Rebound GitHub
a recovery you can actually see

Is it getting better — or does it just feel that way?

Rebound is a small, private app for tracking how an injury really feels — body and mind — so your recovery stops being a guess.

60 seconds a day 0–100 Body & Spirit Score 100% on your phone
The Rebound daily check-in: a Body & Spirit Score of 68, a Good day, with sliders for pain and mobility
Why I built this

A few years ago, I wrecked my knee.

Not dramatically — no surgery, no crutches, no good story to tell at dinner. Just a low, stubborn ache that came and went for reasons I could never quite pin down.

The pain wasn't the hard part. Not knowing was. Some weeks felt like progress, some felt like backsliding, and most felt like noise. I genuinely couldn't tell whether I was healing or just having a good Tuesday.

So I built Rebound: a sixty-second daily check-in that turns all that vague feeling into something I can actually look at. It turns out "how's the knee?" has a real answer — you just have to write it down for a month.

— Emile

Six tinted sliders — pain, mobility, confidence, fear of movement, mood, sleep

A check-in, not a chore.

Six quick sliders and a note. Recovery is physical and emotional, so Rebound tracks both — the ache and the mood, the mobility and the fear of pushing too hard.

PainMobility ConfidenceFear of movement MoodSleep
A month calendar where each day is tinted by its score, warm reds easing into greens

Your weather, day by day.

Every day gets a color — warm on the tough ones, fresh green on the good ones. A tiny two-tone mark hints at body versus mood, so a glance tells you more than a number ever could.

A trend line climbing from the mid-40s into the 80s over a month, with a small flare dip

Watch the line climb.

Over weeks, the noise becomes a shape. The slow climb of getting better, the honest dip of a flare, the streaks worth being proud of — finally visible, and quietly motivating.

One number, grounded in how recovery actually works.

The Body & Spirit Score blends all six dimensions — including the ones most trackers ignore, like fear of re-injury and morale — into a single 0–100. Five gentle bands, because a bad day is data, not failure.

0–24
Tough day
25–44
Struggling
45–64
Holding steady
65–84
Good day
85–100
Thriving
● Private by design

It never leaves your phone.

No account, no cloud, no analytics, nothing to sign up for. Your check-ins live on your device and only your device — Rebound is a journal, not a data business.