RM vs mKer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RM
This audio effect app offers versatile modulation capabilities, including ring, amplitude, phase, and frequency modulation. It features a built-in carrier oscillator, multimode filter, envelope follower, and LFO for creating unique sounds. It can be used standalone or with other audio apps.
- Multiple modulation types (Ring, AM, FM, Phase)
- Built-in carrier oscillator
- Multimode filter (LP, HP, BP)
- Envelope follower and LFO
- Standalone and IAA/Audiobus support
- AUv3 plugin compatibility
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RM-1 Wave Modulator RM-1 is a multi purpose audio effect designed around various types of modulation. Featuring a built-in carrier oscillator, multimode filter, envelope follower and low frequency oscillator, RM-1 creates new sounds by combining carrier waveform and the audio input in different ways. Types of modulation: - Ring Modulation (virtual analog) - Ring Modulation (digital) - Amplitude Modulation - Phase Modulation (DX-style FM) - Frequency Modulation (linear) Overview: - Built-in carrier oscillator with variable wave-shape (sine->square) - Built-in multimode Filter (LP, HP, BP) - Built-in Envelope Follower and LFO Connectivity: - Standalone (MIC, USB audio) - IAA / Audiobus - AUv3 Plugin
mKer
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.
- 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
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*** Note *** Although mKer can run as a stand-alone app, the recommended way to use it is as an AUv3 plugin from inside a suitable AU Host app that supports MIDI Processors such as AUM, Audiobus, Cubasis etc. Please also note that mKer is a MIDI app/plugin. That means that it does not produce sound itself - it needs to be connected to an audio source that can receive MIDI. mKer is a versatile, multi-output MIDI step sequencer with an extensive range of features. These include: - 8 MIDI outputs - 64 Patterns - 16 Lanes (aka tracks) per Pattern - Independent number of Steps (1-32) and Step Size (1/64-256 beats) per Lane per Pattern - Every step can play either a single note, an interval (2 notes) or a chord (3 or 4 notes) - Lane Step parameters: Play Cycles, Skip Cycles, Play Offset Cycles, Pitch, Velocity, Probability, Offset (can be used for ‘swing’ like effects), Repeat (rachet) and Gate - A flexible Editor that includes a step entry keyboard, parameter sliders and a variety of options and utilities designed for to make the workflow intuitive and fast - 32 Clips with 1-8 Steps per Clip, 1-128 repeats per step (every clip step has one pattern) - 3 Play Modes: Pattern, Clip, Sequence (all Clips) - A Performance tab with 10 fully assignable MIDI sliders, a 12-snapshot bank and morphing function between the snapshots... - MIDI step input and real-time recording - 12-track beat generator with six genres, density, intensity and GM beat mapping ... and more!
Verdict
The clearest difference is update cadence: mKer at every 3 weeks against RM's every 10 months. mKer also leads on price ($3.99 vs $9.99). RM's advantage is iOS requirement (9.0 vs 13.0). On rating, review sentiment, ratings volume and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
RM costs $9.99 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 RM against 4.5 for mKer. Both are backed by a comparable volume of ratings — 18 and 22 respectively. Written reviews are what separate them: 67% of RM's written reviews are positive against 64% of mKer's.
RM ships an update every 10 months, mKer every 3 weeks. The most recent releases landed on September 19, 2026 and August 22, 2026 respectively.
| Parameter | RM | mKer |
|---|---|---|
| Price | $9.99 | $3.99 — better |
| Rating | 4.6 (18 ratings) — better | 4.5 (22 ratings) |
| Positive reviews | 66.7% of reviews — better | 63.6% of reviews |
| Number of ratings | 18 | 22 — better |
| Update frequency | Every 10 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPad | iPad |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 35 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | Kai Aras | Axart Labs OU |
Customer experience
RM
mKer
In-app purchases
RM
No in-app purchases
mKer
No in-app purchases









