# FastOn — See your fasting from inside

> See your fasting from inside (iPhone/iPad app by Masahiro Akebi.)

- Source: https://appshunter.io/ios/app/faston/id6778654479 (this page in markdown: same URL + `.md`)
- Developer: [Masahiro Akebi](https://appshunter.io/developer/1884865177)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 30 MB
- Languages: American English, Japanese
- Released: 2026-06-14
- Data updated: 2026-06-27
- User reviews in markdown: https://appshunter.io/ios/app/faston/id6778654479/reviews.md

## What is FastOn?

A fasting timer that lets you see what's happening inside your body — even without opening the app.

FastOn helps you keep a 16-hour intermittent fast with a clean, focused timer. It works fully offline, needs no account, and keeps all your data on your device.

VISUALIZE YOUR FAST
As time passes, FastOn shows what's happening inside your body in real time:
Digesting → Blood sugar → Fat burning → Ketosis → Autophagy → Growth hormone → Deep repair
It's not just a countdown — knowing "fat burning starts soon" is what keeps you going.
Tap any stage to learn the science behind it and what benefits to expect.

FREE FEATURES
- Start/stop a fast in one tap (backdate from your last meal)
- Circular timer + real-time body stage
- 16:8 plan
- Streak tracking
- Last 7 days of history
- Water intake tracker
- Mood & energy self-logging
- Confetti celebration + SNS share card on completion

PREMIUM
- All plans (18:6 / 20:4 / OMAD / 5:2 / Custom)
- Home screen Widget + Live Activity (remaining time & stage on Lock Screen and Dynamic Island)
- Full statistics + insights
- AI Advice (personalized tips based on your fasting patterns)
- Weight tracking + goal weight line + HealthKit
- 20 badges / achievements with categories
- CSV data export
- Eating window end & streak crisis notifications
- No ads

NOTE
This app does not provide medical advice. Body-stage information is a general guideline based on common scientific knowledge and varies by individual. If you have a medical condition or are pregnant, please consult your doctor.

SUBSCRIPTION
- Monthly ¥480 / Yearly ¥2,900 (yearly includes a 7-day free trial)
- Payment is charged to your Apple ID at confirmation.
- It renews automatically unless auto-renew is turned off at least 24 hours before the end of the period.
- Manage or cancel in Settings > Apple ID > Subscriptions.

Terms of Use and Privacy Policy are available in the app settings and from the store links.

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium (Monthly) | $2.99 | per month |
| Premium (Yearly) | $17.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Premium (Lifetime) | $22.99 | one-time |



## Version history (last 4 releases)

### 1.1.2 — 2026-06-25

v1.1 Update

- Water tracker — log your hydration on the home screen
- Mood & energy log — track how you feel during fasts
- AI Advice — personalized tips based on your fasting data (Premium)
- 20 badges — organized by category with progress tracking
- Stage details — tap any body stage for science-based info
- Goal weight — see your target line on the weight chart
- Share cards — share your fasting milestones on social media
- CSV export — download your fasting and weight history
- Plus improved notifications, settings, and more

### 1.1.1 — 2026-06-17

Improved search keywords for better discoverability.

### 1.1.0 — 2026-06-17

v1.1 Update

- Water tracker — log your hydration on the home screen
- Mood & energy log — track how you feel during fasts
- AI Advice — personalized tips based on your fasting data (Premium)
- 20 badges — organized by category with progress tracking
- Stage details — tap any body stage for science-based info
- Goal weight — see your target line on the weight chart
- Share cards — share your fasting milestones on social media
- CSV export — download your fasting and weight history
- Plus improved notifications, settings, and more

### 1.0 — 2026-06-14

No release notes.

## More apps by Masahiro Akebi

- [Namikibun - Mood Tracker](https://appshunter.io/ios/app/namikibun-mood-tracker/id6760540305)
- [YaruNavi - AI Task Planner](https://appshunter.io/ios/app/yarunavi-ai-task-planner/id6762136137)
- [Foodie Map - Restaurant Diary](https://appshunter.io/ios/app/foodie-map-restaurant-diary/id6764239126)
- [BeforeGo - Outing Checklist](https://appshunter.io/ios/app/beforego-outing-checklist/id6773306619)
- [Creature Picross](https://appshunter.io/ios/app/creature-picross/id6779810493)

All apps by Masahiro Akebi: https://appshunter.io/developer/1884865177

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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 2026-06-27.*