# Mobile Science vs Circle Calculator

The clearest difference is in-app purchases: Mobile Science at none against Circle Calculator's 7. Mobile Science also leads on ads (none vs shown) and iOS requirement (6.0 vs 13.0). Circle Calculator's advantage is update cadence (every 5 weeks vs every 79 months). On price and device support there is nothing between them.

Both are free to download. Circle Calculator sells 7 in-app purchases, starting at $1.99 per 7 days. Mobile Science asks for nothing beyond the download.

Mobile Science ships an update every 79 months, Circle Calculator every 5 weeks. Both last shipped on October 16, 2026.

## The numbers

| Metric | Mobile Science | Circle Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (3 ratings)](https://appshunter.io/ios/app/mobile-science-acceleration/id389821809/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 79 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 1 MB | 72 MB |
| Requires iOS | **6.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Indiana University](https://appshunter.io/developer/383456988) | [AHMET DEMIR](https://appshunter.io/developer/1849165331) |

## What reviewers say

### Mobile Science

[App page](https://appshunter.io/ios/app/mobile-science-acceleration/id389821809)

Record, graph, and email accelerometer measurements from your device. Analyze motion along a single axis to measure acceleration, velocity, and distance. Offers real-time graphing and calibration options for accurate data collection.

**Highlights:** Record accelerometer measurements, Graph acceleration, velocity, and distance, Email recorded data, Adjust sample rate, Calibrate axis values, Real-time axis value display

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Circle Calculator

[App page](https://appshunter.io/ios/app/circle-calculator-geometry/id6760240001)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Circle Pro Weekly | $1.99 | per 7 days |
| Circle Pro Weekly | $3.99 | per 7 days |
| Circle Pro Monthly | $3.99 | per month |
| Circle Pro Monthly | $7.99 | per month |
| Circle Pro Annual | $24.99 | per year |
| Circle Pro Annual | $49.99 | per year |
| Circle Calculator Pro Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Mobile Science free?

Mobile Science is free to download, with no in-app purchases.

### Is Circle Calculator free?

Circle Calculator is free to download, with in-app purchases available.

### Do Mobile Science or Circle Calculator have ads?

Circle Calculator shows ads; Mobile Science does not.

### Which is updated more often, Mobile Science or Circle Calculator?

Mobile Science ships an update every 79 months, and Circle Calculator every 5 weeks. Most recently, Mobile Science was updated on October 16, 2026 and Circle Calculator on October 16, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*