# Stroboscope: 300Hz + Presets — Match motor RPM · Fan · Drone

> Match motor RPM · Fan · Drone (iPhone/iPad app by Kyu-Hee Jang.)

- Source: https://appshunter.io/ios/app/stroboscope-300hz-plus-presets/id6760181575 (this page in markdown: same URL + `.md`)
- Developer: [Kyu-Hee Jang](https://appshunter.io/developer/1587578867)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 17+
- Requires: iOS 16.4 · 57 MB
- Languages: American English
- Released: 2026-03-10
- Data updated: 2026-08-20
- User reviews in markdown: https://appshunter.io/ios/app/stroboscope-300hz-plus-presets/id6760181575/reviews.md

## What is Stroboscope?

Professional strobe light for inspecting rotating machinery, measuring RPM, and freezing motion. Adjust frequency from 0.5–100 Hz with precision control — perfect for mechanics, engineers, and creators.

FEATURES:
• Adjustable frequency range from 0.5 Hz to 100 Hz
• Three duty cycle modes: 10%, 25%, and 50%
• ×2 and ÷2 buttons for quick harmonic frequency finding
• RPM presets for common motor and fan speeds
• Real-time display of period, timing, and flashes per minute
• Clean, intuitive interface designed for fieldwork

APPLICATIONS:
• Inspect rotating machinery and motors
• Measure fan blade and propeller RPM
• Freeze apparent motion for visual inspection
• Verify belt and gear synchronization
• Educational physics demonstrations

Whether you are a maintenance technician, engineer, or hobbyist, this stroboscope app gives you the precision tools you need for motion analysis and rotational speed measurement right in your pocket.


## Version history (last 5 releases)

### 1.1.18 — 2026-08-15

Fixed the app closing the moment it opened on some devices, instead of bringing up the strobe controls.
Added a safeguard so a full-screen ad can never appear on top of a strobe that is already running.

### 1.1.17 — 2026-08-06

Ads no longer interrupt you mid-task. Anything full-screen now waits until you have finished what you were doing, and the app stops showing a blank pause where an ad failed to load.

### 1.1.16 — 2026-08-04

Thanks for using our app! This update brings behind-the-scenes performance and stability improvements for a smoother, more reliable experience. Your support means the world to us.

### 1.1.15 — 2026-07-30

Thanks for using our app! This update brings behind-the-scenes performance and stability improvements for a smoother, more reliable experience. Your support means the world to us.

### 1.1.14 — 2026-07-28

Thanks for using our app! This update brings behind-the-scenes performance and stability improvements for a smoother, more reliable experience. Your support means the world to us.

## More apps by Kyu-Hee Jang

- [Calculator+ Tip Tax BMI Unit](https://appshunter.io/ios/app/calculator-plus-tip-tax-bmi-unit/id1587591476)
- [QR Lens+ Barcode Scanner Pro](https://appshunter.io/ios/app/qr-lens-plus-barcode-scanner-pro/id1590631012)
- [Sound Noise Meter+ dB SPL](https://appshunter.io/ios/app/sound-noise-meter-plus-db-spl/id1593197145)
- [Tremor Vibration Meter](https://appshunter.io/ios/app/tremor-vibration-meter/id6759666731)
- [Lux Light Meter - Luminance](https://appshunter.io/ios/app/lux-light-meter-luminance/id6759858193)
- [Barometer: Air Pressure](https://appshunter.io/ios/app/barometer-air-pressure/id6759883097)

All apps by Kyu-Hee Jang: https://appshunter.io/developer/1587578867

## Related topics

[flicker meter](https://appshunter.io/ios/topics/flicker-meter) · [strobe tachometer](https://appshunter.io/ios/topics/strobe-tachometer)

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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 2026-08-20.*