 MB |
| Age rating | 12+ | 12+ |
| Developer | Maxima Apps | Stuke Digital LLC |
Bugs and requests
Fast
Reported bugs
3 issues- Timer not accurately recording fasting times
- Inability to update weight in app
- Crashing when trying to view friend's status
Requested features
4 requests- Option to edit fasting start/end times
- More detailed analytics and progress tracking
- Improved syncing and data saving reliability
- Expanded customization options
BioAI
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Fast
- Fast Premium Monthly$4.991 Month
- Fasting Monthly$14.991 Month
- Fasting Annually$19.991 Year
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- Fasting Premium$27.993 Months
- Fast Premium Yearly$29.991 Year
- Fasting Premium Yearly$39.991 Year
- Fasting One Time Special Offer$19.99
- Fasting Pro$49.99
BioAI
- Weekly Premium$9.997 Days
- Annual Premium$39.991 Year









