Megapixel Calculator vs Horizontal Accelerometer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Megapixel Calculator
This utility helps you understand screen and image resolutions. Calculate megapixels from dimensions or find dimensions from megapixels. It also includes a DPI calculator for screens.
- Calculate megapixels from dimensions
- Calculate dimensions from megapixels
- Determine aspect ratio
- DPI calculator
- Supports various resolutions
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Megapixel Calculator is very useful and informative app for understanding different resolutions. Just type number of megapixels and you will see all possible variations of screen, photo and camera resolutions. Or even more - type the resolution of your photo, screen or camera, and the app will tell you the aspect ratio and number of megapixels. Now app includes DPI calculator. Just input screen resolution and size in inches, and the DPI of the screen will be shown. Megapixel Calculator now includes: - Resolutions Calculator - Megapixel Calculator - DPI Calculator
Horizontal Accelerometer
This tool measures real-time horizontal acceleration, deceleration, and lateral G-force for automobiles. It features color-coded zones and sounds for easy understanding while driving and can also be used for engineering education and evaluating structural rigidity.
- Real-time horizontal acceleration measurement
- Measures deceleration and lateral G-force
- Color zones and sound alerts for values
- Calibration for accurate readings
- Peak hold and max value tracking
- Adjustable color zone thresholds and sound
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"Horizontal Accelerometer" is a tool that displays horizontal acceleration in real time. (Application) - Measures acceleration, deceleration, and lateral G of automobiles. The acceleration value in the direction felt by the driver is displayed. Color zones and sounds make acceleration values easy to understand even while driving. - Rigidity evaluation of table legs - The horizontal accelerometer allows engineering students to actually measure and feel the acceleration value, which is useful for understanding the equation of motion. (How to use) 1. Fix the iPhone on the object to be measured. No need to fix it horizontally. When measuring the acceleration of a car, fix the iPhone on the dashboard at an angle that makes it easy to see the screen and so as not to shake. When evaluating the rigidity of the table legs, place the iPhone on the table surface, and if the iPhone slips when the table is shaken, fix it with tape. 2. Tap the "Calibration" button, then tap the "Calibrate" button. The display of the horizontal acceleration value starts. In the case of a car, please stop the car on a horizontal road and then calibrate. (Screen display) - The number at the top of the screen is the value of real-time horizontal acceleration. - "Peak hold" is the peak value of horizontal acceleration. Reset after the set time. - ”Max" is the maximum value of horizontal acceleration. Reset with the “Reset Max" button. - Acceleration values can change to red and yellow depending on the threshold. (Calibration dialog) Tap the "Calibration" button to bring up the calibration dialog. - "Calibrate": Executes calibration in the current fixed state. - ”Recall Calibration": Recall the saved calibration. - "Save Calibration": Save the current calibration. - "List of useful apps": Displays a list of useful apps. (Setting dialog) Tap the "Setting" button to bring up the setting dialog. - "List of useful apps": Displays a list of useful apps. - “Setting": A setting window appears. (Setting window) - "Color zone(value(G) or more)": Color zone thresholds, color on/off, and sound on/off can be set. The default thresholds are Red 0.40 and Yellow 0.30. - "Peak hold time(s)": Peak hold time can be set. Default is 10. - "Harshness cut filter": Harshness cut filter on/off can be set. "Harshness" means impact vibration. - "Desensitization(%)": Desensitization rate can be set. Default is 0. (Remarks) - This app works on iPhone and iPad. - Tilting the device tilts the calibrated horizontal plane, so measurement error occurs. - The developer assumes no responsibility for any loss or claims by third parties which may arise from the use of this app.
Screenshots
Verdict
The clearest difference is update cadence: Horizontal Accelerometer at every 6 weeks against Megapixel Calculator's every 9 months. Horizontal Accelerometer also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.
Megapixel Calculator ships an update every 9 months, Horizontal Accelerometer every 6 weeks. The most recent releases landed on October 5, 2026 and October 7, 2026 respectively.
| Parameter | Megapixel Calculator | Horizontal Accelerometer |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | — | 50.0% of reviews |
| Number of ratings | 2 — better | — |
| Update frequency | Every 9 months | Every 6 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Tihomir Radev | Takao Ichimura |
Customer experience
Megapixel Calculator
Horizontal Accelerometer
In-app purchases
Megapixel Calculator
No in-app purchases
Horizontal Accelerometer
No in-app purchases
Questions
Is Megapixel Calculator free?
Is Horizontal Accelerometer free?
Do Megapixel Calculator or Horizontal Accelerometer have ads?
Which is updated more often, Megapixel Calculator or Horizontal Accelerometer?
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