MidiStep vs OkChorale
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MidiStep
Create complex rhythms and generative music with a powerful step sequencer. Control randomization for notes, chords, velocity, and more to generate unique, ever-changing musical patterns. Automate synth parameters with independent modulation lanes.
- User-controlled randomization for musical parameters
- Polyphonic chord playback per step
- Variable step sequence lengths
- Multiple linked patterns
- 8 independent modulation lanes
- Real-time modification of randomization
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MidiStep is a powerful and inspirational polyphonic step sequencer, and a dream for lovers of complex rhythms and generative music creation tools. The program uses sophisticated, user-controlled randomization to generate notes with a variety of parameters, including note values, note length, chords, patterns, velocity, gate, dividers, repeats, swing, and many more. You have complete control over what, when, and how much is randomized on a step-by-step basis. You can easily create patterns that have little to no variation, patterns that maintain a recognizable pattern but have some degree of variations to the notes, velocity, etc., all the way to patterns with extreme randomness with every pass – the degree of randomization is completely under your control for every parameter and for every step of a pattern. Features include per-step polyphonic chord playback, variable step sequence lengths for all parameters such as pitch, octave, velocity, note duration, beat divisions etc, and the capability to create multiple patterns which can be linked together in various ways. MidiStep also features 8 additional modulation lanes with independent play speeds. These can be used to automate parameters within your favourite synths. MidiStep uses sophisticated randomization settings for note values, note lengths, velocity, gate, dividers, repeats, swing, pitch bend and modulation. In addition, by setting different cycle lengths, step skips, step repeats, jumps, rewinds, cursor positions, pattern jumps, octave shifts, and many other parameters, you can create an infinite number of non-repeating sequences. The degree and types of randomizations for each of these parameters is up to you! Aleatoric music, also known as chance music, allows you to create patterns and entire compositions with user-controlled randomisation. The word 'aleatory' is derived from the Latin word 'alea' meaning dice. MidiStep allows you to turn on/off randomisation on a stepwise basis for almost all parameters, set the percent probability that the randomisation will occur, set min/max values, set exactly which parameters will be randomized, etc. The exact realization of the music will vary with each pass of the sequence, resulting in unique and captivating aleatoric renditions. All randomization controls can be modified in real-time. Features include: •Each of the 16 sequences can have unlimited types and degrees of randomness that you control. •8 independent sequencer lanes: Notes, Chords, Octaves, Velocity, Gate, Divider, Repeat, Delay. •8 independent Modulation sequencer lanes. •16 Patterns and 4 types of pattern switching, independent for each pattern. •Up to 16 steps per pattern, 16 patterns, and 16 cycles per pattern for a maximum sequence length of 4096 notes. •Independent sequencer length (1–16 steps) for each of the 16 lanes. •A Master step cursor independent of all other lanes. •Independent randomization parameters for each of the 16 lanes, with probability, min/max values, default values, skips, repeats, etc. •Unlimited variety of sequences, from slight variation to wildly different sequences on every pass. •126 scales and 126 chords – in every key, along with a scale and chord editor for you to create your own. •Chord complexity for 2–8 note chords, with notes specified or randomly generated. •Chord Articulation options – Block chords, Strum up/down, Arp up/down – with accent, length, speed, and random note order parameters. •Master lane and Chord lane previews. •Pattern Creator - automatic melody, chord, bass and drum backing. •Auto-scroll chord lane. •7-octave range for notes and chords (from C1–C8), with static and random octave offsets. •11 note lengths – from 1/32 note to 4 full measures, plus ties across notes, rests, repeated notes, and delays. •Two types of Swing with adjustable offset. •Humanize settings for note velocity and note timing. •Transposition of sequences using a keyboard – mono for single notes, and poly for chords.
OkChorale
This audio effect plugin offers stereo chorus and vibrato inspired by analog stomp boxes. It allows for modulation of delay times to create classic sound effects, with adjustable rate and depth. It can be used standalone or within compatible music production applications.
- Stereo chorus and vibrato effect
- Analog stomp box inspiration
- Adjustable modulation rate (0.1-10.0 Hz)
- Adjustable modulation depth
- Chorus and Vibrato modes
- AUv3 compatible
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OkChorale Chorus / Vibrato Plugin (AUv3) OkChorale is an audio effect plugin that can run standalone, or in any AU compatible host application such as Logic or GarageBand. Overview OkChorale is a stereo chorus / vibrato effect inspired by classic analog stomp boxes. While not intended to be a model or replica of a specific unit, the processing and features embrace a bygone era of simpler times! Both chorus and vibrato effects are achieved by modulating the time of a delayed version of the dry signal. Typically, these delay times are very short, between 5-20ms. Parameters Active - Toggles the effect On or Off. Rate - Varies the modulation LFO frequency between 0.1-10.0 Hz. Typically, chorus sounds better with slow modulation, and vibrato is more noticeable and natural with higher rates. Depth - Sets the amount of delay modulation, as a percentage of the maximum modulation delay time. Mode - Toggles between Chorus and Vibrato mode. In Vibrato mode, the base delay time is very short and no dry signal is present in the plugin's output. In Chorus mode, the delay time is longer, and the dry signal is mixed with the delayed version. When used in stereo, the left and right channel's modulation is out of phase to create a wide stereo effect. The modulation wave shape is also different, depending on the mode. In Vibrato mode, a sine wave is used. In Chorus mode, a slightly rounded, and more "analog-like" triangle wave is used. Despite the basic design and lack of features, we hope you agree that OkChorale can still sound pretty OK! If the name sounds familiar, OkChorale is a version of the OK CHORALE module developed for Voltage Modular by Waverley Instruments. For more info and support please visit: www.waverley-instruments.com/robjackson
Screenshots
Verdict
The clearest difference is price: OkChorale at $1.99 against MidiStep's $14.99. OkChorale also leads on update cadence (every 3 days vs every 2 weeks) and review sentiment (100% vs 81%). MidiStep's advantage is ratings volume (26 vs 5). On rating, 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
MidiStep costs $14.99 and OkChorale $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
OkChorale holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: MidiStep has 26 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 81% of MidiStep's written reviews are positive against 100% of OkChorale's.
MidiStep ships an update every 2 weeks, OkChorale every 3 days. The most recent releases landed on October 20, 2026 and October 10, 2026 respectively.
| Parameter | MidiStep | OkChorale |
|---|---|---|
| Price | $14.99 | $1.99 — better |
| Rating | 4.8 (26 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 81.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 26 — better | 5 |
| Update frequency | Every 2 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 44 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | 4Pockets.com | Rob Jackson |
Customer experience
MidiStep
OkChorale
In-app purchases
MidiStep
No in-app purchases
OkChorale
No in-app purchases









