# Fasting Notebook — Intermittent fast timer & log

> Intermittent fast timer & log (iPhone/iPad app by Hyunjin Jang.)

- Source: https://appshunter.io/ios/app/fasting-notebook/id6818532649 (this page in markdown: same URL + `.md`)
- Developer: [Hyunjin Jang](https://appshunter.io/developer/6814767316)
- Category: Health & Fitness, Lifestyle
- Price: Free
- Age rating: 12+
- Requires: iOS 15.5 · 29 MB
- Languages: American English, Japanese, Korean
- Released: 2026-10-30
- Data updated: 2026-10-31

## What is Fasting Notebook?

Tap Start fast, and the timer counts your fasted time from that moment.
Fasting Notebook is a timer and log for intermittent fasting. Set a goal of up to 7 days. When you pass the goal, the timer keeps counting until you end the fast. You do not need an account. Install it and start.

■ Undo a wrong tap
• Started by mistake? Undo it right after you tap Start fast
• Ate a while ago? Choose “Already started” to begin 15 minutes, 30 minutes, 1 hour or 2 hours back
• During a fast, you can change the start time and the goal
• Forgot to end a fast? Fix the end time afterward
• Delete a fast you started by mistake with “Delete without logging”
• Ended a fast too early? Tap Resume to keep counting the fast you just ended

■ From 12:12 to one meal a day, up to 7 days
• Plans for 12:12, 14:10, 16:8, 18:6, 20:4, one meal a day (23:1), and 36, 48 and 72 hours
• Set your own length, or time a fast without a goal
• New to fasting? Answer three questions to see a recommended plan
• Schedule fasts for every day, certain weekdays or every few days, with reminders for 5:2 low-calorie days
• Goals longer than 24 hours ask for your confirmation before you start

■ See which hour you are on
• A ring divided into stage ranges, with your elapsed time
• Time left to your goal, and time past it
• Each stage has reference information to read. It is not medical advice

■ Lock Screen and Home Screen widgets
• The widget shows your elapsed time without opening the app
• During a fast, a Live Activity appears on the Lock Screen and in the Dynamic Island. You can turn it off in Settings

■ Log and stats
• A calendar of your fasts and your streak
• Stats for 7, 30 and 90 days: average and longest fast, goal completion rate and mood
• Log weight, body fat and muscle mass, with charts
• Body photos collected by date, so you can compare them
• Carry over the days and fasting hours you built in another app

■ Meals, exercise and water
• Log breakfast, lunch, dinner and snacks with calories, carbs, protein, fat and sugars for each food, plus amount, photo and note
• Foods you eat often are remembered, so you can add them with a tap
• Log exercise from 10 types. Calories used are estimated from your weight and the intensity
• Log water, tea, coffee and sparkling water, with a daily water goal you set
• See calories eaten, estimated calories used in exercise and nutrient shares in Stats
• Calories are estimates, worked out from the profile and weight you enter with a standard formula

■ Reminders
• When you reach your goal, 1 hour before it, when a scheduled fast starts, and when you forgot to start
• Reminders to drink water and to log your weight
• “Send test notification” checks that reminders reach you

■ No account. Your logs stay on your device.
• Your fasts, meals, weight and photos are saved only on this device
• Save everything, photos included, to a backup file and restore it on a new device. You can also export CSV for spreadsheets
• Health app sync works only when you turn it on. Weight, water and exercise are exchanged with Apple Health, and permission is requested when you turn it on
• Choose a 12-hour or 24-hour clock
• App lock with a PIN or Face ID
• There are no in-app purchases

■ Please read
Stage descriptions are for reference and are not medical advice. Calories are estimates. If you are pregnant or nursing, have a medical condition or take medication, talk to your doctor before you start. The app is not meant for people under 18. If you feel dizzy or notice anything unusual, stop right away. Use it at your own pace.

Contact: fasting@hyunjins.co.kr

## Is Fasting Notebook safe?

Not enough ratings yet to assess Fasting Notebook.

## Is Fasting Notebook legit?

Fasting Notebook appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Fasting Notebook is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 0.1.12 — 2026-10-31

After starting 16:8 on the first screen, the app now shows how to change the start time.
Backup file names now follow the app language.
Temporary files left after sending a backup are removed, and backup files are checked before restoring.

### 0.1.11 — 2026-10-30

Now available in English and Japanese. The app and its notifications follow your device language.

### 0.1.10 — 2026-10-29

몇 가지 문제를 고쳤어요.

### 0.1.9 — 2026-10-17

- 기록 달력의 날짜 칸에 그날 단식한 시간이 보이고, 달력 아래에 그달 요약이 나와요.
- 통계에서 이번 달 평균 단식 시간을 지난달과 견줘 볼 수 있어요.
- 백업 파일을 보냈는지 알 수 없을 때는 잘 저장했는지 한 번 더 물어봐요.

### 0.1.8 — 2026-10-15

- iPad 에서도 넓은 화면에 맞춰 쓸 수 있어요.
- 가장 큰 글자에서도 화면이 잘리지 않게 고쳤어요.

## More apps by Hyunjin Jang

- [실봄 - 청약알림·실거래가 지도](https://appshunter.io/ios/app/id6815459973)
- [Lift Diary](https://appshunter.io/ios/app/lift-diary/id6815556661)
- [TodayCheck: To-Do & Habits](https://appshunter.io/ios/app/todaycheck-to-do-and-habits/id6815557153)
- [Get Up Already: Mission Alarm](https://appshunter.io/ios/app/get-up-already-mission-alarm/id6815557452)
- [Month to Month: Period Log](https://appshunter.io/ios/app/month-to-month-period-log/id6821908963)

All apps by Hyunjin Jang: https://appshunter.io/developer/6814767316

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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 2026-10-31.*