# Uber Synth vs iStem

The clearest difference is price: iStem at Free against Uber Synth's $3.99. Uber Synth's advantage is in-app purchases (none vs 1) and iOS requirement (14.0 vs 16.0). On ads and device support there is nothing between them.

iStem is free to download; Uber Synth costs $3.99 up front. iStem sells 1 one-off in-app purchase. Uber Synth asks for nothing beyond the download.

## The numbers

| Metric | Uber Synth | iStem |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/uber-synth/id601766687/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Paid | — |
| Size | 7 MB | 79 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mark Carlotto](https://appshunter.io/developer/293347135) | [Jan Maes](https://appshunter.io/developer/1550506252) |

## What reviewers say

### Uber Synth

[App page](https://appshunter.io/ios/app/uber-synth/id601766687)

This app offers a polyphonic multi-timbral FM synthesizer for iOS devices. It features a triple-oscillator sound engine with five distinct multi-timbral options for creating evolving and complex soundscapes. Supports Audiobus for integration with other music apps.

**Highlights:** Polyphonic multi-timbral FM synthesizer, Triple-oscillator cross-modulated FM engine, Five multi-timbral options, Sound map and sound palettes, Evolving sound generation, Audiobus support

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

**In-app purchases:** none


### iStem

[App page](https://appshunter.io/ios/app/istem/id6793296941)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iStem Activation | $4.99 | one-time |


## Frequently asked questions

### Is Uber Synth free?

Uber Synth costs $3.99, with no in-app purchases.

### Is iStem free?

iStem is free to download, with in-app purchases available.

### Do Uber Synth or iStem have ads?

Neither Uber Synth nor iStem shows ads.

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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.*