# Synth I.A. vs Convert MP3 to MP4

The clearest difference is update cadence: Synth I.A. at every 6 days against Convert MP3 to MP4's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Synth I.A. sells 1 in-app purchase, starting at $4.99 per month and Convert MP3 to MP4 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Synth I.A. ships an update every 6 days, Convert MP3 to MP4 every 2 months. Both last shipped on October 30, 2026.

## The numbers

| Metric | Synth I.A. | Convert MP3 to MP4 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 2 months |
| Size | 16 MB | 16 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Maxime Pontoire](https://appshunter.io/developer/525396222) | [Antonio Gonzalez de la aleja german](https://appshunter.io/developer/1839645711) |

## What reviewers say

### Synth I.A.

[App page](https://appshunter.io/ios/app/synth-ia/id6745096328)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Subscription | $4.99 | per month |


### Convert MP3 to MP4

[App page](https://appshunter.io/ios/app/convert-mp3-to-mp4/id6754396261)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Synth I.A. free?

Synth I.A. is free to download, with in-app purchases available.

### Is Convert MP3 to MP4 free?

Convert MP3 to MP4 is free to download, with in-app purchases available.

### Do Synth I.A. or Convert MP3 to MP4 have ads?

Neither Synth I.A. nor Convert MP3 to MP4 shows ads.

### Which is updated more often, Synth I.A. or Convert MP3 to MP4?

Synth I.A. ships an update every 6 days, and Convert MP3 to MP4 every 2 months. Most recently, Synth I.A. was updated on October 30, 2026 and Convert MP3 to MP4 on October 30, 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.*