# Retro Ringtone Composer vs PX1 FM Synth

The clearest difference is price: Retro Ringtone Composer at Free against PX1 FM Synth's $7.99. PX1 FM Synth's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence, device support and iOS requirement there is nothing between them.

Retro Ringtone Composer is free to download; PX1 FM Synth costs $7.99 up front. Retro Ringtone Composer sells 1 in-app purchase, starting at $2.99 per year. PX1 FM Synth asks for nothing beyond the download.

Retro Ringtone Composer ships an update monthly, PX1 FM Synth every 2 weeks. The most recent releases landed on October 16, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Retro Ringtone Composer | PX1 FM Synth |
| --- | --- | --- |
| Price | **Free** | $7.99 |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/px1-fm-synth/id6785258298/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | — | Paid |
| Size | 29 MB | 121 MB |
| Requires iOS | **16.0** | 17.6 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Kevser Erdem Alacan](https://appshunter.io/developer/1870340517) | [Peter Sjogren](https://appshunter.io/developer/1268263124) |

## What reviewers say

### Retro Ringtone Composer

[App page](https://appshunter.io/ios/app/retro-ringtone-composer/id6763496206)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual | $2.99 | per year |


### PX1 FM Synth

[App page](https://appshunter.io/ios/app/px1-fm-synth/id6785258298)

Create rich, wide stereo sounds with a dual-engine FM synthesizer. Explore classic 1980s digital synth tones, from electric pianos to metallic bells, with extensive operator and envelope controls. It functions as a standalone app or an AUv3 plugin for music production.

**Highlights:** Dual independent 6-operator FM engines, 32 classic FM algorithms, Per-operator envelopes and pan, Five macro knobs for sound shaping, Built-in reverb, AUv3 plugin support, Random patch generator

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Retro Ringtone Composer free?

Retro Ringtone Composer is free to download, with in-app purchases available.

### Is PX1 FM Synth free?

PX1 FM Synth costs $7.99, with no in-app purchases.

### Do Retro Ringtone Composer or PX1 FM Synth have ads?

Retro Ringtone Composer shows ads; PX1 FM Synth does not.

### Which is updated more often, Retro Ringtone Composer or PX1 FM Synth?

Retro Ringtone Composer ships an update monthly, and PX1 FM Synth every 2 weeks. Most recently, Retro Ringtone Composer was updated on October 16, 2026 and PX1 FM Synth on October 23, 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.*