Android/iOS app

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Not sure how to do it, but hopefully someone does.

[njhuffman]

Briefly looked at fyne.io, might be an option. It's a toolset that can compile go apps for "any" platform - android, iOS, os x, windows, Linux. The catch seems to be that you have to use their gui tools which they have built support for on each platform.

[HACKERALERT]

Could work, I looked into it in the past. Notably, no drag and drop files support and the file picker on mobile devices looks kinda weird. But overall it should be a functional choice. Also, gioui may work, but it is really difficult to use

[ZingyAwesome]

The Picocrypt CLI runs well on Android using Termux. Although it's not the real deal, I'm using it as a recovery solution: in the event that I lose access to my desktop devices, I can still decrypt my disaster recovery files on a phone/tablet using the CLI (e.g. password manager backups). Paranoid mode and reed-solomon work fine too.
I used my Linux arm64 build of the CLI from here.

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I'll add official builds for the CLI shortly.

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Added.

[ZingyAwesome]

Thanks Evan :)