# Readius vs Magnetic Sensor

The clearest difference is ads: Readius at none against Magnetic Sensor's shown. Magnetic Sensor's advantage is update cadence (fortnightly vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Readius ships an update every 2 months, Magnetic Sensor fortnightly. The most recent releases landed on October 27, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Readius | Magnetic Sensor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 418 MB | 25 MB |
| Requires iOS | **14** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Shantou Institute of Ultrasonic Inst. Co., Ltd.](https://appshunter.io/developer/406261738) | [Seonggon Sim](https://appshunter.io/developer/1565259950) |

## What reviewers say

### Readius

[App page](https://appshunter.io/ios/app/readius/id6443592437)

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

**In-app purchases:** none


### Magnetic Sensor

[App page](https://appshunter.io/ios/app/magnetic-sensor/id6764468454)

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

**In-app purchases:** none


## Frequently asked questions

### Is Readius free?

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

### Is Magnetic Sensor free?

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

### Do Readius or Magnetic Sensor have ads?

Magnetic Sensor shows ads; Readius does not.

### Which is updated more often, Readius or Magnetic Sensor?

Readius ships an update every 2 months, and Magnetic Sensor fortnightly. Most recently, Readius was updated on October 27, 2026 and Magnetic Sensor on October 7, 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.*