# KASPAR vs mKer

The clearest difference is price: mKer at $3.99 against KASPAR's $19.99. mKer also leads on update cadence (every 3 weeks vs every 16 months). KASPAR's advantage is review sentiment (75% vs 64%) and ratings volume (91 vs 22). On rating, ads, in-app purchases and monetization model there is nothing between them.

KASPAR costs $19.99 and mKer $3.99 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 — 4.6 for KASPAR against 4.5 for mKer. Both are backed by a comparable volume of ratings — 91 and 22 respectively. Written reviews are what separate them: 75% of KASPAR's written reviews are positive against 64% of mKer's.

KASPAR ships an update every 16 months, mKer every 3 weeks. Both last shipped on October 6, 2026.

## The numbers

| Metric | KASPAR | mKer |
| --- | --- | --- |
| Price | $19.99 | **$3.99** |
| Rating | **[4.6 (91 ratings)](https://appshunter.io/ios/app/kaspar/id1245045964/reviews)** | [4.5 (22 ratings)](https://appshunter.io/ios/app/mker/id1635296839/reviews) |
| Number of ratings | **91** | 22 |
| Positive reviews | **75.0% of reviews** | 63.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 3 weeks** |
| Monetization | Paid | Paid |
| Size | 64 MB | 57 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yonac Inc.](https://appshunter.io/developer/288670023) | [Axart Labs OU](https://appshunter.io/developer/1814434331) |

## What reviewers say

### KASPAR

[App page](https://appshunter.io/ios/app/kaspar/id1245045964)

This powerful synthesizer app offers 8 polyphonic engines with extensive morphing, layering, and modulation capabilities. Create complex sounds with 24 oscillators, 8 filters, and built-in stereo effects. It integrates seamlessly with DAWs and other music apps.

**Highlights:** 8 polyphonic synth engines, Multi-Engine Automorphing, Extensive modulation system, Poly aftertouch support, 2 stereo FX busses, Audio Unit plugin integration, Inter-App Audio and Audiobus support

**In-app purchases:** none

**What reviewers like**

- ✨ Incredible power and depth
- 🔊 Amazing and unique sound quality
- 👍 Easy to use and intuitive UI
- 💡 Highly configurable and flexible
- 🎛️ Advanced sound shaping possibilities

**What reviewers complain about**

- 🐛 Occasional crashes and instability
- 💻 High CPU usage
- 🐞 Bugs in AUv3 implementation
- 🖼️ UI scaling issues in some DAWs
- 🤔 Presets can be uninspired or limited

**Reported bugs**

- Sound muted in solo mode for some synths
- Synth crashes when loading as AUv3 in Roland Zenbeats
- FX chain not working
- Program change messages not followed as AUv3 in Cubasis internal track
- UI does not scale to full screen in Cubasis 3

**Requested features**

- Add a step sequencer
- Improve preset variety and inspiration
- Fix AUv3 program change issues
- Address UI scaling problems in DAWs
- Implement MIDI out functionality


### mKer

[App page](https://appshunter.io/ios/app/mker/id1635296839)

A versatile MIDI step sequencer designed for music creation. It offers multiple outputs, extensive pattern and lane customization, and advanced step editing. Best used within an AUv3 host app for sound generation.

**Highlights:** 8 MIDI outputs, 64 Patterns with 16 Lanes each, Customizable Steps and Step Size per Lane, Advanced Step Parameters (Pitch, Velocity, Probability, etc.), Flexible Editor with Step Entry Keyboard, 32 Clips with Repeat Functionality, Performance Tab with Assignable Sliders and Morphing

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KASPAR free?

KASPAR costs $19.99, with no in-app purchases.

### Is mKer free?

mKer costs $3.99, with no in-app purchases.

### Which has better reviews, KASPAR or mKer?

KASPAR is rated higher. KASPAR averages 4.6 out of 5 from 91 ratings, while mKer averages 4.5 from 22 ratings.

### Do KASPAR or mKer have ads?

Neither KASPAR nor mKer shows ads.

### Which is updated more often, KASPAR or mKer?

KASPAR ships an update every 16 months, and mKer every 3 weeks. Most recently, KASPAR was updated on October 6, 2026 and mKer on October 6, 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.*