Comparison

modstep vs Collider

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

Head to head
About

modstep

Create music with a powerful MIDI sequencer for iPad. Control external hardware, IAA apps, and Audio Units. Features unlimited tracks, real-time editing, and integrated synths/samplers for on-the-go or studio production.

Highlights
  • Session-style MIDI sequencer
  • Unlimited tracks and scenes
  • Real-time editing and modulation
  • Integrated synth and sampler
  • IAA and Audio Unit integration
  • Ableton Link sync
  • MIDI and Audio export
Features
Read full description

Modstep Introducing Modstep, Modulation Monster and the first full-blown MIDI sequencer for the iPad. Modstep allows you to create music and jam with your iPad and your favorite IAA Apps, Audio Units, Mac and PC software and MIDI hardware as well as the internal drum sampler and synth. Use it as the centerpiece of your setup to create and perform music on the go, in the studio and on stage. "If you´re looking for a versatile, adaptable MIDI sequencer for iOS, Modstep comes highly recommended" Sound On Sound “Modstep could change how an iPad fits into your music making” CDM “If you’ve ever dreamed of a touchscreen brain for your studio, this is it.” FACTMag "Modstep is a great step forward for step sequencing.” Audionewsroom FEATURES: -Session-style MIDI sequencer with unlimited tracks & scenes. -Play individual clips or whole scenes, or use the included arrangement features to manage more sophisticated song-structures. -Clips are pattern based which allows quick edits on the fly. Set a variable speed per pattern. -Edit clips with either the Step Sequencer or the Piano Roll -Step Sequencer with active steps and step-shifting. -Piano Roll with variable quantization including triplets, access to modulations, velocities and scales. -Everything can be edited, arranged, modulated or changed in real-time. -Note Repeat from 1-48th to 1/4th. -Global Swing -Unlimited MIDI & Audio tracks - only restricted by the power of your iPad. -Tempo range from 20 to 999bpm. -Sync via Ableton Link. -Stable and low-latency MIDI Clock In & Out with latency adjustment. -Trigger out -integrated global keyboard with scales & drum-pads allow quick recording of individual tracks with a single surface. -Use an external controller or keyboard to control, record or play any given track. -Midi mappable via external MIDI controllers -Internal additive synth with up to 64 harmonics per voice, 3-band eq, delay, reverb, lfo and detune. -Internal sampler with pitch, volume, reverse, fx per slot, 3 band-eq, delay and reverb. -Integrate any IAA compatible app or Audio Unit as an instrument or effect. -unlimited number of effects per track. -Audiobus support. -convenient plugin management via drag and drop. -Integrated mixer with Arm, Mute, Solo per track -Any loaded instrument or external MIDI hardware is completely modulatable via CCs. -Up to 128 CC modulations per track. -Audio and MIDI streaming directly via charger cable to Mac and PC using studiomux technology -Export sample perfect loops of audio per track. Choose which channels to record. The internal quantization will make sure they are sample-perfect and ready for any DAW. -Import / Export of MIDI files. -Import / Export of Audio & MIDI files via AudioShare. -A sophisticated template system allows quick setup of tracks to control external MIDI hardware, apps or plugins. -Includes many preconfigured templates for popular external hardware. -Template editor to create your own templates for IAA Apps, desktop Apps and external MIDI devices -Supports all MIDI interfaces for the iPad -Works on all iPads (iPad 1 restricted to MIDI only) Requirements: iOS 8 or later for audio and MIDI streaming to a Mac or PC, the studiomux server software is required: get the latest for free at studiomux.net Manual: You can find the manual here: http://www.modstep.net/manual

About

Collider

Enhance your Elektron Analog Rytm drum machine with this performance and control surface app. It offers extensive randomization, parameter control across all tracks, and creative pattern generation tools to unlock new sonic possibilities.

