Comparison

LightYet vs WeightTrend

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

LightYet

Features
Read full description

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.

About

WeightTrend

Easily log your daily weight and visualize your progress with clear charts and trends. Understand your body's changes over time without complex analysis. Offers premium features for deeper insights and reminders.

Highlights
  • Log daily weight in seconds
  • View progress with clear charts
  • Track weight trend over time
  • Analyze progress by week, month, year
  • Export data as CSV
  • Add notes to entries
  • Daily reminders
Features
Read full description

WeightTrend is the simplest way to log your weight and understand your real progress. Designed to be fast, clear, and effortless, WeightTrend lets you save your daily weight in seconds and visualize your progress with simple charts, trends, and useful statistics. Weight can change from day to day for many reasons: fluids, food, training, sleep, or stress. That’s why WeightTrend doesn’t focus only on today’s number, but helps you see your real trend over time. Log your weight quickly, check your weekly, monthly, or yearly progress, and better understand how your body is changing without unnecessary screens or confusing analysis. What you can do with WeightTrend: * Log your daily weight in seconds. * View your progress with clear, easy-to-understand charts. * Check your weight trend over time. * Analyze your progress by week, month, or year. * See statistics such as average weight, highest weight, lowest weight, and total change. * Export your data as a CSV whenever you need it. WeightTrend Premium With WeightTrend Premium, you unlock a more complete view of your progress: * Weekly weight change pace. * Projected monthly pace. * Projected yearly pace. * Total absolute change. * Number of weight gain and weight loss days. * Biggest daily increase recorded. * Biggest daily decrease recorded. * Current BMI and starting BMI. * Daily reminders so you never forget to log your weight. * Notes in your entries to better understand what is behind each change. * Add notes to your entries to remember important context, such as workouts, meals, feelings, or changes in your routine. Premium is designed for people who want more context without losing simplicity. More information, with the same clean, fast, and easy-to-use experience. Truly simple WeightTrend was created to be probably the simplest weight tracking app on the market. No noise. No complicated menus. No unnecessary steps. Open the app, log your weight, and see your progress. Ideal whether you are losing weight, building muscle, maintaining your weight, or simply trying to better understand how your body changes over time. WeightTrend does not replace professional medical advice. The metrics and indicators shown are for informational purposes only and should be interpreted as a personal tracking aid. Terms of Use: EULA: https://sites.google.com/view/weighttrendhelp/terms-of-service Privacy Policy: https://sites.google.com/view/weighttrendhelp/privacy-policy

Screenshots

LightYet4 screens
WeightTrend3 screens

Verdict

The call

The clearest difference is update cadence: LightYet at every 4 days against WeightTrend's monthly. LightYet also leads on iOS requirement (17.0 vs 26.5). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. LightYet sells 3 in-app purchases, starting at $2.99 per month and WeightTrend sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

LightYet ships an update every 4 days, WeightTrend monthly. The most recent releases landed on September 20, 2026 and September 17, 2026 respectively.

Scorecard2 real differences · 8 level
LightYet versus WeightTrend: the parameters behind the verdict, then further details
ParameterLightYetWeightTrend
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 4 days — betterMonthly
AdsNoNo
In-app purchasesYesYes
Monetization—Free
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better26.5
Further details — not scored
Size40 MB17 MB
Age rating4+4+
Developer依欢 孙JORGE JUAN MORATE VAZQUEZ

In-app purchases

3 purchases

LightYet

Subscriptions2
  • Monthly$2.991 Month
  • Yearly$19.991 Year
One-time1
  • LightYet-Lifetime$39.99
3 purchases

WeightTrend

Subscriptions2
  • WeightTrend Premium Monthly7 Days trial$0.991 Month
  • WeightTrend Premium Yearly$8.991 Year
One-time1
  • WeightTrend Premium Lifetime$17.99

Questions

Is LightYet free?
LightYet is free to download, with in-app purchases available.
Is WeightTrend free?
WeightTrend is free to download, with in-app purchases available.
Do LightYet or WeightTrend have ads?
Neither LightYet nor WeightTrend shows ads.
Which is updated more often, LightYet or WeightTrend?
LightYet ships an update every 4 days, and WeightTrend monthly. Most recently, LightYet was updated on September 20, 2026 and WeightTrend on September 17, 2026.

Other comparisons