iOS beta · free while it's open
One app for training, food, and the habits between them.
Compound writes your training week, tracks every set against your last one, and logs meals from a photo, a barcode, or a sentence. Two short daily checklists cover the sleep, food, and screen habits that usually break first.
Free while in beta · iPhone, iOS 18+ · App Store coming later
What's in it
Four things, tracked properly
Train
Answer a few questions about your goal, days a week, and equipment, and Compound builds your first week. Log a set and rate it — next week adjusts from that, not a fixed formula.
Eat
Photograph the plate, scan a barcode, or describe it in a sentence. Calories, protein, carbs, and fat come back in seconds — and every number can be corrected before you save it.
Habits
Four things in the morning — wake time, protein, morning light, screens off. Six at night, including a consistent bedtime and a walk after eating. Rename or turn off anything that doesn't apply.
Rest
Rest days are part of the plan, not a gap in it. A fasting timer runs to whatever target you set, and your training streak already knows how many days a week you train.
Mid-workout
One screen for the set you're on.
Reps and weight come prefilled from the plan. Tick a set off as you finish it and the rest timer starts on its own — skip it if you're ready sooner.
Change either number if the day goes differently, add a set, or swap the movement for one your gym actually has. Rate how it felt and leave a note; next week's targets come from that.
Training streak
A streak that allows for rest days.
Compound already knows your training schedule, so a normal rest day doesn't break your streak. Go past that, and it resets — but the app doesn't dwell on it.
The first thing you see when you come back is one small thing to do today, not a red screen.
How it works
Three steps to your first week
Set your goal
Goal, days per week, experience, equipment, and anything you're working around.
Get your first week
Compound writes it from your answers — every movement, set, and rep target.
Log, and let it adjust
Sets, meals, and habit checks feed the next week. It's never the same plan twice.
From the founder
I kept quitting the same few fitness apps for the same reason: they only watched the hour I was in the gym. The other twenty-three hours — sleep, food, the walk I used to take — were never tracked, and that's where things actually came apart.
Compound writes my training week, I log meals from a photo, and two short checklists keep the rest of the day honest. It's the first one I've stuck with past week three.
— Stewart