Comparison

RM vs mKer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

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.

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
Read full description

*** 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 call

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

CostPrice · In-app purchases · Ads · Monetization

RM costs $9.99 and mKer $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
RM versus mKer: the parameters behind the verdict, then further details
ParameterRMmKer
Price$9.99$3.99 — better
Rating4.6 (18 ratings) — better4.5 (22 ratings)
Positive reviews66.7% of reviews — better63.6% of reviews
Number of ratings1822 — better
Update frequencyEvery 10 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPad
Requires iOS9.0 — better13.0
Further details — not scored
Size35 MB57 MB
Age rating4+4+
DeveloperKai ArasAxart Labs OU

Customer experience

RM

All ratings18 ratings
Positive94.4%
Neutral0.0%
Negative5.6%
Written reviews6 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

mKer

All ratings20 ratings
Positive85.0%
Neutral5.0%
Negative10.0%
Written reviews11 reviews
Positive63.6%
Neutral9.1%
Negative27.3%

In-app purchases

None

RM

No in-app purchases

None

mKer

No in-app purchases

Questions

Is RM free?
RM costs $9.99, with no in-app purchases.
Is mKer free?
mKer costs $3.99, with no in-app purchases.
Which has better reviews, RM or mKer?
RM is rated higher. RM averages 4.6 out of 5 from 18 ratings, while mKer averages 4.5 from 22 ratings.
Do RM or mKer have ads?
Neither RM nor mKer shows ads.
Which is updated more often, RM or mKer?
RM ships an update every 10 months, and mKer every 3 weeks. Most recently, RM was updated on September 19, 2026 and mKer on August 22, 2026.

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