Comparison

Strobr Scope vs Strobe Light

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Strobr Scope

This utility app uses your device's camera to measure the frequencies of various cycles, including rotational speeds and electrical light frequencies. It offers a more convenient and less distracting alternative to traditional stroboscopes, capable of measuring even very slow rotations.

Highlights
  • Camera-based stroboscope
  • Measures rotational frequencies
  • Measures electrical light frequencies
  • Measures slow rotations
  • Continuously variable frame rates
  • Convenient and less distracting
Features
Read full description

Strobr Scope is a camera-based stroboscope app that relies on continuously variable frame rates to measure the frequencies of cycles. A traditional stroboscope flashes bright lights at a specific frequency that can be easily matched to the rotational frequency of i.e. a car wheel using persistence of vision (POV), allowing the rotational speed to be measured. Strobr Scope works similarly, but can also measure many things like electrical light frequencies and very low slow rotations that a traditional stroboscope cannot. It’s also more convenient and much less distracting to others! This app was built at PennApps 2017 and won top 30 there.

About

Strobe Light

This application transforms your smartphone into a digital tachometer using its flashlight. It measures the rotational speed (RPM) of objects by flashing light at them, making them appear stationary when the flash rate matches their speed. Save readings and use it for mechanics, education, or industrial checks.

Highlights
  • Measures RPM of rotating objects
  • Adjustable strobe speed (1-10,000 RPM)
  • Quick adjustment buttons (+/- increments)
  • Flash sync for accuracy
  • Save and review RPM data
  • Works in low light conditions
Features
Read full description

Strobe Light - RPM turns your phone into a powerful tool for measuring the speed of rotating objects. The app works like a digital tachometer and offers two measurement modes: Strobe Light and Camera. You can measure the RPM of fans, motors, wheels, and other rotating devices without touching them. In both modes, the same stroboscopic principle is used. When the flash rate or camera frame rate matches the speed of the object, it creates the illusion that the object is standing still. This helps you visually determine the exact rotational speed of the object with high accuracy. Strobe Light Mode Using your phone's flashlight, this mode flashes light at the object in a specific pattern. It works best in a dark or low-light environment and is ideal when you want a quick RPM reading with the built-in flashlight. How to Use (Strobe Light): Mark the rotating object with something visible (a sticker or tape works well). Point your phone's flashlight toward the object. Turn on the strobe using the power button. Adjust the strobe speed using the + and - buttons until the object looks still. The RPM shown on the screen is the object's rotation speed. You can save the reading for later reference. Camera Mode Camera mode uses your phone's camera to show a live preview at a set frame rate (FPM — Frames Per Minute). When the frame rate matches the object's RPM, the rotating object appears frozen on screen. This mode is useful in well-lit conditions when you want to see the object clearly while tuning the speed. How to Use (Camera): Open Camera mode from the home screen and allow camera permission. Point the camera at the rotating object. Adjust the frame rate using the + and - buttons until the object looks still. The value shown on the screen is the object's RPM. Use the flash button if you need extra light in darker areas. Save or reset your reading anytime from the bottom buttons. Where It's Useful: Mechanics: Test fans, engines, or motors by measuring RPM. Education: Ideal for physics experiments that require RPM measurements. Industrial Use: Check the condition of rotating machinery. Calibration: Ensure rotating devices are running at the correct speed. Maintenance: Compare readings over time using saved history. Key Features: Two Measurement Modes: Choose Strobe Light or Camera from the home screen based on your environment and preference. Adjustable Strobe Speed: Set the strobe from 1 to 10,000 RPM for accurate measurements. Camera Frame Rate Control: Set camera preview from 30 to 14,400 FPM for precise visual tuning. Quick Adjustment Buttons: Easily change the speed with buttons for +1, +10, +50, or +100 RPM increments in both modes. Flash Sync (Strobe Light): Ensures the light flashes at the correct frequency for accurate RPM readings. Built-in Camera Flash (Camera Mode): Toggle the flash on or off for better visibility in low light. Save and Reset: Save current RPM readings with a custom title or reset to default anytime. History Tracking: Save and review your RPM data anytime for easy access from the menu. Works in Different Lighting: Strobe Light works best in the dark; Camera mode works well in normal and low-light conditions. Simple and Energy-Efficient: The app's interface is easy to use and designed to be practical for everyday measurements. Visual Tachometer: Acts just like a real tachometer using visual strobe techniques with your phone's flashlight or camera. Strobe Light - RPM makes it simple to measure RPM without any special tools or equipment. Whether you prefer the classic flashlight strobe method or the new live camera preview, this app gives you flexible and accurate RPM measurement in one place. Perfect for mechanics, hobbyists, students, and professionals alike. Contact us at: zsmapps2024@gmail.com Terms of use: Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Strobr Scope2 screens
Strobe Light3 screens

Verdict

The call

The clearest difference is rating: Strobr Scope at 3.7 against Strobe Light's 2.0. Strobr Scope also leads on ads (none vs shown) and monetization model (free vs ad-supported). On price, update cadence, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Strobr Scope holds the better App Store score, 3.7 against 2.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

UpkeepUpdate frequency

Strobr Scope ships an update every 12 months, Strobe Light every 7 months. The most recent releases landed on September 28, 2026 and October 9, 2026 respectively.

Scorecard5 real differences · 5 level
Strobr Scope versus Strobe Light: the parameters behind the verdict, then further details
ParameterStrobr ScopeStrobe Light
PriceFreeFree
Rating3.7 (3 ratings) — better2.0 (1 ratings)
Positive reviews—0.0% of reviews
Number of ratings3 — better1
Update frequencyEvery 12 monthsEvery 7 months — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better15.0
Further details — not scored
Size14 MB25 MB
Age rating4+4+
DeveloperAlexander ZhangZain Saeed Mughal

Customer experience

Strobr Scope

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%

Strobe Light

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Strobr Scope

No in-app purchases

None

Strobe Light

No in-app purchases

Questions

Is Strobr Scope free?
Strobr Scope is free to download, with no in-app purchases.
Is Strobe Light free?
Strobe Light is free to download, with no in-app purchases.
Which has better reviews, Strobr Scope or Strobe Light?
Strobr Scope is rated higher. Strobr Scope averages 3.7 out of 5 from 3 ratings, while Strobe Light averages 2.0 from 1 ratings.
Do Strobr Scope or Strobe Light have ads?
Strobe Light shows ads; Strobr Scope does not.
Which is updated more often, Strobr Scope or Strobe Light?
Strobr Scope ships an update every 12 months, and Strobe Light every 7 months. Most recently, Strobr Scope was updated on September 28, 2026 and Strobe Light on October 9, 2026.

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