LightYet: Body Fat Tracker

Build a calmer picture of your progress. Log meals by photo, voice, or text; track weight and body fat; and review optional AI estimates before you save.

YOUR PROGRESS IS MORE THAN ONE MEAL OR WEIGH-IN.

LightYet brings your plan, meals, weight, body fat, and progress photos together—so you can see the trend and know what to do next. Build a flexible 7- or 15-day plan, log meals by photo, voice, or text, and review AI estimates before saving.

No account. No ads. No third-party analytics.

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 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

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 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, multiple health profiles, 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/lightyet-privacy/lightyet_privacy.html

Terms of Use: https://sunheihei.github.io/lightyet-privacy/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.