# ISFM vs Pérola FM

The clearest difference is update cadence: ISFM at every 2 months against Pérola FM's every 17 months. ISFM also leads on iOS requirement (12.0 vs 15.1). 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.

ISFM ships an update every 2 months, Pérola FM every 17 months. The most recent releases landed on October 7, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | ISFM | Pérola FM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/isfm/id1499696671/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 17 months |
| Monetization | Free | — |
| Size | 27 MB | 30 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | +4 |
| Developer | [Goldtowersystemcompany Ltda](https://appshunter.io/developer/1636681757) | [Ti Indiquei Soluções Web e Mobile](https://appshunter.io/developer/1582841152) |

## What reviewers say

### ISFM

[App page](https://appshunter.io/ios/app/isfm/id1499696671)

This app brings the sounds of the São Paulo coast to your device, featuring a mix of pop, rock, reggae, indie, and surf music. It's designed for those who embrace beach culture, extreme sports, and a laid-back lifestyle.

**Highlights:** Coastal São Paulo radio station, Pop, Rock, Reggae, Indie, Surf Music, Beach and extreme sports lifestyle, Interactive programming, Caiçara style music

**Features:** macOS Compatibility

**In-app purchases:** none


### Pérola FM

[App page](https://appshunter.io/ios/app/perola-fm/id1634405847)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ISFM free?

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

### Is Pérola FM free?

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

### Do ISFM or Pérola FM have ads?

Neither ISFM nor Pérola FM shows ads.

### Which is updated more often, ISFM or Pérola FM?

ISFM ships an update every 2 months, and Pérola FM every 17 months. Most recently, ISFM was updated on October 7, 2026 and Pérola FM on October 27, 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.*