Weight Tracker:
Scale Friend
A calm, private weight tracker that smooths out the daily noise to show the trend that actually matters. You get clear progress charts, goal estimates and gentle reminders, with everything stored on your own device.
Overview
See your real progress, not the daily noise.
Weight Tracker: Scale Friend turns a few seconds of logging into a clear answer to the question most people actually have: am I making progress? Instead of reacting to every daily up and down, the app calculates a smoothed trend line from your weigh-ins. It shows your real rate of change, how far you are towards your goal, and an estimated date for reaching it if you keep your current pace.
Built as part of the Apposite Labs mobile portfolio, Weight Tracker: Scale Friend shows how a focused, well-designed tool can beat a bloated one. It has no calorie counting, no account and no subscription: just honest progress tracking that stays on your phone.
The problem
Daily weigh-ins make progress hard to see.
Body weight naturally moves up and down from day to day, so a single number on the scale rarely tells the real story. Existing options fall short in different ways:
The need was clear: a way to log in seconds, see the underlying trend, and keep it private. Weight Tracker: Scale Friend was built to do all three.
Key features
Everything the app does.
Smoothed Trend Weight
Every weigh-in feeds a smoothed trend line that filters out daily swings, so you can see your true direction and rate of change, for example "↓ 0.47 kg per week".
Goals & Estimated Finish Date
Set a goal weight with an optional target date or weekly pace. A progress ring shows how far you've come, a target line on the chart shows where you planned to be, and the app estimates when you'll arrive at your current rate.
Quick-Entry Logging
A large calculator-style keypad logs a weigh-in in seconds, in kilograms, pounds, or stones and pounds. Notes, multiple weigh-ins a day and editing past entries are all supported.
Insights & Milestones
Weekly and monthly changes, averages, your best week and day-of-week patterns are explained in plain language, alongside understated milestone badges for progress and consistency.
Body Measurements
Track waist, hips, chest, arm, thigh and neck on a simple tappable body map, with a chart for each, because inches can drop even when the scale doesn't.
Reminders & Routines
Optional weigh-in reminders, plus personal repeating reminders for anything else on a schedule (daily, weekly or every few days), all controlled from Settings.
Design philosophy
Encouraging, not clinical.
Weight Tracker: Scale Friend is designed to feel like a calm, supportive companion, not a medical tool. Every screen is built around clarity, warmth and reassurance. The interface prioritises:
- — A soft, minimal visual language over a clinical or "gym" aesthetic
- — Trends over individual numbers, so one heavy day never feels like failure
- — Plain-language explanations when the scale jumps
- — Gentle, judgement-free framing, with no streak pressure
The app never claims to give medical advice. It gives a private, honest view of your own data so you can make your own decisions, and points you towards a GP where that's the right next step.
The core flow is four steps:
- 01 Open the app
- 02 Tap Log weight
- 03 Enter today's weight on the keypad
- 04 See your trend, goal progress and estimated finish date update instantly
Technology
Built using a modern mobile-first architecture.
Weight Tracker: Scale Friend does all of its tracking and analysis on the device, with a lightweight React Native front end built for quick, one-handed use.
- React Native (Expo) — a single codebase ready for Android and iOS
- On-device trend analysis — smoothing, rate of change and goal estimates are calculated locally, with no server involved
- Local-first storage — weigh-ins, measurements and goals stay on the device, with no account and no cloud backup
- Custom vector charts — hand-built, animated SVG charts, progress rings and milestone badges
- Local notifications for weigh-in and routine reminders
- Ad-supported monetisation with consent management (Google UMP)
- Anonymous crash reporting that never includes health data
- Google Play distribution