Comparison

InterFasting vs Time to fast!

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

Head to head
About

InterFasting

This app helps users succeed with intermittent fasting through scientific and systematic management. It offers AI-powered schedule and calorie recommendations, a simple timer, and comprehensive tracking of fasting hours, meals, workouts, and water intake. Users can visualize progress and receive detailed reports to build healthy habits.

Highlights
  • AI fasting schedule recommendations
  • AI food calorie calculation
  • Intermittent fasting timer
  • Customizable fasting plans
  • All-in-one health tracking
  • Fasting analysis and reports
  • Home screen widget
Features
Read full description

Ready to make intermittent fasting actually work? InterFasting is the smart fasting tracker and fasting timer that helps you stay consistent without extreme dieting. No more guessing, no complicated calorie counting — just smart tools that actually work. Why people choose InterFasting • AI Schedule Recommendations Get a personalized intermittent fasting plan based on your lifestyle — no more trial and error. • AI Calorie Counter & Food Scanner Just snap a photo of your meal. Instantly see calories and macros without manual logging. • The Easiest Fasting Timer Supports 16:8, 5:2, OMAD, and fully custom schedules. Smart alarms keep you on track. • 100% Free Customization + Ad-Free Experience Adjust your fasting windows freely and track everything in a clean, distraction-free interface. • All-in-One Health Tracker Monitor fasting hours, weight progress, meals, workouts, and water intake in one place. • Home Screen Widgets Check your fasting stage and countdown timer instantly from your home screen. • Hour-by-Hour Body Stages See what’s happening in your body during a fast (Ketosis, Autophagy, and more). • Visual Progress & Photo Diary Log meals and take progress photos to stay motivated by real results. Science-backed benefits of intermittent fasting Effective fat burning and weight loss Boosted autophagy and cellular repair Better blood sugar control Reduced inflammation Improved mental clarity and energy Perfect if you want to start intermittent fasting for the first time, stay consistent with a reliable tracker, or combine fasting with keto and healthy weight loss goals. Consistency is the key. InterFasting helps you build habits that last. Download now and start your transformation. *** Apple Health Integration *** Automatically syncs weight, steps, and workout data with the Apple Health app. ABOUT SUBSCRIPTIONS & PAYMENT • Payment will be charged to your Apple ID account at confirmation of purchase. • You can manage or cancel your subscription in your App Store Account Settings at any time. • Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Terms of Service: https://www.interfasting.app/service_en Privacy Policy: https://www.interfasting.app/privacy

About

Time to fast!

Easily monitor your intermittent fasting schedule with a visual 24-hour timeline. Adjust plans, track progress, and receive timely notifications for fasting and eating periods. Save your results and review past fasting records to stay on track with your health goals.

Highlights
  • Circular 24-hour timeline
  • Adjustable fasting plans
  • Save and edit fasting results
  • Past fasting records review
  • Fasting start/end notifications
  • Pre-set fasting plans
Features
Read full description

Easily track your intermittent fasting schedule with a circular 24-hour timeline that clearly shows your fasting and eating periods. Your current status and remaining time are always at your fingertips. You have the flexibility to adjust your fasting plans at any time and save your results once your fasting window is complete. Plus, you can conveniently access your past fasting records! - Simply press the start/stop button to initiate the timer according to your chosen plan. - Modify your fasting plan on the go, even while the timer is running. - Choose from five pre-set fasting plans and set your meal times with ease. - Edit the start time for the current session during your fasting period. - Save and edit your most recent fasting results during your eating window. - If fasting feels too challenging today, use the 'Break the Fast' button to end it early and save your progress. - To begin fasting a bit earlier today during your mealtime, select the 'Start Fast Early' button to adjust your fasting start time for this session. - Review your fasting records for the past week in a graph and track your progress in the calendar alongside your goal achievements. - Enable notifications to receive fasting start/end alerts.

Screenshots

InterFasting4 screens
Time to fast!4 screens

Verdict

The call

The clearest difference is in-app purchases: Time to fast! at none against InterFasting's 5. Time to fast! also leads on ads (none vs shown). InterFasting's advantage is review sentiment (89% vs 71%) and device support (3 vs 1). On price, update cadence 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. InterFasting sells 5 in-app purchases, starting at $3.99 per month. Time to fast! asks for nothing beyond the download.

UpkeepUpdate frequency

InterFasting ships an update every 4 days, Time to fast! every 3 days. The most recent releases landed on October 26, 2026 and October 16, 2026 respectively.

Scorecard5 real differences · 5 level
InterFasting versus Time to fast!: the parameters behind the verdict, then further details
ParameterInterFastingTime to fast!
PriceFreeFree
Rating4.8 (354 ratings) — better—
Positive reviews88.6% of reviews — better71.4% of reviews
Number of ratings354 — better—
Update frequencyEvery 4 daysEvery 3 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPod, Apple Watch — betteriPhone
Requires iOS15.0 — better16.0
Further details — not scored
Size99 MB13 MB
Age rating4+4+
DeveloperLivietEunbee Kang

Customer experience

InterFasting

All ratings348 ratings
Positive95.4%
Neutral1.4%
Negative3.2%
Written reviews70 reviews
Positive88.6%
Neutral2.9%
Negative8.6%

Time to fast!

Written reviews7 reviews
Positive71.4%
Neutral28.6%
Negative0.0%

In-app purchases

5 purchases

InterFasting

Subscriptions4
  • Intermittent Fasting Monthly$3.991 Month
  • Intermittent Fasting Monthly$6.991 Month
  • Intermittent Fasting Annual$12.991 Year
Show 1 more
  • Intermittent Fasting Annual$34.991 Year
One-time1
  • Premium User$12.99
None

Time to fast!

No in-app purchases

Questions

Is InterFasting free?
InterFasting is free to download, with in-app purchases available.
Is Time to fast! free?
Time to fast! is free to download, with no in-app purchases.
Do InterFasting or Time to fast! have ads?
InterFasting shows ads; Time to fast! does not.
Which is updated more often, InterFasting or Time to fast!?
InterFasting ships an update every 4 days, and Time to fast! every 3 days. Most recently, InterFasting was updated on October 26, 2026 and Time to fast! on October 16, 2026.

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