Comparison

InterFasting vs InOut

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

InOut

This app offers a comprehensive approach to dieting with features like automatic calorie calculation, AI coaching, and a supportive community. Track your meals, workouts, and progress with personalized insights and motivational tools.

Highlights
  • Automatic calorie and nutrient calculation
  • AI-powered personalized coaching and reports
  • Workout and meal logging with photo support
  • Community feed for sharing progress and support
  • Gamified challenges and point system
  • Customizable health habit reminders
  • Intermittent fasting schedule management
Features
Read full description

A diet routine that's actually fun! Quick logging, an AI coach, a supportive community, and game-like motivation — everything a dieter needs, all in one place. Start your diet journey with INOUT today. ■ Smarter, Simpler Dieting with AI - Snap a photo of what you ate and AI measures portions, analyzes nutrients, and logs it for you - Log your workout by weight, sets, reps, or time — AI organizes it and calculates calories burned - Get feedback, meal recommendations, and workout routines from your personal AI diet coach ■ Set Your Diet Goals - Choose the diet type that fits you — Standard, Fitness, Keto, Vegan, and more - Get the ideal carb/protein/fat ratio for your plan - Compare your goal with intake and calories burned to see how much more you can eat ■ Complete Missions, Earn Points, Decorate Your App - Complete daily missions to earn "Apples," INOUT's points - Use Apples to buy items and customize your screen - Build your own "My Room" with hundreds of items and show it off ■ Diet Together, Cheer Each Other On - Share meals, recipes, daily life, workouts, progress photos, and motivation on your feed - Get healthy inspiration from others' diet logs ■ "Diet Battle" — From Sharing to Competing - Start a healthy competition with friends - Everyone's logs — meals, weight, workouts — are shared in real time ■ Cute Daily Notes with Your Own Sticker Diary - Log your mood, sleep, bowel movements, period, and more with cute stickers - Write your own diary entries for more detail ■ Simple Health Tracking — Weight, Water, Supplements, Condition - Log your weight daily and see changes at a glance - Track water intake, supplements, and today's condition ■ Automatic Fasting Schedule - Set your target fasting time for automatic start/end alerts - New to fasting? Follow the guide and try intermittent fasting step by step ■ See Your Body's Changes at a Glance - View weight changes by meals, workouts, and fasting in one graph - Track changes over time with clean graphs and stats - See detailed calorie/nutrient info by day, week, or month ■ Build Healthy Habits with Custom Reminders - Set your own reminders and get notified at your chosen times Consistent logging is the shortcut to diet success! Start your journey with INOUT. —- The following permissions are needed for smooth app use *Optional permissions ■ Camera: To take and upload photos for meals, the community, and more. ■ Photos/Media/Files: To upload photos from your phone for meals, the community, and more. ■ Health (HealthKit): To import your weight, workout, and step count data. *You can still use the app without optional permissions, minus the related features —- INOUT includes subscription purchases. Your Apple account is charged upon purchase confirmation. The new-user discount continues at renewal, but resubscribing after cancellation is charged at the regular price. Cancel up to 24 hours before the period ends, or the subscription auto-renews. Manage or cancel your subscription in your Apple Account. For minors, this confirms a legal guardian consented to the subscription and payment. Terms of Paid Service: https://mynormal.notion.site/Plus-21bc7f5bffa180b980e9cd5c67b03d71?pvs=73 Privacy Policy: https://mynormal.notion.site/20fc7f5bffa1806c8ed0e387ec2b6041?pvs=73

Screenshots

InterFasting4 screens
InOut4 screens

Verdict

The call

InterFasting and InOut both sit at 4.8 stars, but that hides the real split: 89% of InterFasting's written reviews are positive against 71% of InOut's. On price, rating, ratings volume and update cadence 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 and InOut sells 33 in-app purchases, starting at $7.59 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for InterFasting against 4.8 for InOut. Both are backed by a comparable volume of ratings — 359 and 554 respectively. Written reviews are what separate them: 89% of InterFasting's written reviews are positive against 71% of InOut's.

