onTrack vs Simple Weight Log
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
onTrack
Effortlessly monitor your daily active and resting calorie burn, and track your food intake against personalized targets. Stay motivated with customizable home screen widgets that display your progress at a glance.
- Automatic activity and calorie syncing
- Monitor burned calories with progress bars
- Track consumed calories and meal targets
- Home screen widgets for instant data view
- Customizable graph and widget colors
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OnTrack is a calorie tracking app that works best with Apple Watch and Apple Health. It automatically syncs your activity and calorie data to help you stay on top of your fitness goals. Whether you’re training for performance or just staying active, OnTrack provides intuitive insights that keep you motivated and informed every step of the way. Daily Activity Effortlessly monitor your daily activity, calorie burn, and more through dynamic progress bars and weekly charts. See how your current totals compare against your goals with real-time updates and personalized visuals. Apple Watch users will benefit from the most accurate tracking, making OnTrack a powerful tool for understanding your energy expenditure. Meal Logging Track your daily intake and see how your meals stack up against your targets. Weekly consumption graphs help visualize trends, while simple summaries highlight how close you are to reaching your calorie goals each day. Widgets Stay motivated with powerful widgets that bring your data to your Home Screen and Lock Screen. Instantly view daily activity stats all without opening the app. Widgets are color-coded and customizable (with upgrade), keeping your progress front and center throughout the day. Customization Make your experience your own by purchasing color customization for graphs and widgets for $6.99. Personalize metric colors, heatmap themes, and widget backgrounds across the app and your widgets. Match your style and stay motivated.
Simple Weight Log
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Simple Weight Log lets you record your daily weight in about three seconds. No judgment, no pressure, no lectures — just your numbers, shown clearly. ■ A 3-second daily routine The app opens straight to a number pad with your last weight already filled in. Adjust with the +0.1 / -0.1 buttons and save — done. One entry per day; saving again on the same day simply overwrites it. No account, no setup. ■ Trend chart with moving averages View your weight as a line chart over 1 month, 3 months, 1 year, or all time. Overlay 7-day and 30-day moving averages to smooth out day-to-day fluctuations (like water weight) and see the gentle underlying trend. ■ Day-to-day change, streak, and BMI The home screen shows the change from the previous day and your recording streak. Set your height to see your BMI and a reference standard weight (based on BMI 22) — shown as reference values only. ■ A goal, expressed in numbers Set a target weight and date to see the required pace (kg per week), your progress, and a projection based on your pace so far. It works the same whether your goal is to lose or to gain. If the pace exceeds 1% of your body weight per week, the app shows a gentle caution note. ■ Home Screen and Lock Screen widgets Your latest weight and 7-day change on Home Screen widgets (small and medium) and Lock Screen widgets (circular and rectangular) — visible without opening the app. ■ CSV export Export all your entries as a CSV file (date, weight_kg). Your data is always yours to take. ■ Your weight stays on your device All entries are stored on your device. No account is required, and your weight data is never uploaded. There is no HealthKit or iCloud sync. ■ Honest about its limits - Units: kilograms (kg) only. Pounds are not supported. - The daily boundary is based on Japan Standard Time (JST). - This app is not a medical device. BMI and other figures are reference information, not medical advice. It does not promise weight loss or health outcomes — it records your weight and shows it clearly, nothing more. [Ads and purchase] Every feature is available to use. A banner ad is shown at the bottom of the screen; a one-time "Remove Ads" purchase hides the banner (no subscription, no auto-renewal). Showing ads requires a network connection, but your weight data is never sent. Privacy policy: https://honki.ai/simple-weight-log/privacy.html
Screenshots
Verdict
The clearest difference is ads: onTrack at none against Simple Weight Log's shown. Simple Weight Log's advantage is update cadence (every 5 days vs every 7 months). On price, in-app purchases, device support and iOS requirement 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
Both are free to download. onTrack sells 1 one-off in-app purchase and Simple Weight Log sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
onTrack ships an update every 7 months, Simple Weight Log every 5 days. The most recent releases landed on October 8, 2026 and October 2, 2026 respectively.
| Parameter | onTrack | Simple Weight Log |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 7 months | Every 5 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 3 MB | 7 MB |
| Age rating | 17+ | 4+ |
| Developer | Anuj Shelat | 丽佳 施 |
In-app purchases
onTrack
- Customization Feature$6.99
Simple Weight Log
- Remove Ads$0.49









