Comparison

FastMode vs ChronoFast AI

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

Head to head
About

FastMode

This app simplifies intermittent fasting with an easy-to-use timer and progress tracking. Monitor your fasting schedule, view statistics, and earn badges to stay motivated on your health journey.

Highlights
  • Simple fasting timer
  • Flexible fasting schedules
  • Progress statistics
  • Milestone badges
  • Apple Health integration
  • Dark mode
Features
Read full description

Start your intermittent fasting journey with FastMode - the simplest fasting tracker to help you reach your goals. Whether you’re new to fasting or already experienced, FastMode makes it easy to track your fasting schedule, monitor your progress, and stay motivated. Why FastMode? Simple and clear - no complicated menus or confusing options. Start your timer, track your progress, achieve your goals. Flexible fasting - choose your own schedule or use popular methods like 16:8, 18:6, or OMAD. Customize it the way you want. Insight into your progress - view detailed statistics, track your longest fasts, and see how many hours you’ve fasted. Celebrate your successes - earn milestone badges when you reach important goals and build your streak. Key Features: • Simple timer - start, pause, and end your fast with one tap • Complete history - see all your fasting sessions in one overview • Apple health • Apple watch • Extensive statistics - total hours fasted, average fasting time, and more • Milestone system - earn badges for special achievements • Dark mode - comfortable use at any time of day • Privacy first - all your data stays safe on your device Perfect for: • Beginners who want to start intermittent fasting • Experienced fasters who want to track their schedule • Anyone looking for a reliable, simple fasting tracker Download FastMode now for free and discover how easy fasting can be! --- FastMode Pro Subscription - Monthly: €2.99 / month - Yearly: €29.99 / year Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage and cancel your subscription in your Apple ID account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://getfastmode.com/privacy

About

ChronoFast AI

This app acts as an AI coach for intermittent fasting, helping users understand if their food intake breaks their fast. It provides detailed metabolic stage information, tracks progress, and offers social features for fasting with friends.

Highlights
  • AI-powered 'Did I Break My Fast?' analysis
  • Live Activity and Dynamic Island integration
  • Detailed metabolic stage tracking with scientific sources
  • Apple Health integration for activity and sleep data
  • AI meal scanning and barcode scanning
  • Social fasting features with friends and leaderboards
Features
Read full description

