# Teslameter. vs OpenRadiation

The clearest difference is in-app purchases: OpenRadiation at none against Teslameter.'s 1. OpenRadiation also leads on ads (none vs shown) and update cadence (every 3 months vs every 12 months). Teslameter.'s advantage is iOS requirement (12.0 vs 15.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Teslameter. sells 1 one-off in-app purchase. OpenRadiation asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 2.0 for Teslameter. against 2.0 for OpenRadiation. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

Teslameter. ships an update every 12 months, OpenRadiation every 3 months. The most recent releases landed on June 9, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Teslameter. | OpenRadiation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (3 ratings)](https://appshunter.io/ios/app/teslameter/id976926346/reviews) | [2.0 (4 ratings)](https://appshunter.io/ios/app/openradiation/id1246249831/reviews) |
| Number of ratings | 3 | **4** |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | **Every 3 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 14 MB | 54 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [margaret kovatch](https://appshunter.io/developer/1039651981) | [Autorite de surete nucleaire et de radioprotection](https://appshunter.io/developer/1861431469) |

## What reviewers say

### Teslameter.

[App page](https://appshunter.io/ios/app/teslameter/id976926346)

This utility app measures electromagnetic fields around you using your device's compass. It displays readings on X, Y, and Z axes in micro-teslas, along with a magnitude reading. Primarily for entertainment, it detects interference from magnetic objects or potential paranormal activity.

**Highlights:** Measures electromagnetic fields, Displays X, Y, Z axis readings, Calculates magnitude reading, Detects magnetic object interference, For entertainment purposes

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### OpenRadiation

[App page](https://appshunter.io/ios/app/openradiation/id1246249831)

Measure ambient radioactivity levels and assess your exposure to ionizing radiation using a compatible sensor. Contribute to a citizen science project by sharing your measurements to build a collaborative database.

**Highlights:** Measure radioactivity levels, Assess radiation exposure, Contribute to citizen science, Collaborative data database, Share measurements, View data online

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Teslameter. free?

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

### Is OpenRadiation free?

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

### Which has better reviews, Teslameter. or OpenRadiation?

Teslameter. and OpenRadiation are both rated 2.0 out of 5 on the App Store, from 3 and 4 ratings respectively.

### Do Teslameter. or OpenRadiation have ads?

Teslameter. shows ads; OpenRadiation does not.

### Which is updated more often, Teslameter. or OpenRadiation?

Teslameter. ships an update every 12 months, and OpenRadiation every 3 months. Most recently, Teslameter. was updated on June 9, 2026 and OpenRadiation on June 1, 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.*