Track the challenge. Prove the work. Stay accountable. Proving anchors every 40, 75 or 90-day challenge to a number you're chasing, then verifies progress through Apple Health on iPhone, native camera proof and your people.
Free to join · iPhone first · no spam, one launch email
Most challenge apps are honour-system checklists. Proving keeps you honest by connecting to the places the truth already lives — Apple Health on your iPhone, the in-app camera and the person you've asked to hold the line.
Every challenge is anchored to a measurable outcome — a 10k time, a weight, a distance. Two scoreboards: don't break the chain, and watch the number move.
Workouts verify first through Apple Health on iPhone. Photos come from the native in-app camera only — timestamped, no gallery uploads. Strava follows after the Apple Health proof path is stable.
Your partner sees your board, confirms what sensors can't, and gets the nudge when you're slipping. They see badges — never your health data.
Native iOS proof from Apple Health for workout and step checks. Strava is planned next; Health Connect is not part of the iPhone-first launch.
In-app camera, timestamped. Progress shots, tonight's page, today's meal.
Your accountability partner confirms within 24 hours. Accountability runs both ways.
Still allowed — but labelled. Honesty about the honour system is the point.
The share of your challenge that was proven rather than promised. It's the number on your finisher card — and the reason a Proving finish carries weight that a checklist never will.
Join a challenge people recognise, then shape it to your life — duration, diet, indoor workouts for brutal climates, and how hard the consequences bite: Iron, Standard or Flex.
The starter. One workout, water, ten pages, a daily photo — and one goal with a number on it.
The full-spirit hard challenge. Two workouts, clean diet, water, reading, photo. No shortcuts — unless you chose them.
Goal-heavy, block-structured, for the big swing. The one you graduate to.
October to New Year, everyone together. Enrolment opens in September.
Waitlist members get founding-member pricing, first access to The Arc, and a say in what we build next.
One email at launch. That's it.