Comparison

Fastory vs I Fast Different

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

Head to head
About

Fastory

This app offers personalized intermittent fasting guidance with an AI coach that analyzes your health data. It provides tailored insights, progress tracking, and flexible fasting timers to help you build healthy habits. Integrates with Apple Health and offers convenient widgets for at-a-glance updates.

Highlights
  • Personal AI Coach
  • AI insights after each fast
  • Flexible fasting timer
  • Weight & BMI tracking
  • Daily journal
  • Apple Health integration
  • Home Screen widgets
Features
Read full description

Fastory is intermittent fasting with a personal AI coach — not generic articles, but advice written from YOUR data. Start a 7-day free trial. WHY FASTORY • Personal AI Coach — chat anytime. It reads your fasting history, weight trend, hydration and journal, then answers in your language. • AI insight after every fast — a tailored takeaway the moment you finish, powered by GPT, not a canned tip. • Weekly & Monthly AI Reviews — your progress recapped with concrete next steps. TRACK EVERYTHING • Flexible fasting timer with stages — 14:10, 16:8, 18:6, 20:4, OMAD, 36h or custom. • Goal-reached celebration, eating-window reminders and smart stage notifications. • Weight & BMI tracking with goal progress and clean charts. • Daily journal — mood, body symptoms, meals, photos and notes. • Stats — total fasting hours, streaks, mood trends and pattern insights. • Guided programs (7-day, 28-day, OMAD) to build the habit. • 53 achievements and tier badges to keep you going. WORKS WITH APPLE HEALTH Two-way sync for weight, hydration, steps, sleep and activity, so your fasting data lives alongside the rest of your health. AT A GLANCE — NO NEED TO OPEN THE APP • Home Screen widget — your fasting progress, right on your iPhone home screen. • Lock Screen Live Activity & Dynamic Island — watch the timer tick in real time without unlocking. • Start and end a fast straight from the widget. ON YOUR WRIST • Full Apple Watch app — start, watch and end a fast from your wrist. • Watch-face complication — your fast on your watch face, always visible. PREMIUM Fastory Premium unlocks the Personal AI Coach, AI reviews, pattern insights, unlimited history, advanced charts, custom protocols, guided programs, 16 app icons and data export. Try it free for 7 days, then $6.99/month or $39.99/year. Cancel anytime. Subscriptions auto-renew unless turned off at least 24h before the period ends. Manage or cancel in your App Store account settings. Privacy Policy: https://you-447015.web.app/privacy Terms: https://you-447015.web.app/terms

About

I Fast Different

This app offers a unique intermittent fasting approach by alternating shorter and longer fasting periods. It provides a clear countdown, flexible control over your fasts, and detailed logs and statistics to help you track your progress. Designed for privacy, your data remains on your device.

Highlights
  • Alternating fast cycles
  • Live progress countdown ring
  • Flexible start and mid-fast control
  • Detailed logging and calendar view
  • Statistics and streak tracking
  • Customizable reminders
  • Apple Watch integration
Features
Read full description

Most intermittent fasting apps lock you into the same eating window every day. I Fast Different takes a different approach: it alternates a shorter fast and a longer fast on a repeating cycle — a style many people find easier to sustain than a fixed 16:8 or 18:6 schedule. Set your two durations once. The app alternates them automatically, keeps your schedule on track, and keeps a clear countdown front and center. FEATURES • Alternating cycle — define a shorter and a longer fast; the app alternates them and shows what's coming up next. • Live progress ring — a clean countdown to your target that keeps counting in overtime when you go past your goal. • Flexible start — fast by duration, or to a target end date and time. • Full control mid-fast — complete, cancel, adjust the length, edit the start time, or reset at any point. • Log and calendar — review every session in a list or month calendar, with completion percentage and notes; fix a past session's times if you forget to stop. • Statistics and streaks — monthly completion rate, total time fasted, average fast length, and your current and best day streak. • Reminders — optional chimes at the halfway point, every 25%, a set time before the end, or at completion. • Auto-schedule — optionally start and stop fasts automatically on the right days. • Apple Watch app and complication — start, stop, and adjust from your wrist, with a glanceable ring on your watch face. • Backup and restore — move all your data between devices with a simple export and import. • Private by design — your data stays on your device. No account, no sign-in, no tracking. I Fast Different is a tracking tool, not medical advice. Consult a healthcare professional before changing your eating patterns, especially if you have a medical condition.

Screenshots

Fastory4 screens
I Fast Different4 screens

Verdict

The call

The clearest difference is in-app purchases: I Fast Different at none against Fastory's 2. Fastory's advantage is iOS requirement (15.1 vs 17.0). On price, rating, ratings volume and ads 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. Fastory sells 2 in-app purchases, starting at $6.99 per month. I Fast Different asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Fastory against 5.0 for I Fast Different. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Scorecard3 real differences · 6 level
Fastory versus I Fast Different: the parameters behind the verdict, then further details
ParameterFastoryI Fast Different
PriceFreeFree
Rating5.0 (1 ratings)5.0 (2 ratings)
Number of ratings12 — better
Update frequencyEvery 9 days—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPod, Apple WatchiPhone, iPad, Apple Watch
Requires iOS15.1 — better17.0
Further details — not scored
Size99 MB6 MB
Age rating17+4+
DeveloperPhonthip SatthabunLeft To My Own Devices Computer Solutions

Customer experience

Fastory

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

I Fast Different

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

In-app purchases

2 purchases

Fastory

Subscriptions2
  • Fastory Premium Monthly$6.991 Month
  • Fastory Premium Annual7 Days trial$39.991 Year
None

I Fast Different

No in-app purchases

Questions

Is Fastory free?
Fastory is free to download, with in-app purchases available.
Is I Fast Different free?
I Fast Different is free to download, with no in-app purchases.
Which has better reviews, Fastory or I Fast Different?
Fastory and I Fast Different are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do Fastory or I Fast Different have ads?
Neither Fastory nor I Fast Different shows ads.

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