8playJackFit
JackFit
Hold your phone in one hand, do your jumping jacks, and JackFit counts every one. No camera, no wearable, no account.
In development. Not on an app store yet.
What it does
- Sets of 50 or 100 jacks, or 1 or 3 minutes.
- Two counting modes: Jumping, and a low-impact Step mode for apartments and sore knees.
- Haptics, sound ticks and a spoken count, plus an optional pace beat.
- A summary for every set: jacks, time, jacks per minute, best 10 seconds and a pace chart.
- An optional weekly leaderboard with a display name only.
How it works
- Hold the phone in one hand, screen toward your palm.
- Stand still for a moment while it calibrates.
- Start. A jack counts each time your arms sweep overhead and back down.
Details
- Platforms
- iPhone and Android
- Requires
- iOS 18 or later, or Android 10 or later.
- Languages
- English, Vietnamese, Japanese, Korean, French, German, Spanish, Brazilian Portuguese
- Price
- Free to start. Plus is an optional subscription with a 7-day free trial.
- Help
- hello@8play.dev