Core check-in

Stand the phone up and jump

Place the iPhone 1.5–2.5m away. Step into the frame and start jumping. The AI counts. Works in regular indoor light, with everyday clothes — counts stay steady.

• Each jump counted as it happens — no need to hold a counter
• 30 / 60 / 90 / 120-second timed runs, or free-form
• Jump as long as you like with adjustable durations
• Camera frames are wiped right after counting — never archived, never uploaded

Friend challenge

Drop a code in any chat — they'll come jump too

After your run you get a 6-character invite code, a QR, and a nice composite image. Send it. They scan or type the code, jump too, and both scores land on a single VS card. Five ways to play:

• Timed jumps: 15 / 30 / 60 seconds — most jumps wins (free to create)
• Cadence PK: compare jumps per minute — rhythm over brute force
• Training PK: both run the same training mode, highest total wins
• Endurance: a multi-day check-in duel — who shows up every day?
• Custom challenge: you set the jump time, rest time and rounds; they jump the exact same plan

Creating a challenge: timed jumps are free, the other types are Pro. Joining a challenge is always free — anyone with a code can compete. Also:

• No friends yet? AI Sparring will warm you up — sometimes it lets you win
• Codes expire after 48 hours so old codes don't get re-used by mistake
• No global leaderboard — only invite holders see the result; no videos or photos uploaded, just the score numbers