# InterFasting: Fasting Timer — Easy & Free Fasting Timer App

> AI-powered intermittent fasting tracker and timer with health logging. (iPhone/iPad app by Kim Yunhoo.)

- Source: https://appshunter.io/ios/app/interfasting-fasting-timer/id1467464443 (this page in markdown: same URL + `.md`)
- Developer: [Kim Yunhoo](https://appshunter.io/developer/1464827169)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Rating: 4.80/5 from 235 App Store ratings · 39 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 85 MB
- Languages: Korean, German (Germany), Russian, Malay, Vietnamese, European Spanish, American English, Italian, Japanese, Chinese (Simplified, China) and 2 more
- Released: 2019-06-16
- Data updated: 2026-08-25
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/interfasting-fasting-timer/id1467464443/reviews.md

## What is InterFasting?

Want to succeed with intermittent fasting and achieve your weight loss goals? 
Meet InterFasting—the ultimate AI-powered intermittent fasting tracker and smart diet companion trusted by millions worldwide!

Instead of just starving yourself, InterFasting helps you build sustainable, healthy habits through scientific, data-driven, and systematic health management. 
Start your smart wellness journey with the highest-rated fasting app on the App Store.

■ WHY CHOOSE INTERFASTING?

[NEW] INTRODUCING INTERFASTING AI
• AI Schedule Recommendations: No more guessing! Our advanced AI automatically analyzes your lifestyle to recommend the perfect, customized intermittent fasting plan.
• AI Calorie Counter & Food Scanner: Simply snap a photo of your meal. The AI instantly calculates calories and macros to effortlessly log and manage your diet.

THE EASIEST INTERMITTENT FASTING TIMER
• Supports all popular fasting methods including 16:8, 5:2, OMAD (One Meal a Day), and custom circadian rhythm schedules.
• Receive smart, timely alarms for your fasting start and end times. (※ Please enable notification settings!)

100% CUSTOMIZABLE & AD-FREE FASTING
• Adjust your fasting times and schedules completely free.
• Track, edit, and manage your personalized fasting plan with a clean, ad-free interface.

ALL-IN-ONE HEALTH & WEIGHT TRACKER
• Monitor everything in one place: fasting hours, weight loss progress, meal logs, workout activity, and daily water intake.

SCIENTIFIC FASTING ANALYSIS & REPORTS
• Access detailed body statistics, fasting history, and meal calorie data.
• Stay motivated with comprehensive weekly and monthly progress reports.

CONVENIENT HOME SCREEN WIDGETS
• Check your current fasting stage, countdown timer, and control your status instantly right from your home screen.

HOUR-BY-HOUR BODY STAGES INFO
• Learn what happens inside your body during a fast (Ketosis, Autophagy, etc.). Understanding these metabolic changes is the key to long-term success.

VISUAL PROGRESS & PHOTO DIARY
• Log your meals and take "Eye Body" progress photos. Seeing your physical transformation over time is the ultimate motivation to keep going!

■ THE SCIENCE-BACKED BENEFITS OF FASTING
• Effective Weight Loss & Fat Burn: Target stubborn body fat and optimize metabolism.
• Boosted Autophagy & Cellular Repair: Enhance cellular health and longevity.
• Improved Blood Sugar Control: Increase insulin sensitivity and manage glucose levels naturally.
• Reduce Inflammation: Lower oxidative stress and support your body’s natural detox.
• Enhanced Mental Clarity: Experience razor-sharp brain function and steady energy levels.

■ PERFECT FOR ANYONE WHO WANTS TO:
• Try intermittent fasting for the first time and need a beginner-friendly guide.
• Stay accountable with a systematic, automated fasting tracker.
• Achieve healthy weight loss, keto diet goals, or better metabolic health.
• Stop struggling with complex calorie counting and manual meal logging.

The secret to a successful lifestyle change is consistency. InterFasting is here to help you build healthy habits that last.

Download InterFasting now and unlock your healthy transformation!

*** APPLE HEALTH INTEGRATION ***
InterFasting seamlessly integrates with the Apple Health app to automatically sync and track your weight, steps, and workout data.

