Strobe Light Tachometer vs STL Simple Viewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Strobe Light Tachometer
Transform your iPhone into a powerful strobe light and tachometer. Precisely control flashing speeds from 1Hz to 130Hz to measure the RPM of rotating objects by making them appear stationary. Ideal for precise speed measurements in dark environments.
- Adjustable strobe speed (1-130Hz / 60-7800RPM)
- Quick adjustment buttons (x2, ÷2)
- Fine-tuning buttons for precise speed
- Manual RPM input
- Display speed in Hz and RPM
- Light/dark background option
Read full descriptionHide full description
NOTE: The App is just for iPhone with flashlight. It doe NOT work on iPad, iPod touch or any iOS device without flashlight. Description: Using this App, you can control the flashing on/off speed of your phone flashlight between 1Hz to 130Hz. In another word, this App makes your iPhone into a strobe light. What's the Application then?! You can use this App to use your iPhone as a tachometer that measures the speed of any rotating object. How to use it? Suppose you have a fan and need to measure its speed (RPM). Turn on the fan in a DARK environment, launch the App on your iPhone (that has flashlight). Manually tune the speed using the main slider of the App to see the rotating object looks almost not moving. Then, start fine tuning using the three buttons in the App to get the exact speed. At this point the rotating object looks like stationary! But, it is moving! So, never touch the moving/rotating object during your test! Features: - Slider to adjust strobe light speed between 1-130Hz (60-7800RPM) - x2 and ÷2 buttons for quick adjustment of flashing speed - 3 Buttons for fine tuning of the speed up to 2 decimal: 0X.00, 00.X0, 00.0X - Textfield to manually enter the speed in RPM (tap on the speed label) - Button for light and dark background option - showing the speed in both Hz and RPM - simple and easy to use!!
STL Simple Viewer
Easily view and interact with 3D STL CAD models. Supports various file types and offers advanced rendering options for detailed analysis. Get model information and explore interiors with clipping planes.
- View ASCII and Binary STL files
- Load STL from ZIP
- Rotate, pan, and zoom
- Orthogonal and Perspective modes
- Model info (triangle count, bounding box)
- Rendering options (faces, edges, transparency)
- Clipping plane for interiors
Read full descriptionHide full description
STL Simple Viewer is a great app to quickly view 3D STL & 3MF files and export them to the most commonly used CAD formats. Features: - Supports STL files both ASCII and Binary formats. - Supports 3MF files. - Load STL and 3MF files directly from ZIP archives. - Export to DXF, OBJ, DAE, PLY and USD. - Rotate, pan, and zoom models with intuitive touch controls. - Measure distances between points within your model. - Configure rendering options: faces, edges, points, background and transparency. - Render using a clipping plane (useful for viewing model interiors). - View models in Orthographic or Perspective mode. - Obtain model information including triangle count, bounding box, surface area, and volume. Privacy Policy: https://www.boviosoft.com/apps/privacy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ For support or questions: support@boviosoft.com
Screenshots
Verdict
Strobe Light Tachometer and STL Simple Viewer both sit at 4.2 stars, but that hides the real split: 63% of Strobe Light Tachometer's written reviews are positive against 17% of STL Simple Viewer's. Strobe Light Tachometer also leads on in-app purchases (none vs 4) and ads (none vs shown). STL Simple Viewer's advantage is ratings volume (866 vs 277). On price, rating 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
Both are free to download. STL Simple Viewer sells 4 in-app purchases, starting at $0.99 per 7 days. Strobe Light Tachometer asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.2 for Strobe Light Tachometer against 4.3 for STL Simple Viewer. Both are backed by a comparable volume of ratings — 277 and 866 respectively. Written reviews are what separate them: 63% of Strobe Light Tachometer's written reviews are positive against 17% of STL Simple Viewer's.
Strobe Light Tachometer ships an update every 7 months, STL Simple Viewer every 20 months. The most recent releases landed on September 22, 2026 and September 23, 2026 respectively.
| Parameter | Strobe Light Tachometer | STL Simple Viewer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (277 ratings) | 4.3 (866 ratings) — better |
| Positive reviews | 63.2% of reviews — better | 17.2% of reviews |
| Number of ratings | 277 | 866 — better |
| Update frequency | Every 7 months — better | Every 20 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 7.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 4 MB | 19 MB |
| Age rating | 4+ | +4 |
| Developer | Motionics LLC | Victor Bovio |
Customer experience
Strobe Light Tachometer
STL Simple Viewer
User reviews
Strobe Light Tachometer
From 277 App Store ratingsWhat we love
- ✅ Accurate frequency and RPM measurements
- 👍 Simple and user-friendly interface
- 🎓 Excellent educational tool for teaching frequency concepts
- 💰 Free application
- ⚡ Quick and easy to use, even one-handed
Room to improve
- 💡 LED flash brightness is too dim
- 🐛 Strobe light cuts out or blacks out intermittently
- 🐛 Inconsistent and erratic flashing patterns
- ⚠️ Hardware compatibility issues with older iPhone models
- 🐛 Strobe stops working after extended use
STL Simple Viewer
From 866 App Store ratingsWhat we love
- 🚀 Simple and intuitive viewer
- 👍 Useful viewing options
- 💡 Supports multiple file formats
Room to improve
- 🐛 Frequent crashes
- 🔋 High battery consumption
- 🚨 Excessive and intrusive ads
- 🔍 Limited functionality for larger files
Bugs and requests
Strobe Light Tachometer
Reported bugs
9 issues- Strobe light cuts out every 2-3 seconds then resumes
- LED flashes erratically on certain iPhone models (iPhone 14, iPhone XS, iPhone SE)
- Strobe pulse is inconsistent and misses beats
- App crashes or stops working after 20-30 minutes
- Requires manual LED activation before starting strobe
Show 4 moreShow fewer
- Incompatibility error message on iPhone devices
- Strobe accuracy degrades at higher frequencies (above 45 Hz)
- Flash pulses vary in length and brightness at high frequencies
- App shows "only compatible with iPhone" error on iPhone devices
Requested features
7 requests- Ability to adjust brightness while strobe is running
- Display accuracy specifications and hardware limitations
- Option to set frequency by Hz in addition to RPM
- Ability to specify number of fan blades for accurate RPM calculation
- 2x and 1/2x multiplier options
Show 2 moreShow fewer
- Reduced or removed advertisements
- Display maximum blink rate for device hardware
STL Simple Viewer
Reported bugs
3 issues- App crashes when opening larger STL files
- Inability to open some file formats
- Ads continue to appear even after paying for ad removal
Requested features
3 requests- Add ability to save color/lighting settings
- Improve stability and reduce crashes
- Provide an ad-free paid version
In-app purchases
Strobe Light Tachometer
No in-app purchases
STL Simple Viewer
- Pro version (1 week plan)$0.997 Days
- Pro version (1 month plan)3 Days trial$1.991 Month
- Remove Ads$2.99
- Export to OBJ, DAE, DXF, PLY$3.99
Questions
Is Strobe Light Tachometer free?
Is STL Simple Viewer free?
Which has better reviews, Strobe Light Tachometer or STL Simple Viewer?
Do Strobe Light Tachometer or STL Simple Viewer have ads?
Which is updated more often, Strobe Light Tachometer or STL Simple Viewer?
Other comparisons