UpkeepUpdate frequency

InterFasting ships an update every 4 days, InOut weekly. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

Scorecard1 real difference · 9 level
InterFasting versus InOut: the parameters behind the verdict, then further details
ParameterInterFastingInOut
PriceFreeFree
Rating4.8 (359 ratings)4.8 (554 ratings) — better
Positive reviews88.6% of reviews — better70.7% of reviews
Number of ratings359554 — better
Update frequencyEvery 4 days — betterWeekly
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPod, Apple Watch — betteriPhone, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size99 MB179 MB
Age rating4+4+
DeveloperLivietMynormal Company

Customer experience

InterFasting

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

InOut

All ratings535 ratings
Positive94.8%
Neutral3.0%
Negative2.2%
Written reviews99 reviews
Positive70.7%
Neutral14.1%
Negative15.2%

Bugs and requests

InterFasting

Not enough reviews yet to summarise bugs or requests.

InOut

Reported bugs

5 issues
  • Messaging issues in group chats
  • Inconsistent recording of exercise data
  • Unreliable group battle point tracking
  • Problems with fasting timer and habit reminders
  • Data loss and login issues for some users

Requested features

6 requests
  • Add language options for non-Korean users
  • Improve exercise tracking features
  • Integrate with fitness trackers/smartwatches
  • Enhance food database and search functionality
  • Add more customization options for the app
Show 1 more
  • Improve syncing and data management for overseas users

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
33 purchases

InOut

Subscriptions22
  • 인아웃 Plus - 월간 구독 (스타터)$7.591 Month
  • 인아웃 Plus - 월간 구독 (스타터)$7.991 Month
  • 인아웃 Plus - 스타터 월간 구독1 Month trial$7.991 Month
Show 19 more
  • 인아웃 Plus - 월간 구독 (일반)$8.991 Month
  • 인아웃 Plus - 월간 구독$8.991 Month
  • INOUT Monthly Membership$9.991 Month
  • INOUT Monthly Membership3 Days trial$9.991 Month
  • 인아웃 Plus - 월간 구독 (일반)5 variants$9.991 Month
  • 인아웃 Plus - 연간 구독 (특가)$19.991 Year
  • 인아웃 Plus - 연간 구독 (특가)$25.901 Year
  • 인아웃 Plus - 연간 구독 (특가)$26.901 Year
  • INOUT Annual Membership$26.991 Year
  • INOUT Annual Membership3 Days trial$26.991 Year
  • 인아웃 Plus - 연간 구독 (스타터)2 variants$46.491 Year
  • 인아웃 Plus - 연간 구독 (일반)$46.901 Year
  • 인아웃 Plus - 연간 구독 (스타터)$46.991 Year
  • INOUT Annual Membership$48.991 Year
  • INOUT Annual Membership3 Days trial$48.991 Year
  • 인아웃 Plus - 연간 구독 (일반)2 variants$49.991 Year
  • 인아웃 Plus - 스타터 연간 구독1 Year trial$49.991 Year
  • 인아웃 Plus - 연간 구독 (일반)$53.991 Year
  • 인아웃 Plus - 연간 구독$53.991 Year
One-time11
  • 200 Apples$0.99
  • 200 Apples$1.49
  • 400 Apples$2.49
Show 8 more
  • 400 Apples$2.99
  • 700 Apples$3.99
  • 700 Apples$4.49
  • 1000 Apples2 variants$5.99
  • 1300 Apples$6.99
  • 1300 Apples$7.49
  • 1600 Apples$8.49
  • 2000 Apples$8.99

Questions

Is InterFasting free?
InterFasting is free to download, with in-app purchases available.
Is InOut free?
InOut is free to download, with in-app purchases available.
Which has better reviews, InterFasting or InOut?
InOut is rated higher. InterFasting averages 4.8 out of 5 from 359 ratings, while InOut averages 4.8 from 554 ratings.
Do InterFasting or InOut have ads?
Both InterFasting and InOut show ads.
Which is updated more often, InterFasting or InOut?
InterFasting ships an update every 4 days, and InOut weekly. Most recently, InterFasting was updated on October 29, 2026 and InOut on October 30, 2026.

Other comparisons