rrarrow vs MIDI FX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
rrarrow
Create experimental audio effects with extended feedback capabilities. This modular noise machine offers a simplified interface for fast assembly and flexible connectivity, allowing you to control processing parameters with the audio signal itself.
- Modular audio effect processing
- Extended feedback capabilities
- 20 audio processing blocks
- Built-in audio recorder
- MIDI controller support
- Audiobus and Inter-App Audio support
- Background audio playback
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rrarrow is the experimental noise machine / modular audio effect for the iOS featuring extended feedback capabilities. Key features: - Simplicity. The interface is simplified for faster assembly and more flexible connectivity — you can assemble your effect very fast and control all the processing parameters with the audio signal! - Feedback capabilities. You can add feedbacks to the audio chain to get some chaotic noise sounds . - 20 blocks for audio processing: - Sine generator. Basic oscillator with sine waveform - Saw and square oscillators - Signal multiplier - Delay - Frequency shifter - Envelope follower - “Lorenz attractor” - Quantizer - Sample-and-hold - Reverb - Special Lowpass filter - Clipper - Nonlinear shaper (for self-oscillating circuit) - two special waveshaping modules with “fold” and “wrap” distortion blocks that work with audiofiles: - lookup table. Loads up to 10 seconds of audiofile to be used as nonlinear transfer function - Players with/without interpolation and speed control - "scrub" block for semi-random granular file playback - Built-in audio recorder. Share the audio file to other applications or AudioShare. - MIDI support! Assign MIDI controllers to all faders. Supports network midi and has a virtual MIDI in. - Audiobus support. Now you can stream live audio directly to other Audiobus-compatible apps! See http://audiob.us for more information. Works as input and filter. - Audiobus state saving support - Inter-App Audio support - Background audio support: enabled when connected to Audiobus and user switchable otherwise. The 'background audio" switch is located in app's "settings" page iPad2/iPhone4S or newer is recommended for complex presets this app is optimized for iPad and iPhone 5 To get started please watch the tutorial videos on the website and read the user guide inside the app
MIDI FX
This app allows you to control and process MIDI signals for music creation. It offers features like harmonization, transposition, and sequencing, enabling you to control external or virtual synthesizers and create complex musical arrangements.
- MIDI signal processing
- Harmonize and Transpose
- Sequencer for synths
- Delay and Looper
- Filter notes by velocity
- Internal instruments
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Buy once and get the iOS and Mac apps (with Family Sharing) Control your MIDI signals and process them in any combination of ways: Harmonize, Transpose, Arpeggiate, etc... Or use the Sequencer to play any external or virtual synth. Use a MIDI interface to unlock the power of the app to control multiple synths with one keyboard, play one note and generate chords, basslines, etc... Use the delay/looper or filter notes based on velocity or other parameters to send to different synths/effects. A MIDI workstation in your pocket (or your iPad/Mac) You can also use some internal instruments (drums sampler, piano or synth) if you are away from your MIDI gear, and sequence whole songs inside the app, or use other synth apps as input/output for MIDI FX. Your imagination is the limit!
Screenshots
Verdict
The clearest difference is price: MIDI FX at Free against rrarrow's $3.99. MIDI FX also leads on rating (5.0 vs 4.6) and update cadence (every 9 days vs every 4 weeks). rrarrow's advantage is in-app purchases (none vs 1) and ratings volume (19 vs 4). On ads, device support and iOS requirement 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
MIDI FX is free to download; rrarrow costs $3.99 up front. MIDI FX sells 1 one-off in-app purchase. rrarrow asks for nothing beyond the download.
MIDI FX holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 19 and 4 respectively.
rrarrow ships an update every 4 weeks, MIDI FX every 9 days. The most recent releases landed on September 24, 2026 and June 4, 2026 respectively.
| Parameter | rrarrow | MIDI FX |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.6 (19 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 81.3% of reviews | — |
| Number of ratings | 19 — better | 4 |
| Update frequency | Every 4 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod, Mac | iPhone, iPad, iPod, Mac |
| Requires iOS | 15.6 | 14.7 — better |
| Further details — not scored | ||
| Size | 29 MB | 263 MB |
| Age rating | 4+ | 4+ |
| Developer | Alexey Nadzharov | Jorge Arroyo |
Customer experience
rrarrow
MIDI FX
In-app purchases
rrarrow
No in-app purchases
MIDI FX
- Unlock app$9.99









