Well, I'd never heard of this programming language - and I'll bet you haven't either. Which is understandable, since it's a) quite old, and b) more of a thought experiment than a practical tool. But regardless, there's a programming IDE that works on Windows 10 Mobile - comments welcome!

From the Store description:

Brainf*ck# is the world's most advanced console/IDE and debugger for the Brainf*ck programming language, exclusively on Windows 10.

With a fully featured IDE that supports breakpoints, syntax highlight, autocompletion and more, an interactive console and lots of other features, this app offers the most complete programming experience in Brainf*ck on any platform.

If you are a developer who knows how to write in C and you want to try something different, if you're just curious about this language, or if you've heard about it and you want to use it to create something crazy, this app offers everything you need to get you started. 

You can find out more about the Brainf*ck# language here.

Here's Brainf*ck# UWP (and the language itself) in action, via the promo graphics:

A full IDE for programmers - and only eight possible commands/operators! Wow. Not that you're going to write a word processor in this, mind you...!

If you look at the strings of operators and buffer readouts and your eyes glaze over, then Brainf*ck# isn't for you!

There's a lot to the IDE though, on which lots of care has been lavished, it seems, including this dark theme and blur effects!

Oddball or what?(!) You can grab this in the Store here.