# ODNscan vs Magnetometer ∞

The clearest difference is in-app purchases: ODNscan at none against Magnetometer ∞'s 2. ODNscan also leads on ads (none vs shown). Magnetometer ∞'s advantage is update cadence (every 2 weeks vs every 10 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Magnetometer ∞ sells 2 in-app purchases, starting at $1.99 per 7 days. ODNscan asks for nothing beyond the download.

ODNscan ships an update every 10 months, Magnetometer ∞ every 2 weeks. The most recent releases landed on September 12, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | ODNscan | Magnetometer ∞ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (58 ratings)](https://appshunter.io/ios/app/magnetometer/id6753061844/reviews)** |
| Number of ratings | — | **58** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 17 MB | 16 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ocean Data Network](https://appshunter.io/developer/1689000347) | [Chen-Yu Wei](https://appshunter.io/developer/432767536) |

## What reviewers say

### ODNscan

[App page](https://appshunter.io/ios/app/odnscan/id6749337845)

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

**In-app purchases:** none


### Magnetometer ∞

[App page](https://appshunter.io/ios/app/magnetometer/id6753061844)

Visualize magnetic fields in real-time with precision charts and monitor X, Y, Z axis readings. Ideal for scientific research, education, and field work, this app offers professional-grade accuracy and an intuitive interface for easy data interpretation.

**Highlights:** Real-time magnetic field visualization, X, Y, Z axis readings in microteslas, Scientific research tool, Educational aid, Field work companion, Intuitive interface

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.99 | per 7 days |
| Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is ODNscan free?

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

### Is Magnetometer ∞ free?

Magnetometer ∞ is free to download, with in-app purchases available.

### Do ODNscan or Magnetometer ∞ have ads?

Magnetometer ∞ shows ads; ODNscan does not.

### Which is updated more often, ODNscan or Magnetometer ∞?

ODNscan ships an update every 10 months, and Magnetometer ∞ every 2 weeks. Most recently, ODNscan was updated on September 12, 2026 and Magnetometer ∞ on October 11, 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.*