Comparison

Fasty vs JustFast

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

Head to head
About

Fasty

This app offers a straightforward and privacy-focused way to track intermittent fasting. It provides tools for timing fasts, monitoring weight and BMI, and maintaining progress streaks without requiring sign-up or displaying ads.

Highlights
  • One-tap fasting timer
  • Multiple fasting programs
  • Custom fast durations
  • Weight tracking
  • BMI tracking
  • Progress and streak tracking
  • Ad-free experience
Features
Read full description

Fasty – The Simplest Way to Track Your Fast No ads. No sign up. Just fasting. Fasty is the most minimal, privacy-friendly intermittent fasting tracker on the App Store. Whether you’re just getting started or deep into your fasting journey, Fasty helps you stay consistent—without distractions or data collection. No accounts. No emails. No tracking—except your fasts (and your weight, if you want). What You’ll Get: - One-tap fasting timer - Tons of different fasting programs - Custom Fast Durations - Simple weight tracking - Easy BMI Tracking - Streaks & progress tracking - Clean, distraction-free design - Absolutely no ads Whether you’re doing a 16:8 fast, OMAD, or something custom, Fasty makes it easy to stay on track with your health goals—without giving up your privacy. Fasting doesn’t have to be complicated. Download Fasty and keep it simple. Our app uses the accepted BMI formula of BMI = kg/m2 more info can be found here: https://www.heartfoundation.org.au/bmi-calculator Terms Of Use can be found at: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://www.termsfeed.com/live/05dde8a0-027e-412a-91ba-690f48580523

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

Fasty3 screens
JustFast4 screens

Verdict

The call

The clearest difference is in-app purchases: JustFast at none against Fasty's 3. JustFast also leads on update cadence (fortnightly vs every 9 months) and rating (5.0 vs 4.7). Fasty's advantage is ratings volume (1.5K vs 1) and iOS requirement (16.5 vs 18.0). On price, ads 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. Fasty sells 3 in-app purchases, starting at $9.99 per 7 days. JustFast asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

JustFast holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Fasty has 1.5K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Fasty ships an update every 9 months, JustFast fortnightly. The most recent releases landed on October 20, 2026 and October 14, 2026 respectively.

Scorecard6 real differences · 4 level
Fasty versus JustFast: the parameters behind the verdict, then further details
ParameterFastyJustFast
PriceFreeFree
Rating4.7 (1.5K ratings)5.0 (1 ratings) — better
Positive reviews7.7% of reviews—
Number of ratings1.5K — better1
Update frequencyEvery 9 monthsFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.5 — better18.0
Further details — not scored
Size5 MB20 MB
Age rating4+4+
DeveloperGabe RogersVitalii Vyrodov

Customer experience

Fasty

All ratings1,526 ratings
Positive91.2%
Neutral5.4%
Negative3.3%
Written reviews13 reviews
Positive7.7%
Neutral7.7%
Negative84.6%

JustFast

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

In-app purchases

3 purchases

Fasty

Subscriptions3
  • Weekly$9.997 Days
  • Monthly$24.991 Month
  • Annual7 Days trial$34.991 Year
None

JustFast

No in-app purchases

Questions

Is Fasty free?
Fasty is free to download, with in-app purchases available.
Is JustFast free?
JustFast is free to download, with no in-app purchases.
Which has better reviews, Fasty or JustFast?
JustFast is rated higher. Fasty averages 4.7 out of 5 from 1.5K ratings, while JustFast averages 5.0 from 1 ratings.
Do Fasty or JustFast have ads?
Neither Fasty nor JustFast shows ads.
Which is updated more often, Fasty or JustFast?
Fasty ships an update every 9 months, and JustFast fortnightly. Most recently, Fasty was updated on October 20, 2026 and JustFast on October 14, 2026.

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