# NinjaButton — A button for smartphone timing

> A button for smartphone timing (iPhone/iPad app by CONCEPT PROTO Inc..)

- Source: https://appshunter.io/ios/app/ninjabutton/id6808265657 (this page in markdown: same URL + `.md`)
- Developer: [CONCEPT PROTO Inc.](https://appshunter.io/developer/1552850971)
- Category: Sports, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 15.5 · 38 MB
- Languages: American English
- Released: 2026-09-11
- Data updated: 2026-10-10

## What is NinjaButton?

NinjaButton is a wireless button for timing sports activities with your smartphone.

Place NinjaButtons at the start, finish, or other points on your course, and simply press a button to control the stopwatch on your smartphone.

You can register up to three NinjaButtons with the app.

■ Registering a NinjaButton

1. Open the app and tap the gear icon in the upper-right corner to open Settings.
2. Tap “QR CODE” and scan the QR code on your NinjaButton.
3. Confirm that the Button ID appears, then tap “APPLY.”
4. When “READY” appears on the main screen, you’re ready to start timing.

You can also register a NinjaButton by entering its Button ID manually.

■ Timing

1. Make sure “READY” is displayed on the main screen.
2. Press a registered NinjaButton to start the timer.
3. Press a NinjaButton again to stop the timer and display the result.
4. Tap “RESET” to clear the result and get ready for the next measurement.

If multiple NinjaButtons are registered, you can control the stopwatch from any of them.

■ Main Features

・Wireless timing with NinjaButton
・Register up to three NinjaButtons
・Easy Button ID registration by QR code
・Manual Button ID entry
・Time display to 1/100 of a second

※A NinjaButton device, sold separately, is required for wireless timing with this app.

## Is NinjaButton safe?

Not enough ratings yet to assess NinjaButton.

## Is NinjaButton legit?

NinjaButton has limited verification signals. The AppsHunter Legitimacy Score for NinjaButton is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0.1 — 2026-09-11

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-10.*