# synthQ vs ERS_250

The clearest difference is price: synthQ at $5.99 against ERS_250's $13.99. synthQ also leads on update cadence (every 3 months vs every 8 months). ERS_250's advantage is review sentiment (100% vs 80%) and device support (3 vs 1). On rating, ratings volume, ads and in-app purchases there is nothing between them.

synthQ costs $5.99 and ERS_250 $13.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.2 for synthQ against 4.3 for ERS_250. Both are backed by a comparable volume of ratings — 13 and 6 respectively. Written reviews are what separate them: 80% of synthQ's written reviews are positive against 100% of ERS_250's.

synthQ ships an update every 3 months, ERS_250 every 8 months. The most recent releases landed on June 1, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | synthQ | ERS_250 |
| --- | --- | --- |
| Price | **$5.99** | $13.99 |
| Rating | [4.2 (13 ratings)](https://appshunter.io/ios/app/synthq/id950094378/reviews) | **[4.3 (6 ratings)](https://appshunter.io/ios/app/ers-250/id1584339422/reviews)** |
| Number of ratings | **13** | 6 |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 8 months |
| Monetization | Paid | Paid |
| Size | 78 MB | 9 MB |
| Requires iOS | 12.0 | **9.3** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chris Niven](https://appshunter.io/developer/471645351) | [Christian Siedschlag](https://appshunter.io/developer/538434682) |

## What reviewers say

### synthQ

[App page](https://appshunter.io/ios/app/synthq/id950094378)

This music creation tool for iPad offers a unique module queuing system and a customizable interface for dynamic sound design. Create complex sounds with virtual cables, a resizable keyboard, and a wide array of modules for production, performance, and education.

**Highlights:** Customizable module queuing system, Virtual cable-based modulation, Resizable multi-octave keyboard, Extensive module library (oscillators, envelopes, filters, FX), Ableton Link support, MIDI input/output, Preset sharing and import

**Features:** macOS Compatibility

**In-app purchases:** none


### ERS_250

[App page](https://appshunter.io/ios/app/ers-250/id1584339422)

This audio plugin faithfully replicates the EMT 250, the first digital hardware reverb ever made. It offers adjustable decay time, frequency response, predelay, and a dry-wet ratio, with an optional modern schematic.

**Highlights:** Replication of original EMT 250 schematics, Adjustable reverb decay time (0.4-5s), Adjustable low and high frequency response, Adjustable predelay, Additional low-pass filter, Adjustable Dry-Wet ratio, Optional 'modern' schematics

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is synthQ free?

synthQ costs $5.99, with no in-app purchases.

### Is ERS_250 free?

ERS_250 costs $13.99, with no in-app purchases.

### Which has better reviews, synthQ or ERS_250?

ERS_250 is rated higher. synthQ averages 4.2 out of 5 from 13 ratings, while ERS_250 averages 4.3 from 6 ratings.

### Do synthQ or ERS_250 have ads?

Neither synthQ nor ERS_250 shows ads.

### Which is updated more often, synthQ or ERS_250?

synthQ ships an update every 3 months, and ERS_250 every 8 months. Most recently, synthQ was updated on June 1, 2026 and ERS_250 on September 21, 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.*