WHAT IS A CHALLENGE APP? HOW DOIN' WORKS.

Existing tools — group chats, hashtags, habit trackers — let people announce a challenge. Doin' lets them run one.

Doin' is a social challenge platform where anyone can launch a structured group challenge, invite people with a single link, and get real daily participation with server-timestamped photo proof and a permanent leaderboard.

HOW THE CHALLENGE APP WORKS

Create a challenge — working out, no sugar, cold showers, reading, anything. Share one link. Everyone who joins starts simultaneously.

One photo per day as proof, timestamped server-side. A live feed shows every participant's daily progress in real time. Miss a day and your streak breaks — visible to everyone. “3 out of 4 already checked in. You're the only one left.”

When the challenge ends, the leaderboard locks. Results are permanent on every participant's profile. One tap to share your scorecard to Instagram, TikTok, WhatsApp, or LinkedIn.

WHO THE CHALLENGE PLATFORM IS FOR

Individuals, friend groups, creators, brands, companies, and events. A daily challenge app for anyone who wants to commit to something with real people watching. A group challenge app for teams and communities who want to activate their audience — not just entertain it.

Challenges run 1, 7, 14, or 30 days. No download required — everything works fully in the browser.

Start Doin'

Also read: Accountability app: why social proof works better than willpower.