Ruler App vs Physics Labs
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ruler App
Transform your iPhone or Apple Watch into a precise measuring tool. Easily switch between imperial and metric units and adjust the ruler's height for direct comparisons. Customize your experience with different color schemes.
- Imperial and metric scale switching
- Adjustable ruler height
- Color scheme customization
- Apple Watch compatibility
- Switchable ruler scales
Read full descriptionHide full description
Turn your iPhone or Apple Watch into a ruler and measure the scale of any small thing. Features: - switch between imperial and metric scales - adjust the height of the ruler for direct comparison - different color schemes - switchable ruler scales Apple Watch App: - switch between imperial and metric scales - switchable ruler scales
Physics Labs
This app uses your device's sensors to measure various physical quantities like acceleration, magnetic fields, and sound levels. View data in coordinates or scalar magnitude, and export it to Excel for analysis. It's a digital lab for your phone.
- Measure acceleration, magnetic fields, and sound levels
- View data in X, Y, Z coordinates or scalar magnitude
- Export sensor data to Excel for analysis
- Eliminate gravity from acceleration measurements
- Measure atmospheric pressure
Read full descriptionHide full description
Physics Lab is all-in-one Sensor app which let you know physical entities around you like acceleration, magnetic fields, light intensity, sound decibel and much more... Physics Lab measures physical parameters by using your device sensors which typical device contain bunch of those sensors! Application give output in high precision with short intervals based on your sensor's capabilities. In Physics Lab, you can observe physical data in coordinates (X-axis, Y-axis, Z-axis) or in scalar magnitude. If you want, you can export sensor data into Excel by one click! Using export to excel feature you can obtain statistical information about your measurement. Physical quantities that can be measured Physics Lab: * Accelerometer: Measuring acceleration around your device. Output in m/s2 for x, y and z axes. Also, you can eliminate gravity from your measurements by one click and see real acceleration. * Magnetometer: Measuring magnetic field around your device. Output in µT for x, y and z axes. * Gyroscope: Measure angular inclination in x, y and z axes. Output in degree (°) * Luxmeter: COMING SOON * Barometer: Measure atmospheric pressure. Output in bar. * Noisemeter: Measure loudness around you. Output in dB. If you like our application, you can give us 5 stars. You can forward any suggestions, requests or concerns to info@grandmount.org
Screenshots
Verdict
The clearest difference is review sentiment: Physics Labs at 100% against Ruler App's 0%. Physics Labs also leads on price (Free vs $0.99) and update cadence (every 2 weeks vs every 11 months). Ruler App's advantage is ads (none vs shown) and iOS requirement (12.0 vs 15.6). On 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
Physics Labs is free to download; Ruler App costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Ruler App ships an update every 11 months, Physics Labs every 2 weeks. The most recent releases landed on September 28, 2026 and June 9, 2026 respectively.
| Parameter | Ruler App | Physics Labs |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 2.6 (5 ratings) — better | — |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 5 — better | — |
| Update frequency | Every 11 months | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Ad-supported — better |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 2 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Piet Jonas | Huseyin Aykut Uludag |
Customer experience
Ruler App
Physics Labs
In-app purchases
Ruler App
No in-app purchases
Physics Labs
No in-app purchases