Highlights
  • Randomized Kits and sound design
  • Parameter randomization and morphing
  • Cross-track parameter control
  • Scene and performance randomization
  • Euclidean and algorithmic pattern generation
  • Save and load kits, tracks, and patterns
  • XY pads for FX and filter control
Read full description

Collider is a performance and control surface for Elektron's Analog Rytm drum machine. Unlock the full potential of your drum machine with minimal effort and programming! Features: - Randomized Kits of a certain flavor + sound design functions - Intelligently randomize and morph Parameters, Pages, Tracks, FX, Patterns, Trigs & Parameter Locks - Control common parameters across ALL Tracks - Scenes and Performance Randomization - Pattern Mode: Euclidean patterns, humanization, randomization, pattern algorithms and much more! - Over 300 drum grooves from various genres are included to kickstart your production - Automate the addition of TRC conditions and P-Locks, Randomize Retrig Rates and Sequence Lengths creating interesting and evolving patterns - Save and Load Kits, Tracks, MFX, Mixer Settings, Kit Snapshots & Pattern Snapshots - Mixer Mode - Chromatic Mode - XY Pads to control Master Filter, FX, Drive - Link multiple tracks to single pads for layering * Compatible with both MK1 and MK2, requires RYTM OS 1.60 or higher * Not compatible with Overbridge

Verdict

The call

The clearest difference is review sentiment: Collider at 92% against modstep's 46%. Collider also leads on rating (5.0 vs 2.8). modstep's advantage is price ($9.99 vs $19.99) and ratings volume (39 vs 13). On update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

modstep costs $9.99 and Collider $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Collider holds the better App Store score, 5.0 against 2.8. Both are backed by a comparable volume of ratings — 39 and 13 respectively. Written reviews point the same way: 46% of modstep's written reviews are positive against 92% of Collider's.

UpkeepUpdate frequency

modstep ships an update every 3 weeks, Collider monthly. The most recent releases landed on June 10, 2026 and June 11, 2026 respectively.

Scorecard5 real differences · 5 level
modstep versus Collider: the parameters behind the verdict, then further details
ParametermodstepCollider
Price$9.99 — better$19.99
Rating2.8 (39 ratings)5.0 (13 ratings) — better
Positive reviews45.8% of reviews91.7% of reviews — better
Number of ratings39 — better13
Update frequencyEvery 3 weeks — betterMonthly
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPad
Requires iOS7.0 — better12.0
Further details — not scored
Size99 MB27 MB
Age rating4+4+
DeveloperChristian BlomertMarcos Kohler

Customer experience

modstep

All ratings39 ratings
Positive41.0%
Neutral5.1%
Negative53.8%
Written reviews155 reviews
Positive45.8%
Neutral14.2%
Negative40.0%

Collider

All ratings13 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews12 reviews
Positive91.7%
Neutral0.0%
Negative8.3%

Bugs and requests

modstep

Reported bugs

18 issues
  • App crashes when loading external IAA/AU instruments
  • Constant clicking sound with metronome off
  • Projects fail to load or require multiple restart attempts
  • MIDI input routing ignores channel settings
  • Track names change when using 'save as' function
Show 13 more
  • App crashes when adding second synth to project
  • Black screen on startup
  • Crashes when editing notes in pattern editor
  • MIDI note hanging and stuck notes
  • Random crashes during playback or editing
  • Instruments deleted after app crash
  • Inter-app audio broken on newer iOS versions
  • App crashes when deleting tracks
  • Editing while playing causes crashes
  • Clip deletion causes crashes
  • IAA apps lock in slots
  • Screen goes blank during operation
  • Skipped notes and misfired triggers

Requested features

18 requests
  • Undo/redo functionality
  • MIDI import capability
  • Pre-roll for recording
  • Dedicated mixer with send/returns
  • Audio loop recording and playback
Show 13 more
  • State saving for synth presets
  • Bank MSB/LSB support for program changes
  • Precise CC automation entry
  • Song mode for arrangement
  • MIDI CC scene launching
  • Metronome volume and pan control
  • Note selection tool in piano roll
  • Groove templates
  • Better transposition tools
  • Pan control for instruments
  • Reset function for faders and values
  • AU MIDI plugin support
  • Sample upload over IP

Collider

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

modstep

No in-app purchases

None

Collider

No in-app purchases

Questions

Is modstep free?
modstep costs $9.99, with no in-app purchases.
Is Collider free?
Collider costs $19.99, with no in-app purchases.
Which has better reviews, modstep or Collider?
Collider is rated higher. modstep averages 2.8 out of 5 from 39 ratings, while Collider averages 5.0 from 13 ratings.
Do modstep or Collider have ads?
Neither modstep nor Collider shows ads.
Which is updated more often, modstep or Collider?
modstep ships an update every 3 weeks, and Collider monthly. Most recently, modstep was updated on June 10, 2026 and Collider on June 11, 2026.

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