# Sensor Logger vs Magnetometer

The clearest difference is price: Sensor Logger at Free against Magnetometer's $0.99. Sensor Logger also leads on update cadence (weekly vs every 34 months) and rating (4.8 vs 4.4). Magnetometer's advantage is review sentiment (86% vs 44%) and in-app purchases (none vs 6). On ads and iOS requirement there is nothing between them.

Sensor Logger is free to download; Magnetometer costs $0.99 up front. Sensor Logger sells 6 in-app purchases, starting at $4.99 per month. Magnetometer asks for nothing beyond the download.

Sensor Logger holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: Sensor Logger has 111 ratings behind it against 13, so its average is the more settled of the two. Written reviews complicate that: 44% of Sensor Logger's written reviews are positive against 86% of Magnetometer's, so the app with the better star average is not the one people write more warmly about.

Sensor Logger ships an update weekly, Magnetometer every 34 months. The most recent releases landed on October 1, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Sensor Logger | Magnetometer |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.8 (111 ratings)](https://appshunter.io/ios/app/sensor-logger/id1531582925/reviews)** | [4.4 (13 ratings)](https://appshunter.io/ios/app/magnetometer/id1662997574/reviews) |
| Number of ratings | **111** | 13 |
| Positive reviews | 44.4% of reviews | **85.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 34 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 81 MB | 2 MB |
| Requires iOS | 16.4 | **16.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Logger Labs LTD](https://appshunter.io/developer/1531583287) | [Bogdan Gavriluta](https://appshunter.io/developer/1584690995) |

## What reviewers say

### Sensor Logger

[App page](https://appshunter.io/ios/app/sensor-logger/id1531582925)

This app collects and displays data from various device sensors, including motion, GPS, and audio. It offers background recording, interactive plots, and multiple export formats. Advanced features allow for data streaming, systematic data collection from other users, and creating shareable data-driven dashboards.

**Highlights:** One-tap logging, Background recording, Interactive plot visualization, Data streaming (HTTP/MQTT), CSV, JSON, Excel, KML exports, Create and share data dashboards, Systematic data collection studies

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Monthly | $4.99 | per month |
| Pro Monthly | $9.99 | per month |
| Ultimate Monthly | $24.99 | per month |
| Plus Yearly | $49.99 | per year |
| Pro Yearly | $99.99 | per year |
| Ultimate Yearly | $249.99 | per year |


### Magnetometer

[App page](https://appshunter.io/ios/app/magnetometer/id1662997574)

This application uses your iPhone's compass to detect electromagnetic interference, helping you find metal objects or magnets. It's designed for fun and experimental purposes, not as a professional tool. Discover hidden metal items or simply explore the magnetic fields around you.

**Highlights:** Detects metal and magnets, Uses iPhone's compass, Measures EMF interference, Fun and experimental use, Simple user interface

**In-app purchases:** none


## Frequently asked questions

### Is Sensor Logger free?

Sensor Logger is free to download, with in-app purchases available.

### Is Magnetometer free?

Magnetometer costs $0.99, with no in-app purchases.

### Which has better reviews, Sensor Logger or Magnetometer?

Sensor Logger is rated higher. Sensor Logger averages 4.8 out of 5 from 111 ratings, while Magnetometer averages 4.4 from 13 ratings.

### Do Sensor Logger or Magnetometer have ads?

Neither Sensor Logger nor Magnetometer shows ads.

### Which is updated more often, Sensor Logger or Magnetometer?

Sensor Logger ships an update weekly, and Magnetometer every 34 months. Most recently, Sensor Logger was updated on October 1, 2026 and Magnetometer on September 22, 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.*