Comparison

Fasting Timer vs Fasting Clock

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

Fasting Clock

Features
Read full description

Start a fasting timer, close the app, and trust the number when you come back. FastTrkr tracks your intermittent fasting window — 16:8, 14:10, 12:12, 18:6, 20:4 or OMAD — shows elapsed time against your target, then counts down the eating window that follows. Most fasting apps want your email, your weight, your meal photos and a coaching plan. FastTrkr is the opposite: a precise fasting clock with an honest log. The timer is anchored to your iPhone's continuous system clock, so elapsed time stays correct through reboots, timezone changes and clock adjustments. And it records the hours that actually ran — end at 15.2 hours and the log says 15.2, never a rounded-up target. WHAT YOU GET • Open the app 14 hours into a 16:8 and "14:22:07 of 16h" is already on the ring — the clock kept counting while the app was closed • End the fast and an eating-window countdown takes its place, so you know dinner has to land inside the next 7 hours 40 minutes • One local reminder fires the minute your window completes — no fast quietly stretching to 19 hours because you forgot it was running • A day streak, windows-met total and lifetime fast count sit under the ring every time you open the app • Tapped End by accident at hour 3? Edit the start and end times and the session is corrected, with a note field for how it felt • A 14-day bar chart shows your recorded fasting hours at a glance PERFECT FOR • 16:8 beginners who want one number, not a lifestyle program • OMAD and 20:4 practitioners who need a timer that takes long windows seriously • Anyone who quit a fasting app because it demanded an account and a weigh-in first • Shift workers whose windows move — custom hour targets when the standard presets don't fit WHY NOT JUST USE THE CLOCK APP? A plain timer forgets everything when it ends, loses your fast when the phone reboots, and knows nothing about eating windows. FastTrkr survives a reboot mid-fast, logs every session to an editable history, keeps your streak, and tells you when the eating window closes — things a stopwatch will never do. PRIVATE BY DEFAULT No account, no analytics, no ads, no server. Every session is stored on your iPhone and the app works fully offline. Nothing you record ever leaves the device. FastTrkr is a timer, not medical advice. Fasting is not suitable for everyone — read the in-app safety guidance and talk to a clinician if you are unsure. FULL ACCESS FastTrkr Pro unlocks the extended protocols — 18:6, 20:4, OMAD and custom targets up to 23 hours — plus the 14-day hours chart. Choose a weekly or yearly subscription, or a one-time lifetime purchase. Start your first 16:8 tonight — by breakfast the ring will tell you exactly where you stand. Terms of Use: https://leanstudio.asia/terms-of-use Privacy Policy: https://leanstudio.asia/privacy-policy Support: support@leanstudio.asia

Screenshots

Fasting Timer4 screens
Fasting Clock4 screens

Verdict

The call

The clearest difference is in-app purchases: Fasting Clock at none against Fasting Timer's 2. Fasting Clock also leads on ads (none vs shown). Fasting Timer's advantage is update cadence (every 3 days vs every 4 months). On price, device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Fasting Timer sells 2 in-app purchases, starting at $1.99 per month. Fasting Clock asks for nothing beyond the download.

UpkeepUpdate frequency

Fasting Timer ships an update every 3 days, Fasting Clock every 4 months. Both last shipped on October 31, 2026.

Scorecard3 real differences · 7 level
Fasting Timer versus Fasting Clock: the parameters behind the verdict, then further details
ParameterFasting TimerFasting Clock
PriceFreeFree
Rating3.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 3 days — betterEvery 4 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better17.0
Further details — not scored
Size51 MB3 MB
Age rating4+4+
DeveloperBatuhan SenavciLEAN ASIA CO., LTD

In-app purchases

2 purchases

Fasting Timer

Subscriptions2
  • Premium Monthly3 Days trial$1.991 Month
  • Premium Yearly$14.991 Year
None

Fasting Clock

No in-app purchases

Questions

Is Fasting Timer free?
Fasting Timer is free to download, with in-app purchases available.
Is Fasting Clock free?
Fasting Clock is free to download, with no in-app purchases.
Do Fasting Timer or Fasting Clock have ads?
Fasting Timer shows ads; Fasting Clock does not.
Which is updated more often, Fasting Timer or Fasting Clock?
Fasting Timer ships an update every 3 days, and Fasting Clock every 4 months. Most recently, Fasting Timer was updated on October 31, 2026 and Fasting Clock on October 31, 2026.

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