Bounce back, day by day.
A private, local-first companion for living with an injury — track how your recovery feels, in body and mind, and watch the line climb.
Recovering from an injury is as much a head game as a body one. A bad day isn't just pain — it's the frustration, the fear of re-injury, the dip in mood when progress stalls. Most trackers only count reps or log pain on a 1–10 scale. Rebound tracks the whole picture — physical and emotional — and frames every bad day as data, not failure.
It started as a way to track a stubborn knee, but nothing about it is knee-specific: use it for a back, a shoulder, a post-surgery recovery, or any nagging injury you want to understand over time.
A sub-minute daily check-in across six evidence-informed dimensions rolls up into a single 0–100 Body & Spirit Score, then becomes a warm calendar heatmap and a trend line so your recovery becomes visible — and, on the good days, worth celebrating.
- 🎚️ Daily check-in — six 0–10 sliders with haptic detents, plus a free-text note
- 🌡️ Body & Spirit Score — one friendly 0–100 number across five supportive bands
- 🗓️ Weather calendar — a month heatmap where each day is tinted by its score, with a dual-tone footer hinting body vs. mood at a glance
- 📈 Trends — a smooth 7 / 30 / 90-day line, with average, streak, and current band
- 🔔 Daily reminder — a gentle local notification at a time you choose
- 🔒 Private by design — everything stays on your device. No account, no cloud, no tracking
| Today | Calendar | Trends | Settings |
|---|---|---|---|
 |
 |
 |
 |
The six dimensions are drawn from injury & rehabilitation psychology — recovery depends on far more than pain level. Negative items (pain, fear) are inverted so that higher always means better, then each is weighted and summed into a 0–100 composite.
| Dimension | What it captures | Weight |
|---|---|---|
| Pain | Pain intensity (inverted) | 0.20 |
| Mobility | Functional movement — walking, stairs, bending | 0.20 |
| Mood | Affect & morale | 0.20 |
| Confidence | Self-efficacy — trust in the injured area | 0.15 |
| Fear of movement | Kinesiophobia — avoidance / fear of re-injury (inverted) | 0.15 |
| Sleep | Sleep quality | 0.10 |
Scores fall into five non-judgemental bands — Tough day → Struggling → Holding steady → Good day → Thriving — each with a short, supportive companion message that nudges toward steady, anti–boom-bust pacing.
Local-first and dependency-light by design.
- Expo SDK 56 · React Native 0.85 · expo-router (file-based navigation)
- expo-sqlite behind a single repository seam (
src/data/entriesRepository.ts) — ready for an optional backend sync later - expo-notifications for the daily local reminder
- react-native-reanimated + gesture-handler for the springy interactions; react-native-svg for the score dial, heatmap, trend chart, and the hand-rolled icon set (no icon font, no chart library)
- Fraunces + Inter via
@expo-google-fonts - Forced light theme — warm Paper Dawn canvas with Dawn Coral and Spring Mint accents
src/
├── app/ # expo-router screens (Today, Calendar, Trends, Settings, day detail)
├── components/ # ScoreDial, ScoreSlider, MonthHeatmap, TrendChart, Confetti, Icon, …
├── scoring/ # the six dimensions + the 0–100 composite and bands
├── data/ # SQLite schema + entriesRepository (the persistence seam)
├── notifications/ # daily reminder scheduling
└── theme/ # palette, tokens, brand
Prerequisites: Node 20+, a JDK (17 recommended), the Android SDK + platform-tools, and an Android device or emulator.
git clone https://github.com/Piryus/rebound.git
cd rebound
npm install
# generate the native Android project from app config
npx expo prebuild --platform android
# build, install on a connected device, and start Metro
npx expo run:androidDay to day after the first build, just start the bundler and press a:
npx expo start --dev-client📦 Building a standalone APK for yourself, or publishing to the Play Store later? See docs/RELEASE.md.
- Personalize what you're tracking (e.g. label it "left knee" / "lower back")
- Per-dimension trend overlays & correlations (sleep vs. pain, mood vs. mobility)
- Full-year contribution-style heatmap
- Optional encrypted backend sync / multi-device (the repository seam is ready)
- iOS build & App Store packaging
- Accessibility pass (dynamic type, screen-reader labels)
Issues and PRs are welcome. See CONTRIBUTING.md.
MIT © Emile Legendre
Rebound is a personal-wellbeing tool, not a medical device. It does not diagnose, treat, or give medical advice — talk to a qualified clinician about your injury.