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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_en

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Gandan Premium Annual | $12.99 | per year |
| Premium 1 month | $3.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Premium User | $12.99 | one-time |


## Recent user reviews (10 of 39)

All indexed reviews: https://appshunter.io/ios/app/interfasting-fasting-timer/id1467464443/reviews.md

### 5/5 — 이제까지 잘 쓰고 있었습니다.

*2025-06-21*

그런데 어느 순간부터 징그러운 광고가 뜹니다.
손바닥 위에 무슨 카피바라? 지비츠가 엄청 많이 있는 건데 저만 징그럽다고 생각하는 건지 궁금하여 다른 사람들께도 여쭤보니 저만 생각하는 게 아니더군요.
심지어 단식과는 전혀 연관성도 없는 창이라 볼 때마다 들어가기 꺼려집니다.

**Developer response:** 안녕하세요 5다인님.
우선 불편드려서 정말 죄송합니다..
해당 부분 광고 확인해서 바로 안뜰 수 있도록 조치하겠습니다!
알려주셔서 감사합니다!!ㅠㅠ

—추가 답변—-
간단은 앱 광고 자동 시스템을 사용하고 있습니다
최근 테무에서 광고 클릭 유도하도록 그런 광고를 노출하는걸 알게됐어요ㅠㅠ
그래서 앱에서 전부 차단 완료했습니다!!!

### 5/5 — 간단앱 시작! 조금 아쉬운점^^

*2025-06-14*

안녕하세요. 오늘 부터 간헐적 단식을 하려고 하는데요. 앱 관련 추가 하면 좋을 것 같아서 문의 드려봐요. 저는 인바디와 핏빗을 같이 사용하고 있는데요. 애플워치 한가지만 호환이되서 아쉽더라구요. 앱을 이용할때 관련 호환되는 기계들에 종류가 다양하면 앱을 더 완벽하게 사용할 듯 합니다.

### 5/5 — お願いします

*2025-06-11*

断食の時間設定を1分単位で決められるようにして欲しいです。

**Developer response:** こんにちは。まずはレビューを残していただき、ありがとうございます。
「体重」タブ → 設定アイコンを選択すると、体脂肪率（％）に切り替えることができます！

### 5/5 — 유용함

*2025-02-19*

간식 섭취를 건강하게 관리할 수 있는 유용한 앱입니다. 간식 시간을 기록하고, 그에 대한 정보를 체크하는 기능이 정말 편리해요. 간단한 인터페이스와 알림 기능 덕분에 간식 관리가 쉬워졌고, 나의 건강을 좀 더 잘 챙길 수 있게 되었어요. 꾸준히 사용하면서 목표를 달성하는 재미도 있습니다. 정말 유용하고 실용적인 앱이에요!

**Developer response:** 안녕하세요 창섭이님!
좋은 리뷰와 칭찬 정말 감사합니다ㅠㅠ
앞으로도 간단은 더욱 정진해 더 좋은 서비스로 보답하겠습니다!!
행복하세요!!

### 5/5 — 다이어트하면서 체크하기 아주 좋아요!!!

*2025-02-06*

기존에도 간헐적 단식을 계속 했었는데 그때는 기록이고 뭐고 없이 그냥 16시간 공복유지만 하는 것만 신경썼는데 이 어플을 사용하고는 시간관리뿐만 아니라 식단. 운동. 수분을 관리하면서 체크를 할 수 있어서 너무 좋은거 같아요
식단도 그냥 내가 먹은 거 사진으로 찍으면 칼로리도 계산해주고 다이어트하면서 도움을 받을 수 있어서 너무 좋은 어플인거 같아요!!!!!👍🏻

**Developer response:** 안녕하세요 우선 좋은 리뷰남겨주셔서 감사해요~~

항상 더 노력하는 간단되겠습니다😊😊

행복한 한해 보내세요!!

### 4/5 — いいけど、、

*2024-09-23*

18にアップデートしたらロック画面に今まで断食の時間だったり断食終わってからの時間とか表示されてたのに急に表示されなくなった🥲過ごす時間表示助かってたからどうにかして欲しい、、

**Developer response:** レビューを残してくださってありがとうございます。
18バージョンで正常に動作するようにエラーを修正しました。
バグのレポーティングありがとうございます。

### 5/5 — 필요한 기능이 있고 차트 보기 좋아요

*2024-07-10*

저탄고지식의 식단을 하며 칼로리보다는 체중이나 식단 구성 자체가 중요해서 식단 이미지와 체중, 체중의 변화를 볼 수 있는 차트가 핵심인 앱이 필요했고, 잘 쓰고 있어요. 기존의 다이어트 앱서비스는 칼로리나 운동량 기록에 집중되어 있는 경우가 많아서 조금 복잡하고 기록하기 귀찮아 늘 쓰다가 삭제했어요. 간단은 무료시절부터 쓰기 시작해서 유료 전환까지하고꾸준하게 사용 중입니다. 

