# Tether vs Radius Alert

The clearest difference is update cadence: Radius Alert at every 2 days against Tether's every 12 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Tether ships an update every 12 months, Radius Alert every 2 days. The most recent releases landed on September 21, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Tether | Radius Alert |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 2 days** |
| Size | 14 MB | 10 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mykola Rudenko](https://appshunter.io/developer/1683884186) | [Kavinda Dilshan Paramsoodi](https://appshunter.io/developer/1696305106) |

## What reviewers say

### Tether

[App page](https://appshunter.io/ios/app/tether-parking-timer-location/id6751962404)

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

**In-app purchases:** none


### Radius Alert

[App page](https://appshunter.io/ios/app/radius-alert/id6752566436)

**In-app purchases:** none


## Frequently asked questions

### Is Tether free?

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

### Is Radius Alert free?

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

### Do Tether or Radius Alert have ads?

Neither Tether nor Radius Alert shows ads.

### Which is updated more often, Tether or Radius Alert?

Tether ships an update every 12 months, and Radius Alert every 2 days. Most recently, Tether was updated on September 21, 2026 and Radius Alert on September 20, 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.*