Comparison

apeMatrix vs RK

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

Head to head
About

apeMatrix

This app acts as a powerful host for audio plugins, allowing users to connect and automate various aspects of music creation. It facilitates the integration of favorite FX, MIDI routing, and control over built-in and external plugin parameters.

Highlights
  • Audio Unit and Inter-App Audio support
  • MIDI and audio routing
  • Control Manager for parameter modulation
  • Multiple Matrix grids for plugin hosting
  • MIDI Patch-bay for routing
  • High-quality audio processing
Features
Read full description

Holding true to the standard of apeSoft, apeMatrix continues to push the limits of possibilities in music creation. Automating almost every aspect of linked control, apeMatrix brings all your creation tools together and links them both in MIDI and audio. Letting you inject all your favorite FX both AU and IAA in a very easy and intuitive way. apeMatrix can also assign its Control Manager MIDI, Accelerometer, Scrub and LFO’s to modulate every built-in parameter and any parameter available inside the AUv3 (Audio Unit Plugins). apeMatrix offers 10 slots on each of the three Matrix grids with 2 bus slots on each grid that make it possible to interconnect all 3 Matrix. The MIDI Patch-bay also offers endless possibilities for MIDI routing and control in a similar grid design for both internal and external MIDI control. So you can send and receive MIDI and have ultimate control over where it’s routed. Each Audio Connection on the grid has its own gain control. Just tap on the node and drag will give you the full range of volume control. Or use Mixer to controls the RAU output and automate them using apeSoft’s unique Control Manager MIDI, Accelerometer, Scrub and LFO’s to modulate every built-in parameter and any parameter available inside the AUv3 (Audio Unit Plugins). Turn each slot on or off by a control switch on the Matrix or MIDI control. Control output, pan, mute and solo of each slot and Master output of each Matrix with the built in mixer control or MIDI control. Route your sounds through all a series of FX or route multiple sounds through the very some FX. The possibilities are as endless as your creativity. FEATURES High quality audio up to 32-bit 96kHz Supports Audio Unit extensions, Inter-App Audio Supports multi-channel inputs/outputs audio interfaces Supports Audio Unit Multi-bus input/output (side-chaining) 3 Matrix Audio 3 MIDI Matrix 10 Open Slots per Matrix (hosts up to 30 plugins) 2 Audio Bus Slots per Matrix 2 MIDI Bus Slots per Matrix MIDI Monitor Multi-Channel Audio Route AudioUnit Audio Send Receive Buses MIDI Scale Filtering, Transpose etc… Control Manager (MIDI, Accelerometer, LFO, Scrub) for all Built-In Parameters Control Manager (MIDI, Accelerometer, LFO, Scrub) for all AUv3 (Audio Unit Plugins) Presets Manager and Morphing Pad Save Custom AUv3 Presets Session Saving/Load Save/Load View’s Frame in Presets Transport to sends host sync to Audio Unit plugins and IAA Integrated and configurable MIDI keyboard with scales Connections output and panning controls Post Dynamic Processor Audiobus and Inter-Audio App (Sender and Fx) Audiobus state saving Ableton Link Precise MIDI Clock In/Out AudioShare Compatible AudioCopy Compatible MIDI Manager: Virtual Midi and Network, 14 bit NRPN controllers File Manager, sharing common audio files via iTunes, Dropbox and AudioCopy etc… Variable Sampling Rate (up to 96 kHz) Variable Buffering Size Variable UI Color Schemes BUILT-IN AUv3 (compatibles with other audio hosts) Configurable Sampler with scrub, playable via MIDI V-Meters Oscilloscope/Spectralscope Sender/Receiver (up to 16 buses) Send MIDI messages with LFO Gain/Pan

About

RK

Manage your RK006 Master Hub with this app. Design and save configurations, set up presets for event filtering, clock processing, and output modes. Connect your iOS device to MIDI, CV/Gate, and control it from your DAW.

Highlights
  • RK006 Master Hub management
  • MIDI, CV/Gate control
  • Preset design and saving
  • Event filtering
  • Clock processing
  • Output mode configuration
Features
Read full description

This is the manager-app for the RK006 Master Hub. The RK006 features a 12 bus(yes, 12x16 channel MIDI Handling) MIDI Interface and and ultra stable MIDI clock generator. It can MIDI merge from it's two TRS-A MIDI Inputs and even add four self-hosted USBMIDI devices to the stream. It is able to connect your iOS device not only to MIDI but also act as a CV/Gate source with control straight from your DAW. Add extensive MIDI filters and even built-in polychaining to make this the go-to tool for any setup. This app is an iOS port from the online webMIDI portal. It allows you to design and save configurations in the RK006. Via this app you can setup presets which can handle event filtering, clock processing and RK006 port output modes (MIDI/Gate/CV) Some review snippets: "The RK006 is a game changer, making sync, MIDI and signal processing easy, even without a DAW." (juno.co.uk) "Retrokits prove themselves invaluable once again to our increasingly complex and confusing desktop hardware setups." (gearnews.com) "Incredibly versatile hub for MIDI, USB and modular, and probably the only MIDI interface you’ll ever need in or out of the studio." (Sound on Sound)

Screenshots

apeMatrix4 screens
RK4 screens

Verdict

The call

The clearest difference is price: RK at Free against apeMatrix's $14.99. RK also leads on rating (5.0 vs 4.7) and iOS requirement (13.0 vs 15.6). apeMatrix's advantage is update cadence (monthly vs every 5 months) and ratings volume (84 vs 9). On ads, in-app purchases and device support 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

RK is free to download; apeMatrix costs $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

RK holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: apeMatrix has 84 ratings behind it against 9, so its average is the more settled of the two. Written reviews complicate that: 75% of apeMatrix's written reviews are positive against 67% of RK's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

apeMatrix ships an update monthly, RK every 5 months. The most recent releases landed on September 21, 2026 and July 31, 2026 respectively.

Scorecard7 real differences · 3 level
apeMatrix versus RK: the parameters behind the verdict, then further details
ParameterapeMatrixRK
Price$14.99Free — better
Rating4.7 (84 ratings)5.0 (9 ratings) — better
Positive reviews75.0% of reviews — better66.7% of reviews
Number of ratings84 — better9
Update frequencyMonthly — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.613.0 — better
Further details — not scored
Size20 MB3 MB
Age rating4+4+
DeveloperapeSoftGerrit Dijkstra

Customer experience

apeMatrix

All ratings84 ratings
Positive90.5%
Neutral6.0%
Negative3.6%
Written reviews32 reviews
Positive75.0%
Neutral9.4%
Negative15.6%

RK

All ratings9 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

In-app purchases

None

apeMatrix

No in-app purchases

None

RK

No in-app purchases

Questions

Is apeMatrix free?
apeMatrix costs $14.99, with no in-app purchases.
Is RK free?
RK is free to download, with no in-app purchases.
Which has better reviews, apeMatrix or RK?
RK is rated higher. apeMatrix averages 4.7 out of 5 from 84 ratings, while RK averages 5.0 from 9 ratings.
Do apeMatrix or RK have ads?
Neither apeMatrix nor RK shows ads.
Which is updated more often, apeMatrix or RK?
apeMatrix ships an update monthly, and RK every 5 months. Most recently, apeMatrix was updated on September 21, 2026 and RK on July 31, 2026.

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