Lean · 薄肌 (also called LumaFit) is an iPhone fitness app. It keeps strength training, calories, water and sleep in one daily view, and makes progress visible with an on-device pull-up counting exam, strength ranks and playful Lean degree certificates. Tagline: Lift. Sip. Sleep. Level up.
Features
| Area | What it does | Free? |
|---|---|---|
| Workout log | Sets, reps, weight, RPE, cardio; plans and manual templates; PRs, muscle coverage, history, export | Free |
| Food | Manual meal log and calorie math by date | Free |
| AI photo calories | Snap or pick a photo; AI estimates food, portion, calories and macros; review before saving | LumaFIT Pro |
| Water & sleep | One-tap water logging; sleep logging with optional Apple Health import | Free |
| Pull-up exam | Live joint-landmark tracking counts full reps; no recording or upload | Free |
| Ranks & degrees | L0 Raw Stone → L6 Neutron Star; Lean Bachelor / Boshi / Lean Postdoc | Free |
| AI coach | Q&A, editable plans, workout debriefs | 2 free chats/day; more with Pro |
Lean degrees
- Lean Bachelor: 6 consecutive bodyweight pull-ups
- Boshi: 15 consecutive reps with a logged weight ≥ 60 kg
- Lean Postdoc: 20 consecutive bodyweight pull-ups
Degrees are in-app entertainment achievements, not academic qualifications.
Privacy
Workout history stays on device by default; iCloud sync is optional. Pose detection is on-device. Online AI requests go through the LumaFit proxy to the official DeepSeek API, only after you consent.
Availability
iPhone, iOS 18 or later. Currently on the China mainland App Store. The app UI is in Chinese and English.
FAQ
Is Lean · 薄肌 the same as LumaFit?
Yes. Lean · 薄肌 is the App Store name; LumaFit is the English brand, and the subscription is LumaFIT Pro.
Is Lean free?
Yes — every non-AI feature is free, plus 2 AI text chats per day.
Is there an Android version?
Not yet. Lean is iPhone-only for now.