# Sonar vs Smart FM

The clearest difference is update cadence: Sonar at every 6 weeks against Smart FM's every 23 months. Sonar also leads on device support. On price, in-app purchases and iOS requirement there is nothing between them.

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

Sonar ships an update every 6 weeks, Smart FM every 23 months. The most recent releases landed on October 4, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Sonar | Smart FM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | **Every 6 weeks** | Every 23 months |
| Size | 144 MB | 5 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 12+ | 17+ |
| Developer | [RDF Media](https://appshunter.io/developer/1646684757) | [Jean Arocutipa](https://appshunter.io/developer/1625527531) |

## What reviewers say

### Sonar

[App page](https://appshunter.io/ios/app/sonar/id1635841458)

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

**In-app purchases:** none


### Smart FM

[App page](https://appshunter.io/ios/app/smart-fm/id6535692897)

**In-app purchases:** none


## Frequently asked questions

### Is Sonar free?

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

### Is Smart FM free?

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

### Which is updated more often, Sonar or Smart FM?

Sonar ships an update every 6 weeks, and Smart FM every 23 months. Most recently, Sonar was updated on October 4, 2026 and Smart FM on October 5, 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.*