Comparison

Harmony Eight vs mKer

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

Head to head
About

Harmony Eight

Create up to eight distinct pitch-shifted voices from your audio input. Position each voice in stereo space, alter their character from male to female, and apply individual feedback delays for intricate rhythms. Offers advanced audio processing including EQ, compression, and reverb.

Highlights
  • 8-voice pitch shifting with formant correction
  • Independent delay lines with sync
  • Spatial voice positioning
  • Vocal character modification
  • Parametric EQ, Compressor, Limiter, Noise Gate
  • Ensemble and Reverb effects
  • AUv3, Inter-app audio, Audiobus support
Features
Read full description

Up to eight pitch shifted voices are created from vocal input or instruments. Separate algorithms for optimal shifting of vocals/monophonic instruments and for any other kind of audio. Position each voice in space ( left and right / front and back ) Modify the voice character from male to female and vice versa. Pitch shift each voice in the range of +/- one octave with preserving of formants for natural sound. Applying separate feedback delays on each voice creates complex rhythmical patterns. Features: • 8 Voice Pitch Shifter with formant correction • Optional shifting algorithm for polyphonic sounds • 8 Independent delay lines with optional sync • Spatial voice positioning • Parametric Equalizer • Integrated Compressor/Limiter/Noise Gate • Ensemble effect • Reverb effect • AudioUnit for AUv3 compatible hosts. • Inter-app audio compatible effect. • Audiobus 2 compatible with state saving. • Support for Ableton Link • Low latency live usage with mic and headphones. • Audio recorder

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!

Screenshots

Harmony Eight3 screens

Verdict

The call

The clearest difference is update cadence: Harmony Eight at weekly against mKer's every 3 weeks. Harmony Eight also leads on review sentiment (75% vs 64%) and device support (3 vs 1). mKer's advantage is rating (4.5 vs 4.3). On ratings volume, ads, in-app purchases and monetization model 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

Harmony Eight costs $2.99 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

mKer holds the better App Store score, 4.5 against 4.3. Both are backed by a comparable volume of ratings — 11 and 22 respectively. Written reviews complicate that: 75% of Harmony Eight's written reviews are positive against 64% of mKer's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Harmony Eight ships an update weekly, mKer every 3 weeks. The most recent releases landed on September 11, 2026 and September 18, 2026 respectively.

Scorecard6 real differences · 4 level
Harmony Eight versus mKer: the parameters behind the verdict, then further details
ParameterHarmony EightmKer
Price$2.99 — better$3.99
Rating4.3 (11 ratings)4.5 (22 ratings) — better
Positive reviews75.0% of reviews — better63.6% of reviews
Number of ratings1122 — better
Update frequencyWeekly — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS8.0 — better13.0
Further details — not scored
Size17 MB57 MB
Age rating4+4+
DeveloperHarry GohsAxart Labs OU

Customer experience

Harmony Eight

All ratings11 ratings
Positive72.7%
Neutral27.3%
Negative0.0%
Written reviews16 reviews
Positive75.0%
Neutral12.5%
Negative12.5%

mKer

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

In-app purchases

None

Harmony Eight

No in-app purchases

None

mKer

No in-app purchases

Questions

Is Harmony Eight free?
Harmony Eight costs $2.99, with no in-app purchases.
Is mKer free?
mKer costs $3.99, with no in-app purchases.
Which has better reviews, Harmony Eight or mKer?
mKer is rated higher. Harmony Eight averages 4.3 out of 5 from 11 ratings, while mKer averages 4.5 from 22 ratings.
Do Harmony Eight or mKer have ads?
Neither Harmony Eight nor mKer shows ads.
Which is updated more often, Harmony Eight or mKer?
Harmony Eight ships an update weekly, and mKer every 3 weeks. Most recently, Harmony Eight was updated on September 11, 2026 and mKer on September 18, 2026.

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