# Radonsystem vs Speedometer

The clearest difference is in-app purchases: Radonsystem at none against Speedometer's 10. Radonsystem also leads on ads (none vs shown) and iOS requirement (13.0 vs 26.0). Speedometer's advantage is update cadence (every 2 months vs every 23 months). On price and device support there is nothing between them.

Both are free to download. Speedometer sells 10 in-app purchases, starting at $1.99 per 7 days. Radonsystem asks for nothing beyond the download.

Radonsystem ships an update every 23 months, Speedometer every 2 months. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Radonsystem | Speedometer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 23 months | **Every 2 months** |
| Size | 4 MB | 10 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alexander Bernitt](https://appshunter.io/developer/1551635659) | [Sandeep Bhandari](https://appshunter.io/developer/794284640) |

## What reviewers say

### Radonsystem

[App page](https://appshunter.io/ios/app/radonsystem/id1551635657)

**Features:** macOS Compatibility

**In-app purchases:** none


### Speedometer

[App page](https://appshunter.io/ios/app/speedometer-gps-mph-and-kmh/id6761403290)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $1.99 | per 7 days |
| Speedometer Pro — Weekly | $4.99 | per 7 days |
| Monthly Subscription | $4.99 | per month |
| Yearly Subscription Discount | $14.99 | per year |
| Yearly Subscription Sale | $14.99 | per year |
| Yearly Subscription Special | $19.99 | per year |
| Speedometer Pro — Annual | $29.99 | per year |
| Yearly Subscription | $29.99 | per year |
| Forever Pro Discount | $79.99 | one-time |
| Pro Unlock: Lifetime | $99.99 | one-time |


## Frequently asked questions

### Is Radonsystem free?

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

### Is Speedometer free?

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

### Do Radonsystem or Speedometer have ads?

Speedometer shows ads; Radonsystem does not.

### Which is updated more often, Radonsystem or Speedometer?

Radonsystem ships an update every 23 months, and Speedometer every 2 months. Most recently, Radonsystem was updated on October 27, 2026 and Speedometer on October 25, 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.*