Already have a great set of IOS Synth apps but want to get some unique sounds & rhythms from them?

MidiSequencer is a step sequencer designed to let you play with melodic tunes on the fly to create exotic sounds from your favourite IOS and hardware synths.

** Reworked as Universal device (iPhone 4s,5,6,6+ and all iPads) **

Comprehensive manual available for view

With step sequencing, up to 16 midi notes can be defined and played back interactively using buttons, sliders and swipes. It therefore lends itself to more experimental style of music making as steps can have all manner of variations - pitch, velocity, length, midi channel, swing, % probability(note or velocity) and musical ornaments such as ratchetting and mordents.

With the addition of chords, each step can also send out up to 128 note chords. You can create your own chords by using a on-screen keyboard or pick common ones such as the dim7.

Midi FX are now included included echo, filters, layering and note rotation....

MidiSequencer also offers extreme tempos (from 1 to 1020BPM) and a variety of Master/Slave combinations utilising midi clocks.

1) iOS 8 or greater only so iPad 1 not suported
2) Iphone 4 upwards only
3) This app makes no sound (although it can send/receive midi to coreMidi apps you have installed on your iPad).
4) To communicate with external midi equipment you will need a suitable iPad midi interface unless you use the Midi Network sessions over wifi.
5) 64 bit compliant

What's New

Version 1.14

Fixed IPad Pro 12.9 FX buttons not working
Fixed 14bit NRPN & RPN not sending 2nd byte if 0 value
Made both IAP (FX & Chords) free

Ratings and Reviews

Inspiring and well thought out

David Wilson-Okamura

This app gets better and better. Its design is shaped by real musical experience, and it's quickly evolving into one of the best sequencers on the iOS platform. It's far more powerful and easier to use than the hardware sequencers used by Tangerine Dream in the 1970s and 80s. Compared with modern, software-based sequencers, it's slightly less powerful than Thesys, but also MUCH easier to get started and play with. As it says in the description, it doesn't make any sound by itself, but it will breathe new life into the instruments you already have, both hardware and on your iPad.

About the in-app purchases (IAPs): the developer, Anthony Saunders, is NOT trying to nickel and dime his customers. If you're interested in the extra functions, they are worth more than what he's charging. But the basic app is robust, functional, and inspiring.

About the four stars: I'm pleased with this app -- that's why I'm taking the time to write a review -- but if you give everything five stars, you have nothing left for the very best. (I see the same problem after musical and theatrical performances, when everything gets a standing ovation.)

Awesome sequencer! Needs UI makeover.


Maybe if I were on something bigger than an iPad Mini I would find this sequencer easy to use. It certainly has enough features to keep a music geek busy for a very long time. But the interface looks to be made for a very large desktop computer monitor: shadows and highlights on tiny buttons and even a script font for some of the function labels. Clearly someone labored painstakingly over these details.

Unfortunately, I cannot use it without constant zooming and scrolling and zooming and scrolling, which completely kills the creative flow for me. There is a lot packed into the screen; the UI really needs to be redone in a more minimal style to make it work as a mobile app. I'm not at all a fan of extreme minimalism as a UI style--please keep the colors! Please don't give me orange or light gray on white!--but add a leavening of flatness and sans-serif fonts and I'll put that fifth star up.

Amazing. A must own.


There's almost too much awesome in this app. It's very easy to just noodle for ever. Though k think that was one of the intentions.

The chord IAP is definitely worth it. Particularly with the brilliant Strum effects (set a chord and then set how it will be drawn out over time. Can do a quick 'strum' as the name would imply but can also spread the notes out for over a measure depending on the interval you set.

I find the effects setup sort of confusing but otherwise most everything is pretty straight forward; which is amazing considering just how much sequencer is packed into this app.


anthony saunders
31.7 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Simplified Chinese
Age Rating
Rated 4+
© 2017 tony saunders
In-App Purchases
  1. Step chords and added notes Free
  2. midi effects Free


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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