LightYet vs Weight Tracker
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
LightYet
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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.
Weight Tracker
This app helps you track your weight loss progress by smoothing out daily fluctuations. It displays your trend weight, weekly changes, and allows you to set and monitor your desired pace. Data is stored locally, and premium features offer advanced insights and predictions.
- Trend weight calculation
- Weekly change and rate tracking
- Goal setting and progress monitoring
- Effortless data entry
- Apple Health integration
- Data export (CSV, JSON)
- Local data storage
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Your weight moves from day to day by two or three pounds: water, salt, meals, sleep. That movement is larger than the progress you are looking for. Trendcurve takes it out and shows you the trend underneath, and the date you will reach your goal. FOUR TABS, EACH WITH ONE JOB β’ Today: your trend and today's entries at a glance β’ Goal: forecast, milestones and, in maintain mode, your corridor β’ Analysis: experiments, patterns, balance, calorie budget and body values β’ History: every measurement with chart and trend line β’ Drag cards into your order, hide what you don't need WHAT TRENDCURVE SHOWS β’ Trend weight: the smoothed line instead of today's reading, and you pick the method (exponential, 7 or 14 days, double exponential) β’ 7-day change and weekly rate, so you can see where things are really heading β’ Target rate: planned against measured, with a warning when it gets too fast β’ Goal with progress: lose, gain or maintain, all three built out equally EXPERIMENTS Try a change for a few weeks, for example no alcohol or 16:8. With Pro, Trendcurve compares your weekly rate before, during and after. The numbers show a connection, not a cause. MEDICATION TRACKING If you are on a weekly medication, for example a GLP-1 therapy, every dose change appears as a marker in your history, and a reminder on your injection day lets you check it off. Label and dose stay on your device. Trendcurve gives no recommendations. MAINTAIN WITH A CORRIDOR Reached your goal? Set a corridor around your goal weight as wide as you like. The band in the chart and the status show whether your trend stays inside. LOGGING WITHOUT EFFORT β’ Log your weight in seconds, several values a day if you like β’ Kilograms, pounds or stones, height and body measurements in centimeters or feet and inches β’ Apple Health both ways: read in the background, and written back when you want it β’ Ignore outliers: they stay visible but do not count for the trend β’ Daily reminder that stays quiet once you have weighed in today β’ Share your trend and milestones as an image, free for everyone β’ Widgets for home and lock screen, dark mode, ten languages YOUR DATA STAYS WITH YOU No account, no ads. Your weight and health data live on your device. Export as CSV and JSON at any time, import from Happy Scale, Libra, openScale and Excel. TRENDCURVE PRO Logging, trend, units, history, Apple Health, target rate, reminder, export and sharing stay free, as do experiments and markers, medication tracking with dose markers and weekly reminder, and the corridor band and status. Pro additionally unlocks: β’ Forecast with target date and an honest range, plus the forecast chart β’ Calorie budget from your trend: maintenance, balance and the budget for your target rate β’ Patterns: plateau detection with an explanation and weekday patterns β’ Experiment results: weekly rate before, during and after, with a result to share β’ Weekly rate per dose step, corridor history and early warning β’ Milestones with celebrations β’ Balance over 7, 30 and 90 days and monthly reports β’ Body measurements: waist, hips, chest, body fat β’ Progress photos with before and after comparison β’ Trend restart and chart ranges of one year and longer, also when sharing β’ Automatic iCloud backup, large widgets, multiple reminders with streak protection Trendcurve Pro is available as a monthly subscription ($1.99), a yearly subscription ($11.99 with a 7-day free trial) or a one-time purchase ($29.99). Prices may vary by country. Subscriptions renew automatically at the same price unless cancelled at least 24 hours before the end of the current period. You manage them in your Apple ID settings. NOTE Trendcurve is not a medical device and gives no medical advice. The app records and calculates; it does not interpret. The calorie budget is an estimate based on your own entries and values. Privacy policy: https://trendcurve.app/en/privacy Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: Weight Tracker at every 3 days against LightYet's weekly. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. LightYet sells 3 in-app purchases, starting at $2.99 per month and Weight Tracker sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
LightYet ships an update weekly, Weight Tracker every 3 days. Both last shipped on October 25, 2026.
| Parameter | LightYet | Weight Tracker |
|---|---|---|
| Price | Free | Free |
| Positive reviews | β | 100.0% of reviews |
| Update frequency | Weekly | Every 3 days β better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | β | Free with in-app purchases |
| Devices | iPhone, iPad β better | iPhone |
| Requires iOS | 17.0 | 16.4 β better |
| Further details β not scored | ||
| Size | 39 MB | 80 MB |
| Age rating | 4+ | 12+ |
| Developer | δΎζ¬’ ε | Johannes MΓΌller |
In-app purchases
LightYet
- Monthly7 Days trial$2.991 Month
- Yearly7 Days trial$19.991 Year
- LightYet-Lifetime$39.99
Weight Tracker
- Trendcurve Pro Monthly$1.991 Month
- Trendcurve Pro Yearly7 Days trial$11.991 Year
- Trendcurve Pro Lifetime$29.99