간헐적 단식+저탄고지 하는 다이어터들에게 딱 좋아요. 군더더기 없이 필수요한 기능이 잘 구현되어있고 무엇보다 기간별 차트 보기가 편해서 잘 사용하고 만족하고 있습니다

데이터 백업 문제로 고객센터 연락했을 때도 빠르게 잘 처리해주셔서 너무 감사했습니다.

**Developer response:** 안녕하세요! 소중한 리뷰 남겨주셔서 진심으로 감사드립니다. 😊 저탄고지식의 식단과 간헐적 단식을 병행하시는 다이어터분들께 도움이 될 수 있어 정말 기쁩니다. 말씀해주신 것처럼 간단한 사용성과 체중 변화 차트 등 필수 기능에 집중하여 앱을 설계한 만큼, 사용자분께서 만족해주셔서 보람을 느낍니다. 데이터 백업 문제를 빠르게 해결해드릴 수 있어 다행입니다. 앞으로도 더 편리하고 유용한 서비스 제공을 위해 노력하겠습니다. 꾸준히 사용해주셔서 감사드리며, 언제든 문의 사항이 있으면 말씀해주세요! 😊

### 5/5 — 너무 좋은 어플입니다! 결제 내역 불러오기만 작동했으면 좋겠네요 ㅠ

*2024-06-26*

어플을 안드로이드 시절부터 너무 잘 쓰고있었습니다.
핸드폰을 바꾸게되어 아이폰으로 바꿨는데
결제내역을 불러와도 아무 반응이없고 불러와지지 않습니다.(sns계정 연동했습니다. 카카오톡)
 
예전에 안드로이드에서 잘 활용했어서 아이폰에서도 잘 쓰고싶은데.. ㅜㅜ 아쉽습니다.

### 1/5 — Clean but Unintuitive

*2024-06-06*

For you to start and end fasting, you have to go to schedule for the fast and adjust the day and time. Instead of just being able to tap and start/end/log the fasting. There is a fine line between smart engineering and overengineering. This is over engineered and unpleasant to use.

**Developer response:** Thank you for your feedback!

You can actually set the start and end times for your fast directly on the fasting tab. If you click the timer or select your fasting duration, you can change it right away.

Please give it a try!

### 5/5 — 원래 리뷰 안 쓰는데

*2024-05-16*

이건 진짜 칭찬받으셔야할 것 같아서 씁니다 단식 어플 중 가장 간단하게 볼 수 있고 사용법도 쉬워서 오래 사용할 것 같아 유료로도 결제했어요 그런데 위젯으로 볼 수 없는게 아쉬워 고객센터에 건의했더니 바로 위젯추가 기능을 넣어주셨네요! 사용자 입장을 신경써주시는 것 같아 정말 기분이 좋았습니다

**Developer response:** 안녕하세요,

소중한 리뷰와 칭찬 감사드립니다! 저희 서비스를 이용해 주시는 모든 분들의 의견을 소중히 여기고 있습니다. 고객님의 소중한 건의를 바탕으로 위젯 추가 기능을 빠르게 개발해 드릴 수 있어서 정말 기쁩니다. 이제 위젯을 통해 더 편리하게 앱을 사용하실 수 있을 거예요!

앞으로도 고객님의 편의를 위해 더 나은 기능을 추가해 나가겠습니다. 저희 앱을 오랫동안 사랑해 주셔서 감사드리며, 앞으로도 저희 서비스를 이용하시는 동안 편안한 사용자 경험을 제공하기 위해 최선을 다하겠습니다.

추가적인 의견이나 질문이 있으시면 언제든지 연락 주세요. 다시 한 번 감사드리며, 고객님의 말씀이 큰 힘이 됩니다.

감사합니다.

고맙습니다

## Frequently asked questions about InterFasting

### What does SimFast do?

SimFast is an intermittent fasting app designed to help users succeed with their fasting goals. It provides tools like an AI-powered fasting schedule recommender, a food calorie calculator by photo, and a simple fasting timer. The app also allows users to track various health metrics and offers detailed reports on their progress.

### What are the key features of SimFast?

Key features include AI-driven recommendations for fasting schedules and calorie calculations, support for various fasting methods with smart alarms, unlimited custom fasting plans, and an all-in-one health tracker for fasting hours, weight, meals, workouts, and water intake. It also offers fasting analysis, reports, a home widget, and insights into the body's changes during a fast.

