ContourArc

Weight · Measurements · Progress photos

See the change you can't see day to day.

Progress is slow up close. ContourArc lines up your weigh-ins, measurements and photos over time so the change becomes obvious — whether you're losing, building or maintaining.

Coming soon to the App Store No account. Your data never leaves your iPhone.
A woman stretching in warm morning light
The ContourArc Today screen: current weight, a weight trend chart and the next check-in

A minute a week. That's the whole habit.

Check in on the rhythm that suits you — daily, every few days or weekly. ContourArc does the lining-up, so you can see what's actually changing.

1

Check in

Log your weight, a few measurements and front, side and back photos in one quick entry. A faint guide from last time helps you line up each photo.

2

Compare

Drag a slider between any two dates, or view them side by side, with the difference in weight and measurements right underneath.

3

See the arc

Charts show the trend behind the day-to-day noise, with your goal line and a rough read on where your recent pace is heading.

A woman checking her phone between sets at the gym A man in a cap looking at his phone at the gym

Charts that show the arc, not the noise.

Weight moves around from one day to the next. The trend is what matters — so that's what ContourArc puts front and centre.

  • Weight and measurementsWaist, chest, arms, body fat and more, each with its own trend.
  • Goals, framed kindlySet a target if you want one. Projections are a rough read, never a schedule.
  • Apple Health, if you likeOptional two-way weight sync, so you never enter it twice.
The ContourArc Charts screen showing a weight trend and measurement cards
A woman sitting on a yoga mat at home

Private by design

Your body, your data, your iPhone.

  • No account, no cloudYour photos, weight and measurements are stored only on your iPhone.
  • Out of your camera rollProgress photos stay inside ContourArc — never mixed in with your other pictures.
  • Face ID lockOptionally require Face ID every time the app opens.
  • Yours to take with youExport every photo and a spreadsheet of your entries at any time.

One simple subscription.

ContourArc is a subscription app, billed weekly or yearly through your Apple Account. Cancel any time in your Apple Account settings.

Coming soon to the App Store

Prices are shown in the app in your local currency before you subscribe.