# CrowdSense vs Altitude Correction

The clearest difference is iOS requirement: Altitude Correction at 9.3 against CrowdSense's 12.0. On price, ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | CrowdSense | Altitude Correction |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/crowdsense/id930853606/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free | — |
| Size | 2 MB | 18 MB |
| Requires iOS | 12.0 | **9.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kleomenis Katevas](https://appshunter.io/developer/526742174) | [Steger Grafix](https://appshunter.io/developer/376828168) |

## What reviewers say

### CrowdSense

[App page](https://appshunter.io/ios/app/crowdsense/id930853606)

This app allows researchers to collect rich mobile sensor data from iOS devices for studies. It prioritizes user control and transparency, requiring explicit permission before activating any sensor. Data collected can be easily accessed and exported for analysis.

**Highlights:** Continuous sensing with rich mobile sensor data, User control and explicit sensor permission, Support for a wide range of device sensors, Easy data access and export, Secure data sharing and USB export, Built on open-source SensingKit framework

**In-app purchases:** none


### Altitude Correction

[App page](https://appshunter.io/ios/app/altitude-correction/id1355616984)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CrowdSense free?

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

### Is Altitude Correction free?

Altitude Correction is free to download, with no in-app purchases.

### Do CrowdSense or Altitude Correction have ads?

Neither CrowdSense nor Altitude Correction shows ads.

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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.*