### Is SimFast free to use?

The app offers a free version with unlimited custom fasting plans and no ads. However, it also has in-app purchases, suggesting that some advanced features or content may require payment.

### What devices is SimFast compatible with?

The application description mentions integration with the Apple Health app, indicating compatibility with iOS devices. Users should check their respective app store for specific device and operating system requirements.

### How can SimFast help with weight loss and health?

SimFast supports weight loss by helping users burn body fat and prevent excess fat storage through consistent intermittent fasting. It also promotes a boosted metabolism, improved blood sugar control, detoxification, reduced inflammation, and enhanced mental clarity, contributing to an overall healthier lifestyle.

## Version history (last 5 releases)

### 3.324 — 2026-08-19

InterFasting has been updated!
-The fasting status page has been renewed for a more comfortable experience
- The fasting schedule page has been renewed for a more comfortable experience.
- Editing and ending fasting times is now more convenient.
- Fixed a widget time error.

We'll continue to work hard to ensure you have a smooth fasting journey!

### 3.323 — 2026-08-14

InterFasting has been updated!
-The fasting status page has been renewed for a more comfortable experience
- The fasting schedule page has been renewed for a more comfortable experience.
- Editing and ending fasting times is now more convenient.
- Fixed a widget time error.

We'll continue to work hard to ensure you have a smooth fasting journey!

### 3.322 — 2026-08-10

InterFasting has been updated!
- The fasting schedule page has been renewed for a more comfortable experience.
- Editing and ending fasting times is now more convenient.
- Fixed a widget time error.

We'll continue to work hard to ensure you have a smooth fasting journey!

### 3.321 — 2026-08-06

InterFasting has been updated!
-The fasting status page has been renewed for a more comfortable experience
- The fasting schedule page has been renewed for a more comfortable experience.
- Editing and ending fasting times is now more convenient.
- Fixed a widget time error.

We'll continue to work hard to ensure you have a smooth fasting journey!

### 3.320 — 2026-08-04

InterFasting has been updated!
-The fasting status page has been renewed for a more comfortable experience
- The fasting schedule page has been renewed for a more comfortable experience.
- Editing and ending fasting times is now more convenient.
- Fixed a widget time error.

We'll continue to work hard to ensure you have a smooth fasting journey!

## Apps similar to InterFasting

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Zero: Fasting & Food Tracker](https://appshunter.io/ios/app/zero-fasting-and-food-tracker/id1168348542) | 4.8 (445,252) | Free | Health & Fitness |
| [Fasting + Intermittent Fasting](https://appshunter.io/ios/app/fasting-plus-intermittent-fasting/id1455022660) | 4.8 (6,799) | Free | Health & Fitness |
| [Fasting App: Tracker & Timer](https://appshunter.io/ios/app/fasting-app-tracker-and-timer/id6470460463) | 4.7 (5,440) | Free | Health & Fitness |
| [Intermittent Fasting Tracker!](https://appshunter.io/ios/app/intermittent-fasting-tracker/id1576351038) | 4.6 (332) | Free | Health & Fitness |
| [Intermittent Fasting Tracker -](https://appshunter.io/ios/app/intermittent-fasting-tracker/id1498018285) | 4.9 (28,786) | Free | Health & Fitness |
| [Intermittent Fasting Tracker:](https://appshunter.io/ios/app/intermittent-fasting-tracker/id6448909309) | 4.9 (50,359) | Free | Health & Fitness |

## More apps by Kim Yunhoo

- [인물퀴즈 국기 퀴즈 - 다양한 퀴즈를 풀어보세요](https://appshunter.io/ios/app/id1464827170)
- [하루 세개 - 심플한 하루 계획](https://appshunter.io/ios/app/id1464837929)
- [눈코입퀴즈](https://appshunter.io/ios/app/id1465070276)
- [오늘의 운동 -  운동일지 운동기록 헬스루틴 헬스기록](https://appshunter.io/ios/app/id1470548485)
- [테이크 - 영양제 약 알림 챙겨먹기](https://appshunter.io/ios/app/id1472974351)

All apps by Kim Yunhoo: https://appshunter.io/developer/1464827169

## Related topics

[free fasting app timer](https://appshunter.io/ios/topics/free-fasting-app-timer) · [simple weight loss calendar](https://appshunter.io/ios/topics/simple-weight-loss-calendar)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*