Hey everyone, I’ve been building an iPhone/iPad/MacOS app for the EP series called PunchKit and figured this might be a good place to share it.
Here’s a (not so quick 
) walkthrough of the recent v1.6: https://youtu.be/XOTinMGxuXI?si=T0-YVheIF2MNg-EA
The basic idea is to keep the hardware workflow, but make some of the boring or fragile parts easier.
You can connect your EP to an iPhone/iPad/MacOS and:
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Record USB audio takes directly from the device
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Play, scrub, loop, trim, export, and share recordings
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Use “Punch It” to perform and bake live effects into a take (recording)
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Apply filters, distortion, lo-fi, space, motion, and other effects
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Send processed audio back to pads or the sample library
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Split recordings into stems and mix/export the results
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Browse projects, pads, and samples on the device
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Back up individual banks, projects, or the whole device, including sounds
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Restore backups when moving between projects or sessions
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…and more
It’s not trying to replace the KO II. It’s more of a companion for capturing ideas, resampling quickly, experimenting with effects, and keeping a safer archive of your projects instead of having everything live only on the device.
Some of the recorder and effects features also work with the OP-1 and other USB Class Compliant audio devices, so you can try that part even without an EP connected.
Website: https://punchkit.dev/
Would love to hear feedback from other EP users, especially around the take workflow, Punch It effects, stem separation, backups, and anything else you’d want from a phone-based companion app.
Cheers and have a nice weekend! 
Kristaps
p.s. currently not coming to Android anytime soon. I’ve been investing time on the port, but it’s not as straightforward as one might think, so I cannot offer any timelines at this point.