Most fasting apps are a countdown. ChronoFast AI is a coach that answers the question you actually have at hour 11: does this break my fast? DID I BREAK MY FAST? Type what you had, or snap a photo of it. The AI weighs it against the exact stage your fast is in and gives a straight verdict — Intact, Impacted or Broken — with what it does to insulin, fat burning and autophagy. If it is genuinely broken, one tap ends or restarts the timer. ON YOUR LOCK SCREEN ALL DAY Start a fast and the Live Activity stays with you for the whole thing, drawing the same dial the app does: a ring sweeping through every stage colour, each one checked off as you pass it, with your stage, time elapsed, when the next stage lands and the clock time you finish. Add 250 ml logs your water; End fast opens the app's own confirmation, with undo. The Dynamic Island gives the dial and percentage at a glance, the full status on a press and hold — and one switch in Settings turns it all off. A TIMER THAT SHOWS ITS WORKING • A live dial with your percentage of goal at the centre • A 24-hour band that shows when you eat, and whether your window is drifting later • A named stage track — Fed, Fat Burning, Ketosis, Deep Autophagy — hour-stamped for your plan • Home Screen widgets in two sizes, plus a Lock Screen circular accessory • 12:12 through 20:4, 23:1 OMAD, extended 24h to 72h fasts, or your own custom window • Streak repair: one free rescue a month for a single missed day SCIENCE YOU CAN CHECK Every metabolic stage carries its source — the NEJM fasting review, the Nobel-winning autophagy research — named, dated, and honest where the evidence is still early. The Metabolic Wave glucose curve is clearly labelled as an educational simulation modelled from your clock, never measured from your body. No bro-science, no numbers we cannot know. YOUR ACTIVITY AND SLEEP COUNT With Apple Health connected, ChronoFast reads sleep, resting heart rate, HRV, steps, workouts and active energy, each compared against your own 7-day average. A fasted walk shows as real metabolic progress. A rough night, and the app eases off instead of pushing you to extend. It writes back too — water, weight, nutrition and completed fasts — with a switch for each. FOOD, WATER AND WEIGHT IN ONE PLACE • AI meal scan from a photo, plus barcode scanning for packaged food • Calories and macros on one compact card, with rings that fill as you log • Hydration goal set from your body weight, with reminders that never collide with a stage alert • Weight trend with a projected goal date that shows its confidence band YOU ARE NOT ALONE AT HOUR 16 Fast with buddies added by QR or friend code, see who is fasting right now, send high-fives, join weekly and monthly challenges, log how the fast actually feels on a 1-5 mood scale, and climb a global leaderboard. A shareable weekly recap rolls up your last 7 days. PROGRESS THAT MAKES SENSE A 28-day consistency grid read three ways — fasting, weight and water — a day-by-day log for every metric, and plain-language observations about your last four weeks, each with its evidence. BUILT TO BE TRUSTED 18 languages including full right-to-left Arabic. An adults-only age gate before any health question. A legal centre in plain English, explicit AI-processing consent, and crash reports that never carry your name. Moving phones? Export everything at once. FREE AND PRO The timer, stages, logging, community and daily AI coaching are free. Pro unlocks unlimited AI insights and food scans, all five coach personas, predictive goal dating, the glucose chart and a 100% ad-free app. IMPORTANT ChronoFast AI is for education and general wellness, not a medical device: it does not diagnose, treat or prevent any condition, and AI output can be wrong. Talk to a doctor before fasting if you are pregnant or breastfeeding, under 18, diabetic, on medication, or have a history of disordered eating. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

FastMode4 screens
ChronoFast AI4 screens

Verdict

The call

The clearest difference is ads: FastMode at none against ChronoFast AI's shown. FastMode also leads on update cadence (every 3 days vs every 2 weeks) and device support (4 vs 2). On price, rating, ratings volume 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. FastMode sells 2 in-app purchases, starting at $2.99 per month and ChronoFast AI sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for FastMode against 5.0 for ChronoFast AI. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

FastMode ships an update every 3 days, ChronoFast AI every 2 weeks. Both last shipped on October 24, 2026.

Scorecard4 real differences · 5 level
FastMode versus ChronoFast AI: the parameters behind the verdict, then further details
ParameterFastModeChronoFast AI
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Number of ratings11
Update frequencyEvery 3 days — betterEvery 2 weeks
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad
Requires iOS15.1 — better17.0
Further details — not scored
Size39 MB118 MB
Age rating17+17+
DeveloperBart GoutbeekSoundarya Srinivas

Customer experience

FastMode

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

ChronoFast AI

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

FastMode

Subscriptions2
  • FastMode Pro Monthly$2.991 Month
  • FastMode Pro Yearly$24.991 Year
2 purchases

ChronoFast AI

Subscriptions2
  • ChronoFast-AI-Monthly-Yearly$2.991 Month
  • ChronoFast-AI-Monthly-Yearly$34.991 Year

Questions

Is FastMode free?
FastMode is free to download, with in-app purchases available.
Is ChronoFast AI free?
ChronoFast AI is free to download, with in-app purchases available.
Which has better reviews, FastMode or ChronoFast AI?
FastMode and ChronoFast AI are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do FastMode or ChronoFast AI have ads?
ChronoFast AI shows ads; FastMode does not.
Which is updated more often, FastMode or ChronoFast AI?
FastMode ships an update every 3 days, and ChronoFast AI every 2 weeks. Most recently, FastMode was updated on October 24, 2026 and ChronoFast AI on October 24, 2026.

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