RK vs MolliLooper
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- RK006 Master Hub management
- MIDI, CV/Gate control
- Preset design and saving
- Event filtering
- Clock processing
- Output mode configuration
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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)
MolliLooper
This real-time stereo effect app allows for instant looping and filtering of audio. Designed for live performance, it continuously records input for immediate playback and offers adjustable loop timing synced to a host clock. It also features a resonant filter and stutter/freeze capabilities.
- Real-time stereo looping
- Instant recording/looping
- Host clock sync
- Adjustable loop timing
- Lowpass/highpass resonant filter
- Stutter/freeze effect
- AUv3 plugin support
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Molli Looper is a realtime stereo effect for looping and filtering. Intended mainly as a live performance tool, no preparation is needed to trigger loop recording - input is constantly recorded in the background to be triggered whenever it is needed. Loop timing is synced to host clock, and can be adjusted from multi-bar loops right down to 16th note drills. The looped or unlooped audio is then passed though a lowpass -> neutral -> highpass resonant filter, based on a 4 pole ladder design for lush analogue style sound. You can use Molli Looper either as iOS Standalone app or as AUv3 plugin. FEATURES: - Combination of looper and stutter/freeze - Continuous recording: instant recording/looping - Runs in sync with host clock - Jumps to meaningful places in the recording: "Snap to grid" - Grid: 1/16, 1/8, 1/4, 1/2, 1, 2, 4, 8, 16, 32 beats - Ability to scroll through the recording - Lowpass/highpass resonant filter - Long Tap XY keeps filter position - Limiter/booster effect - Momentary Mode - Tap on Molli Looper icon for basic information
Screenshots
Verdict
The clearest difference is price: RK at Free against MolliLooper's $8.99. MolliLooper's advantage is review sentiment (82% vs 67%) and update cadence (every 2 months vs every 5 months). On rating, ratings volume, ads and in-app purchases 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
RK is free to download; MolliLooper costs $8.99 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 — 5.0 for RK against 5.0 for MolliLooper. Both are backed by a comparable volume of ratings — 9 and 13 respectively. Written reviews are what separate them: 67% of RK's written reviews are positive against 82% of MolliLooper's.
RK ships an update every 5 months, MolliLooper every 2 months. Both last shipped on October 24, 2026.
| Parameter | RK | MolliLooper |
|---|---|---|
| Price | Free — better | $8.99 |
| Rating | 5.0 (9 ratings) | 5.0 (13 ratings) |
| Positive reviews | 66.7% of reviews | 81.8% of reviews — better |
| Number of ratings | 9 | 13 — better |
| Update frequency | Every 5 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 13.0 | 11 — better |
| Further details — not scored | ||
| Size | 3 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Gerrit Dijkstra | Oliver Greschke (DE) |
Customer experience
RK
MolliLooper
In-app purchases
RK
No in-app purchases
MolliLooper
No in-app purchases









