# Linn: Protein & Fasting — Fasting · protein · rings

> Fasting · protein · rings (iPhone/iPad app by 钊 邓.)

- Source: https://appshunter.io/ios/app/linn-protein-and-fasting/id6813356438 (this page in markdown: same URL + `.md`)
- Developer: [钊 邓](https://appshunter.io/developer/1208415342)
- Category: Health & Fitness, Food & Drink
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.4 · 61 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, Japanese, Korean, Brazilian Portuguese, Chinese (Simplified, China), Mexican Spanish and 1 more
- Released: 2026-09-22
- Data updated: 2026-09-25

## What is Linn?

Linn is a body-composition app for women who want to look defined — not simply smaller. It does not push you to eat less; it helps you keep three things steady.

· Gentle fasting: tap once to start, the timer counts up, end whenever you like. Presets of 12:12 / 14:10 / 16:8 / 18:6, with a two-hour shorter suggestion in the luteal phase.
· Protein and balance: snap a photo or write one line and the AI breaks out calories, protein, carbs, fat and fibre per item, then adds one sentence without judgement — "Balanced. Protein's there, vegetables are a bit light."
· Four rings: fasting, protein, water, movement. Close three of four and the day counts as steady. We count steady days, never kilos lost.

Also inside:
· Log a drink: water, coffee and bubble tea all count as fluid; sugary ones are counted separately, with no pop-up and no lecture.
· Check-ins: resistance training and steps can be ticked automatically from the Health app.
· Weight: only the 7-day average, with period ranges marked — daily swings are noise.
· Share cards: four rings, a photo and one line — completion only, never the numbers.
· Widgets and Lock Screen: the fasting timer runs on its own and tells you "you can eat at 17:15". Under the rings it says "28 g to go", not a number you have to work out yourself.
· Apple Watch: see how long is left, log water, check in, or end a fast from your wrist.

Your data stays on your phone. No account, no leaderboard, weight is always private. Cycle data is used on-device only, to work out the phase.

Linn Pro (auto-renewing subscription, monthly or yearly; the price shown in your region's App Store applies; the yearly plan includes a 7-day free trial): unlimited photo reviews, full history, AI touch-up for shared photos, a custom protein factor and more habits. Payment is charged to your Apple ID at confirmation of purchase and renews automatically unless cancelled at least 24 hours before the period ends; manage it in your App Store account settings.
Terms of use: https://boji-web.limitless-ai.workers.dev/legal/terms
Privacy policy: https://boji-web.limitless-ai.workers.dev/legal/privacy

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| 薄肌女孩 Pro 年付 | $49.99 | per year |
| 薄肌女孩 Pro 月付 | $9.99 | per month |


## Is Linn safe?

Not enough ratings yet to assess Linn.

## Is Linn legit?

Linn: Protein & Fasting has limited verification signals. The AppsHunter Legitimacy Score for Linn is 50 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-09-22

No release notes.

## More apps by 钊 邓

- [Simul: Live Captions](https://appshunter.io/ios/app/simul-live-captions/id6812948307)

All apps by 钊 邓: https://appshunter.io/developer/1208415342

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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 2026-09-25.*