BK Partner vs RRS Ivoks
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BK Partner
Control your Roland BK-series instrument's sounds and accompaniments from your iPad. It mirrors the instrument's front panel for quick access to functions, tones, and rhythms. Supports Core MIDI and Roland Wireless Connection.
- Browse and select instrument tones
- Control musical accompaniments
- Duplicate instrument's front control panel on iPad
- Fast visual access to main functions
- Support for Core MIDI
- Support for Roland Wireless Connection
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This software application for iPad let you browse, select, and control the sounds ("Tones") and musical accompaniments ("Rhythms") of your Roland BK-series instrument. When using BK Partner you can: - Play your BK-series instrument while using your iPad as a duplication of its front control panel. This provides fast visual access to the BK's main functions, Tones, and Rhythms. Work with Core MIDI or Roland Wireless Connection (if supported by BK Instrument) *Note: The BK Partner can only display English texts.
RRS Ivoks
This app emulates analog synthesizers, offering a range of sound shaping tools including oscillators, filters, and amplifiers. It supports AUv3 hosting for integration with music production apps and provides extensive MIDI control.
- Analog Emulation
- AUv3 Compatible
- Dual Oscillators
- Filter Block with ADSR
- Amplifier Block with ADSR
- Modulation (LFO) Controls
- MIDI CC Implementation
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RRS Ivoks AUv3 instrument — comes as time-limited Demo-version for you to try. It gives you 5 minutes of Free play time. (You can reload the RRS Ivoks AUv3 instrument as many times as you want, thereby you get the Demo period again and again.) Unlimited version of RRS Ivoks AUv3 instrument comes as In-App Purchase. Features: • Analog Emulation; • Undo/Redo; • A/B comparison; • 2x/4x/8x Upsampling; • Macro controllers; • Scalable GUI. On the centre panel are located two audio-frequency oscillators: • OSC1 offers frequency Band regulator, five Waveforms and controls for LFO Modulation level plus OSC2 Cross-modulation; • OSC2 offers the same frequency Band and Waveforms, an independent control for Modulation depth, plus Detuning. Underneath these located the mixer, which offers level controls for the two Oscillators, the Noise generator, and Saturation Drive. To the right of these, located the filter block. The top half is a standard ADSR envelope — until you flip the switch «Envelope mode», when it becomes a repeating AD-envelope instead. The four controls at the bottom adjust Cut-off, Resonance, LPF to BPF switch, Modulation level and Envelope level. Next after the filter is the amplifier block, it also has ADSR envelope along with another Modulation level and Velocity sensitivity control. Again, the envelope can be switched to a Repeating Mode that generates a triangular waveform determined by the Attack and Decay settings, providing some of the instrument’s most distinctive effects. The leftmost panels house the Modulation (LFO) controls (top), Mode which offers four waveforms, including noise, and a stepped Function for sample & hold (S&H) effects, well as Speed control. And global settings such as the master Tune, master Volume, Legato mode, Monophonic and Duophonic operation and Unison switches, and the Glide control. To use Ivoks as an instrument, you need an AUv3-compatible host app like GarageBand, Auria, AUM, Cubasis and more — RRS Ivoks will appear in the list of Audio Unit instruments in the host app. MIDI CC Implementation Chart: • CC#003 => HQ • CC#009 => Saturation Drive • CC#014 => Modulator Speed • CC#015 => Modulator Mode • CC#020 => Filter Attack • CC#021 => AMP Attack • CC#022 => Filter Decay • CC#023 => AMP Decay • CC#024 => Filter Sustain • CC#025 => AMP Sustain • CC#026 => Filter Release • CC#027 => AMP Release • CC#028 => Filter Envelope Mode • CC#029 => AMP Envelope Mode • CC#030 => OSC1 Band • CC#031 => OSC2 Band • CC#085 => OSC1 Waveform • CC#086 => OSC2 Waveform • CC#087 => OSC1 XMod • CC#089 => OSC2 Detune • CC#090 => MOD to OSC1 • CC#102 => MOD to OSC2 • CC#103 => OSC1 Level • CC#104 => OSC2 Level • CC#105 => Noise Generator • CC#106 => Global Tune • CC#107 => Global Glide • CC#108 => Global Volume • CC#109 => Global Voice • CC#110 => Global Unison • CC#111 => Global Retrig • CC#112 => Filter Cut-off • CC#113 => Filter Resonance • CC#114 => Filter Mode • CC#115 => MOD to Filter • CC#116 => Filter Envelope • CC#117 => MOD to AMP • CC#118 => Velocity Sensitvity
Screenshots
Verdict
The clearest difference is in-app purchases: BK Partner at none against RRS Ivoks's 1. BK Partner also leads on iOS requirement (8.1 vs 10.0). RRS Ivoks's advantage is update cadence (fortnightly vs every 12 months) and rating (4.4 vs 4.0). On price, review sentiment 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
Both are free to download. RRS Ivoks sells 1 one-off in-app purchase. BK Partner asks for nothing beyond the download.
RRS Ivoks holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: RRS Ivoks has 46 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 61% of BK Partner's written reviews are positive against 63% of RRS Ivoks's.
BK Partner ships an update every 12 months, RRS Ivoks fortnightly. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.
| Parameter | BK Partner | RRS Ivoks |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (6 ratings) | 4.4 (46 ratings) — better |
| Positive reviews | 60.9% of reviews | 63.3% of reviews — better |
| Number of ratings | 6 | 46 — better |
| Update frequency | Every 12 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 8.1 — better | 10.0 |
| Further details — not scored | ||
| Size | 28 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Roland Corporation | RRS, OOO |
Customer experience
BK Partner
RRS Ivoks
In-app purchases
BK Partner
No in-app purchases
RRS Ivoks
- RRS Ivoks Unlimited$8.99









