Comparison

Fasting Timer vs Fast12

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

Head to head
About

Fasting Timer

Effortlessly track intermittent fasting with this powerful app. Monitor fasting phases, including fat-burning and autophagy, and build healthy habits with various fasting plans. Start your journey in seconds with no account required.

Highlights
  • Circular countdown timer
  • Real-time fasting phase tracking
  • Multiple IF protocols
  • Streak tracking
  • Body Map visualization
  • Home Screen Widget
  • Zone notifications
Features
Read full description

Fasting Timer is a simple intermittent fasting tracker. Start a fast with one tap, see which stage you are in, and look back on every fast. No account, no quiz: open the app and start. FREE • 14:10 and 16:8 timer with a stage ring and countdown • Live Activity on the Lock Screen and in the Dynamic Island while you fast (supported iPhones) • History calendar for the last 7 days: edit start and end times, delete a fast or add one you forgot • End-of-fast summary with mood and a short note • Streaks, a weekly progress chart and badges • Water tracker • Reminders: fast complete, time to start, streak at risk • Dark and light themes PREMIUM • All plans: 18:6, 20:4, OMAD (23:1), 5:2 (mark your two low-calorie days), 36 h, 48 h, 72 h and custom fasts up to 168 hours • "In your body now" cards for each stage of your fast, with sources from peer-reviewed research • Learn library of short articles (a few are open to everyone, including "Who shouldn't fast") • Full history and detailed progress: longest fast, average, completion rate and a monthly heat map • Weight log in kg or lb, with a chart • Apple Health: read and save your weight, and optionally save water • Home Screen and Lock Screen widgets • Extra reminders: one hour before your goal, eating window closing, stage milestones • No ads PRIVATE BY DESIGN No account or sign-up. Your fasts, notes and weight are stored on your device. The free version shows ads; Premium removes them. NOT MEDICAL ADVICE Fasting Timer is a tracking tool, not medical advice. Talk to your doctor before fasting, especially before longer fasts or if you are pregnant or breastfeeding, have diabetes or another medical condition, or have a history of eating disorders. SUBSCRIPTION Premium is an auto-renewing subscription. The price and any free trial are shown in the app before you buy. Payment is charged to your Apple Account when you confirm the purchase. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. You can manage or cancel it in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://ralf9090.github.io/fasting-timer/privacy.html

About

Fast12

Build a sustainable fasting routine with a simple timer and personalized coaching. Track your fasting window, hydration, and sleep to understand your body's rhythms. Features AI meal scanning and meal guidance to support your eating window.

Highlights
  • Simple fasting timer
  • Beginner-friendly 12-hour fast
  • Smart fasting insights
  • Personal coaching
  • Hydration tracking
  • AI Meal Photo Scanner
  • Apple Watch support
Features
Read full description

Fast12 helps you build a simple, sustainable fasting routine - starting with the easiest win: a 12-hour overnight fast. Close the kitchen at night, wake up feeling more in control, and build a healthy rhythm without extreme diets, complicated meal rules, or constant calorie maths. Whether you are new to intermittent fasting or want a calmer way to stay consistent, Fast12 gives you the tools to track your fasting window, understand your body, and make better daily choices. WHY FAST12? • Simple fasting timer Start, pause, complete and track your fasting windows with a clear, easy-to-use timer. • Beginner-friendly 12-hour fasting Fast12 is built around a gentle overnight fasting routine, helping you create consistency before chasing longer fasting windows. • Smart fasting insights See how your sleep, hydration, weight, energy and fasting habits connect over time. • Personal coaching Get guidance designed to help you improve your routine, stay consistent, and understand what may be affecting your progress. • Hydration tracking Log water, set daily goals, and spot when thirst may be mistaken for hunger. • Sleep and recovery insights Understand how sleep quality may influence cravings, energy and fasting consistency. • Ai Meal Photo Scanner Snap a quick photo to automatically estimate calories and log your daily meals. • Meal guidance Access fasting-friendly meal ideas and fast-breaking guidance to support your eating window. • Progress and streaks Build momentum with streaks, milestones and progress tracking that help you stay motivated. • Apple Watch support Track your fast from your wrist and keep your routine visible throughout the day. • Widgets, Live Activities and Dynamic Island Follow your fasting progress from your Home Screen, Lock Screen or Dynamic Island. • Privacy-first by design Your health and fasting data stays on your device. No account required. FASTING MADE SIMPLE Fast12 is not about perfection. It is about building one repeatable habit: finish eating, rest, sleep, and start again in the morning. Use Fast12 to: • Track 12:12, 14:10, 16:8 and other fasting schedules • Log meals instantly with AI photo scanning • Reduce late-night snacking • Build a consistent eating rhythm • Monitor hydration, sleep, energy and weight trends • Understand your fasting phases • Stay motivated with streaks and achievements • Get personalised insights based on your routine • Use Apple Watch, widgets and Live Activities for easy tracking BUILT FOR REAL LIFE Many fasting apps focus on advanced fasting windows, strict challenges or complicated routines. Fast12 is designed for people who want a simpler first step. Start with a realistic overnight reset. Build consistency. Then adjust your fasting schedule when you are ready. IMPORTANT HEALTH INFORMATION Fast12 is a wellness and habit-tracking app. It does not provide medical advice, diagnosis or treatment. Intermittent fasting is not suitable for everyone, including some people who are pregnant, breastfeeding, under 18, underweight, have a history of eating disorders, or have certain medical conditions. Speak to a qualified healthcare professional before starting intermittent fasting, changing your diet, or using Fast12 for weight management. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://fast12.d-app.online/privacy.html

Screenshots

Fasting Timer4 screens
Fast124 screens

Verdict

The call

The clearest difference is review sentiment: Fast12 at 100% against Fasting Timer's 0%. Fast12 also leads on ads (none vs shown). Fasting Timer's advantage is update cadence (every 3 days vs every 10 days) and iOS requirement (16.0 vs 26.0). On price, in-app purchases, monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Fasting Timer sells 2 in-app purchases, starting at $1.99 per month and Fast12 sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Fasting Timer ships an update every 3 days, Fast12 every 10 days. Both last shipped on October 31, 2026.

Scorecard4 real differences · 6 level
Fasting Timer versus Fast12: the parameters behind the verdict, then further details
ParameterFasting TimerFast12
PriceFreeFree
Rating3.0 (2 ratings) — better—
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings2 — better—
Update frequencyEvery 3 days — betterEvery 10 days
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS16.0 — better26.0
Further details — not scored
Size51 MB29 MB
Age rating4+17+
DeveloperBatuhan SenavciD App Online Ltd

Customer experience

Fasting Timer

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Fast12

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Fasting Timer

Subscriptions2
  • Premium Monthly3 Days trial$1.991 Month
  • Premium Yearly$14.991 Year
2 purchases

Fast12

Subscriptions2
  • Fast12 Premium Monthly$12.991 Month
  • Fast12 Premium Annual7 Days trial$49.991 Year

Questions

Is Fasting Timer free?
Fasting Timer is free to download, with in-app purchases available.
Is Fast12 free?
Fast12 is free to download, with in-app purchases available.
Do Fasting Timer or Fast12 have ads?
Fasting Timer shows ads; Fast12 does not.
Which is updated more often, Fasting Timer or Fast12?
Fasting Timer ships an update every 3 days, and Fast12 every 10 days. Most recently, Fasting Timer was updated on October 31, 2026 and Fast12 on October 31, 2026.

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