Comparison

Simple Fasting Timer FastClear vs JustFast

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

Head to head
About

Simple Fasting Timer FastClear

Features
Read full description

FastClear is a simple fasting timer that follows your real rhythm: correct the start time, go past your goal, and see your eating window counted down. Everyone forgets to start the timer sometimes. Just say when you last ate: your fast starts from that moment. THE FULL CYCLE • Fast, goal, time past the goal, then the eating window and your next fast • 16:8, 18:6, 20:4, OMAD or a custom goal from 12 to 72 hours • The goal is a milestone: your fast keeps going until you end it ON YOUR LOCK SCREEN • Live Activity and Dynamic Island, free • Interactive widgets: start and end without opening the app • Control Center control, Siri, Shortcuts and the Action button A HISTORY THAT FITS YOUR LIFE • Edit a fast, or add the one you forgot to time • Weekly list and monthly calendar • Streaks, fasts completed this month, average duration AT THE END OF EVERY FAST • A timeline of your fast, to share as an image if you like HONEST • Milestones (fat burning, ketosis, autophagy) are shown as estimates, with their sources • No weight-loss promises FREE, FOR REAL Every protocol, the Live Activity, 30 days of history and the export of your data are free, with no time limit. Premium adds your full history, in-depth statistics and the widgets: as a monthly or yearly subscription (7-day free trial on the yearly plan, Family Sharing included), or as a one-time lifetime purchase. PRIVACY No tracking. No ads. No account. Your data stays on your device. App Store privacy label: Data Not Collected. FastClear is not medical advice. Ask a health professional before fasting if you are pregnant, diabetic, have a history of eating disorders or take medication. — Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://suiteforge.app/fastclear/privacy/

About

JustFast

This app offers a straightforward intermittent fasting timer. It focuses on tracking your fast with a clear, calm interface, providing insights into metabolic stages without gamification or pressure. It prioritizes privacy with on-device data storage and no accounts.

Highlights
  • One-tap start and stop
  • Live timer with accurate timekeeping
  • Metabolic milestone tracking
  • Plain-language explanations of milestones
  • Adjustable start/stop times
  • Ongoing notification for duration
  • Simple history of past fasts
  • 18 languages and dark design
Features
Read full description

Fasting is a beautifully simple intermittent-fasting timer that does one thing well: it tracks your fast. No goals to hit. No streaks to protect. No accounts, no ads, no clutter. Just tap once to begin, and a calm live timer counts your fast while a glowing ring fills toward the next stage your body moves through. WHY IT'S DIFFERENT Most fasting apps pile on dashboards, reminders, and pressure. This one strips fasting back to its essence — a clear timer you can glance at and put away. It's designed to feel quiet and focused, not gamified. WHAT YOU GET • One-tap start and stop, with a big, satisfying button • A live timer that keeps perfect time across restarts, time-zone changes, and daylight saving • Metabolic milestones — the ring fills toward the next stage (blood sugar settling, glycogen burning, fat burning, ketosis, autophagy, and more) • Tap any milestone for an honest, plain-language explanation of what's happening in your body • Forgot to start the timer? Just tap the ring to fix your start time. Forgot to stop? End your fast at the right time after the fact. • An ongoing notification shows your current duration at a glance • A simple history of past fasts — swipe to delete • 18 languages and a clean dark design HONEST BY DESIGN The milestone descriptions are written plainly and honestly. Where the science is still early or based mostly on animal research, we say so. This app is a timer and an educational companion — not medical advice. PRIVATE BY DEFAULT Your data stays on your device. There are no accounts, no sign-ups, no tracking, and nothing is uploaded. Fasting works for 16:8, OMAD, alternate-day, extended fasts, or any schedule you like — because it never forces a schedule on you. Note: Fasting is not a medical device and does not provide medical advice. Talk to a healthcare professional before starting any fasting regimen, especially if you are pregnant, nursing, taking medication, or have a medical condition.

Screenshots

Simple Fasting Timer FastClear4 screens
JustFast4 screens

Verdict

The call

The clearest difference is in-app purchases: JustFast at none against Simple Fasting Timer FastClear's 3. JustFast also leads on update cadence (fortnightly vs every 3 months). On price, ads, 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. Simple Fasting Timer FastClear sells 3 in-app purchases, starting at $0.99 per month. JustFast asks for nothing beyond the download.

UpkeepUpdate frequency

Simple Fasting Timer FastClear ships an update every 3 months, JustFast fortnightly. The most recent releases landed on November 13, 2026 and November 5, 2026 respectively.

Scorecard2 real differences · 7 level
Simple Fasting Timer FastClear versus JustFast: the parameters behind the verdict, then further details
ParameterSimple Fasting Timer FastClearJustFast
PriceFreeFree
Rating—4.5 (2 ratings) — better
Number of ratings—2 — better
Update frequencyEvery 3 monthsFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhoneiPhone, iPad — better
Requires iOS17.6 — better18.0
Further details — not scored
Size2 MB20 MB
Age rating4+4+
DeveloperNicolas DojcilovicVitalii Vyrodov

In-app purchases

3 purchases

Simple Fasting Timer FastClear

Subscriptions2
  • FastClear Pro Monthly$0.991 Month
  • FastClear Pro Yearly7 Days trial$5.991 Year
One-time1
  • Lifetime Premium$9.99
None

JustFast

No in-app purchases

Questions

Is Simple Fasting Timer FastClear free?
Simple Fasting Timer FastClear is free to download, with in-app purchases available.
Is JustFast free?
JustFast is free to download, with no in-app purchases.
Do Simple Fasting Timer FastClear or JustFast have ads?
Neither Simple Fasting Timer FastClear nor JustFast shows ads.
Which is updated more often, Simple Fasting Timer FastClear or JustFast?
Simple Fasting Timer FastClear ships an update every 3 months, and JustFast fortnightly. Most recently, Simple Fasting Timer FastClear was updated on November 13, 2026 and JustFast on November 5, 2026.

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