RPM Meter: Stroboscope
Tachometer & Strobe Light
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Turn your phone into a stroboscope to measure any machine's RPM. Camera & torch strobe modes, harmonic helper and built-in tools. Works fully offline.
RPM Meter turns your phone into a stroboscope (strobe tachometer) for measuring the rotational speed of any spinning machine — motors, fans, pulleys, drills, propellers, turntables — without ever touching it. Fully offline, no internet required.
How It Works
Put a single mark on the spinning part, then dial in an RPM until the mark appears frozen. The value on screen is the machine's true RPM. It's the classic stroboscope principle, right in your pocket.
Camera Mode
A live camera preview is frame-sampled at your chosen frequency so the rotating part visibly freezes on screen — works in normal light. Tune the RPM with a precise keypad, ×2/÷2 harmonic buttons, or the seek bar. Manual exposure, ISO, focus, zoom, and lens selection help you lock in a crisp, sharp freeze.
Strobe Light Mode
Pulses your phone's torch (LED flash) at the chosen frequency to freeze motion in the dark — a real strobe light. The same screen doubles as a plain flashlight with a steady-torch button.
Find the True RPM with Confidence
A mark also freezes at multiples of the real speed (harmonics), so the same machine can read differently between modes. The built-in harmonic helper shows you the candidate speeds — just count the frozen marks you see and tap to set the true RPM. Start high and reduce for an accurate reading.
Built-in Tools
• RPM ↔ Hz, rad/s, and °/s conversions
• Surface speed from diameter (m/s, m/min, ft/min)
• Pulley / gear ratio calculator (driven RPM)
• Save and label readings for later
Why RPM Meter?
• Fully offline — no account, no internet, complete privacy
• Two modes: camera (bright light) and torch strobe (darkness)
• Precise control up to 6000 RPM with a harmonic helper
• Keeps the screen awake during measurement
• Clean, dark, industrial design built for the workshop
Note: phone hardware limits the maximum flash rate. The camera freeze is bounded by the screen/camera frame rate, and the torch realistically tops out near ~1500 RPM — use harmonics and the in-app tips for higher speeds.
Download RPM Meter — Stroboscope and measure rotational speed anywhere, anytime, completely offline.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://hivesoftsol.github.io/hivesoftsol/privacy-policy.html
Customer Support:
Have questions or feedback? Contact us at babaralleshah25@gmail.com
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Babar Ali Shah, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Babar Ali Shah
- Size
- 28.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.6 or later.
- iPhone
Requires iOS 15.6 or later. - iPad
Requires iPadOS 15.6 or later. - iPod touch
Requires iOS 15.6 or later. - Mac
Requires macOS 12.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Yearly Subscriptions $39.99
- Monthly Subscriptions $6.99
- Weekly Subscriptions $1.99
- Copyright
- © 2026 HiveSoft