# WretchUp vs Krill Synthesizer

The clearest difference is rating: Krill Synthesizer at 5.0 against WretchUp's 3.1. Krill Synthesizer also leads on update cadence (weekly vs every 3 weeks) and review sentiment (100% vs 91%). WretchUp's advantage is price ($4.99 vs $11.99). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

WretchUp costs $4.99 and Krill Synthesizer $11.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Krill Synthesizer holds the better App Store score, 5.0 against 3.1. Both are backed by a comparable volume of ratings — 9 and 6 respectively. Written reviews point the same way: 91% of WretchUp's written reviews are positive against 100% of Krill Synthesizer's.

WretchUp ships an update every 3 weeks, Krill Synthesizer weekly. The most recent releases landed on October 3, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | WretchUp | Krill Synthesizer |
| --- | --- | --- |
| Price | **$4.99** | $11.99 |
| Rating | [3.1 (9 ratings)](https://appshunter.io/ios/app/wretchup/id928543264/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/krill-synthesizer/id6443337049/reviews)** |
| Number of ratings | **9** | 6 |
| Positive reviews | 90.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Paid | Paid |
| Size | 15 MB | 8 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MoMinstruments GbR](https://appshunter.io/developer/953815356) | [Genuine Soundware](https://appshunter.io/developer/1560880481) |

## What reviewers say

### WretchUp

[App page](https://appshunter.io/ios/app/wretchup/id928543264)

This app offers a unique audio manipulation experience, allowing users to create sonic mayhem with pitch-shifted delays, filters, and sampling. It's designed for live performance and studio use, enabling musicians and sound enthusiasts to generate wild noises and unique effects.

**Highlights:** Pitch-shifted delay with feedback and filter, Live performance-oriented controls, Gesture-based play, Record vocals and instruments, Sample and manipulate loops, Inter-App-Audio and Audiobus support

**Features:** Vision Pro support

**In-app purchases:** none


### Krill Synthesizer

[App page](https://appshunter.io/ios/app/krill-synthesizer/id6443337049)

This virtual analog polyphonic synthesizer offers a streamlined interface for creating quick synth sounds on iPad. It features two oscillators, an LFO, a low-pass filter, two envelopes, and stereo effects, all accessible from a single screen.

**Highlights:** Virtual analog polyphonic synthesizer, Single-screen interface, Two oscillators, One LFO, Low-pass filter, Stereo chorus and ping-pong delay, 64 presets

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is WretchUp free?

WretchUp costs $4.99, with no in-app purchases.

### Is Krill Synthesizer free?

Krill Synthesizer costs $11.99, with no in-app purchases.

### Which has better reviews, WretchUp or Krill Synthesizer?

Krill Synthesizer is rated higher. WretchUp averages 3.1 out of 5 from 9 ratings, while Krill Synthesizer averages 5.0 from 6 ratings.

### Do WretchUp or Krill Synthesizer have ads?

Neither WretchUp nor Krill Synthesizer shows ads.

### Which is updated more often, WretchUp or Krill Synthesizer?

WretchUp ships an update every 3 weeks, and Krill Synthesizer weekly. Most recently, WretchUp was updated on October 3, 2026 and Krill Synthesizer on October 11, 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.*