# Tesla Field Meter vs NL Sensor

The clearest difference is price: NL Sensor at Free against Tesla Field Meter's $0.99. NL Sensor also leads on update cadence (every 2 weeks vs every 11 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

NL Sensor is free to download; Tesla Field Meter costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Tesla Field Meter ships an update every 11 months, NL Sensor every 2 weeks. The most recent releases landed on September 24, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Tesla Field Meter | NL Sensor |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[2.8 (9 ratings)](https://appshunter.io/ios/app/tesla-field-meter/id351080302/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 43.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 weeks** |
| Monetization | Paid | — |
| Size | 4 MB | 2 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [JMS Solutions, LLC](https://appshunter.io/developer/351080305) | [Nu Lambda Scientific Company Limited](https://appshunter.io/developer/6792283358) |

## What reviewers say

### Tesla Field Meter

[App page](https://appshunter.io/ios/app/tesla-field-meter/id351080302)

This application measures magnetic field strength, responding to both static and alternating fields. It helps users make a qualitative assessment of magnetic field exposure from various sources.

**Highlights:** Measures magnetic field magnitude, Responds to static magnetic fields, Responds to alternating magnetic fields, Qualitative strength assessment, Identifies field sources

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

**In-app purchases:** none


### NL Sensor

[App page](https://appshunter.io/ios/app/nl-sensor/id6792283356)

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

**In-app purchases:** none


## Frequently asked questions

### Is Tesla Field Meter free?

Tesla Field Meter costs $0.99, with no in-app purchases.

### Is NL Sensor free?

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

### Do Tesla Field Meter or NL Sensor have ads?

Neither Tesla Field Meter nor NL Sensor shows ads.

### Which is updated more often, Tesla Field Meter or NL Sensor?

Tesla Field Meter ships an update every 11 months, and NL Sensor every 2 weeks. Most recently, Tesla Field Meter was updated on September 24, 2026 and NL Sensor on October 9, 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.*