LightYet: Body Fat Tracker
Weight Loss & Food Diary
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Track weight and body fat. Log meals by photo or voice, review calorie estimates, and share your progress. No account needed.
TRACK WEIGHT. FOLLOW BODY FAT. LOG FOOD FASTER.
LightYet helps you keep weight, body fat, meals, calorie estimates, and progress photos in one private diary. Take a food photo or describe what you ate, review the AI-estimated calories, and edit your meal record before saving.
No account is required. No ads or third-party analytics.
WEIGHT & BODY-FAT TRACKER
- Log weight in kg or lb
- Record body-fat percentage and personal notes
- Follow 7-day, 30-day, and 90-day trends
- Use moving averages to understand the broader trend
- Estimate progress toward your target weight
- Check BMI using international and regional reference standards
- Import weight, body fat, and height from Apple Health
- Write new LightYet records to Apple Health when enabled
AI MEAL SUPPORT
- Take a photo of a meal or describe what you ate by text or voice
- Get an AI estimate of the foods, portions, and calories
- Ask about ingredients, portions, combinations, preparation, or eating out
- Review and edit the estimate before saving it to your meal diary
- Add or edit meals manually whenever you prefer
AI NUTRITION PLAN
Answer 10 questions about your goals, schedule, food preferences, activity, and challenges. LightYet creates a flexible 7- or 15-day nutrition plan with an estimated daily calorie target, meal guidance, food examples, calorie ranges, and photo tips. Follow the plan at your own pace, ask about a meal, and adjust it to real life.
AI WELLNESS Q&A & BODY-TREND REVIEW
Ask practical questions about food, calories, training, recovery, weight, or body-fat trends. LightYet uses the context you choose to share to provide a focused answer and useful follow-up questions.
Bring recent meal records together with your 7-day and 30-day weight trends. Get a clear summary and one practical next step instead of reacting to a single meal or weigh-in.
VISUAL PROGRESS DIARY
Add progress photos, browse your timeline, and compare two dates side by side. See changes that the scale may not show clearly.
MORE WAYS TO STAY CONSISTENT
- Build a daily logging streak and unlock achievements
- Set daily reminders when you want a gentle nudge
- Read a built-in nutrition science guide
- View weight, calorie, body-fat, goal, streak, dashboard, and calendar summaries with Home Screen widgets
- Export or import weight data as CSV and archive progress photos when needed
LIGHTYET PRO
Unlock every day in your 7- or 15-day nutrition plan, expanded AI meal support and wellness guidance, unlimited progress photos, optional iCloud sync, and additional widgets for body fat, calories, dashboards, and the weight calendar. Monthly, yearly, and lifetime purchase options may be available in your region.
PRIVACY WITH CLEAR CHOICES
Your core records and progress photos remain under your control. LightYet does not require an account and contains no advertising or third-party analytics SDKs.
Non-AI records are stored on your device. If you enable iCloud sync, supported data is stored in your private iCloud container.
AI features are optional. Only after you agree and request an AI feature, selected information needed for that request may be sent to LightYet's AI processing service. Depending on the feature, this may include a meal photo or description, your question, and relevant profile, weight, body-fat, or calorie summaries. Progress photos are not included in AI body trend reviews.
AI estimates can be inaccurate and should be reviewed before saving. Nutrition targets are planning estimates, not medical prescriptions. LightYet is not a medical device and does not replace professional medical advice.
Privacy Policy:
https://sunheihei.github.io/app-policie/lightyet_privacy.html
Terms of Use:
https://sunheihei.github.io/app-policie/lightyet_terms.html
Terms of Use (EULA):
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Download LightYet and turn everyday records into a clearer picture of your progress.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
This update makes logging and reviewing progress smoother:
- Improved meal-photo handling and clearer error messages.
- Refined scanning effects and simplified the calorie review screen.
- Fixed shaded areas in weight and body-fat trend charts.
- Polished the colors of shareable progress posters.
The developer, 依欢 孙, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 依欢 孙
- Size
- 41.3 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 9 more
- English, Dutch, French, German, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- LightYet-Lifetime $39.99
- Yearly $19.99
- Monthly $2.99
- Copyright
- © 2026 LightYet