Comparison

Fasta vs JustFast

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

Head to head
About

Fasta

Features
Read full description

Fasta is a private intermittent fasting timer for a routine that fits your life. Choose a daily fasting window, track water and personalize Today. No account. No ads. Start with a useful free timer and core fasting records stored on your device. YOUR TIMER, YOUR PACE Choose a daily preset or custom window. See elapsed time, keep water and optional weight logs, and look back at your saved history. Stage estimates describe elapsed time, not a measurement of your body. MAKE TODAY YOURS Choose a Simple, Balanced or Detailed layout. Pin your favorite cards, hide what you do not need or use weight-free mode. Pick a coach tone and check-in preferences. Name your companion plant and choose its pot and scene. Breaks do not reduce its health. A MOMENT TO PAUSE Choose free one-, three- or five-minute breathing or reflection, or try self-paced grounding. Adjust the breathing pace, pause whenever you need and choose an optional reminder. Mindful moments do not require a fast. YOUR NEXT WEEK Compare saved activity from two complete weeks, then explore a seven-day schedule around your days. The comparison and editable preview are free. Saving and using the schedule requires Premium, a safety review and your confirmation. A schedule never starts a fast automatically. SAVE YOUR SETUP Save, preview and share routine configurations for free. Shared links include only the routine name, schedule and appearance, not health records, profile or purchase data. Recipients review a preview before choosing whether to apply it. Applying a weekly schedule requires Premium and safety review. FREE TO START The timer, daily presets, free one-week schedule starters, static weekly templates, basic weekly recap, Time Capsule, Year in Review, hydration, optional weight, basic history and safety settings are free. So are Today personalization, companion preferences, mindful moments and an optional first week of prompts to explore Fasta at your own pace. Apple Health weight/water sync and Restore Purchases are available without an account. SMALL MOMENTS, RECOGNISED Eight new trophies recognise mindful moments, check-ins, personal choices, saved routines and exploring your first-week guide. Choose animated, quiet or no celebrations, with optional haptics. Any days count; there is no streak to protect. FASTA PREMIUM Premium adds editable weekly fasting schedules, the private on-device coach, 30-day reports and CSV exports, premium themes and premium timer styles. Choosing a coach tone does not unlock Premium coach features. Local prices and subscription terms appear before purchase. Any trial depends on the selected store offer and your eligibility. APPLE WATCH, WIDGETS, AND HEALTH Stay oriented from your wrist, widgets, Lock Screen or Live Activity. Apple Health is optional. With permission, Fasta can read weight, water, sleep, HRV, resting heart rate, steps, active energy and blood glucose as logged context, and write water and weight entries you log in the app. Logged context is not a health or fasting-safety assessment. PRIVATE BY DESIGN Fasta uses local device storage. Your core fasting data stays on your device unless you choose to export or share it. You control optional health permissions. IMPORTANT Fasta is for general wellness and fasting habit support, not medical advice. If you are pregnant, under 18, have a medical condition, have a history of disordered eating, or are unsure whether fasting is appropriate for you, speak with a qualified health professional first. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ SHARE FEEDBACK Tell us what would make Fasta more useful from Settings. Your email app opens a draft with only the text you write; you choose whether to send it.

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

Fasta4 screens
JustFast4 screens

Verdict

The call

The clearest difference is in-app purchases: JustFast at none against Fasta's 2. Fasta's advantage is iOS requirement (15.1 vs 18.0). On price, update cadence, 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. Fasta sells 2 in-app purchases, starting at $7.99 per month. JustFast asks for nothing beyond the download.

UpkeepUpdate frequency

Fasta ships an update every 2 weeks, JustFast fortnightly. The most recent releases landed on September 24, 2026 and August 27, 2026 respectively.

Scorecard2 real differences · 7 level
Fasta versus JustFast: the parameters behind the verdict, then further details
ParameterFastaJustFast
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 2 weeksFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPod, Apple Watch — betteriPhone, iPad
Requires iOS15.1 — better18.0
Further details — not scored
Size74 MB20 MB
Age rating17+4+
DeveloperOneCount Pty LtdVitalii Vyrodov

In-app purchases

2 purchases

Fasta

Subscriptions2
  • Fasta Premium$7.991 Month
  • Fasta Premium7 Days trial$49.991 Year
None

JustFast

No in-app purchases

Questions

Is Fasta free?
Fasta is free to download, with in-app purchases available.
Is JustFast free?
JustFast is free to download, with no in-app purchases.
Do Fasta or JustFast have ads?
Neither Fasta nor JustFast shows ads.
Which is updated more often, Fasta or JustFast?
Fasta ships an update every 2 weeks, and JustFast fortnightly. Most recently, Fasta was updated on September 24, 2026 and JustFast on August 27, 2026.

Other comparisons