Mar 7, 2026 1 min read by Philip

Supernote manta - geometric shapes and more

JavaScript

The supernote manta lacks shape conversion, so I built an app for it.

I love the supernote manta... But!

Okay, so I bought the supernote manta to help organise my thoughts. These are great for fast paced work like at a startup, because you'll sometimes have an idea that enters your head, and you'll want to have it written somewhere.

As part of my job, I like to write down logical flows, and use flowcharts. Converting shapes is really useful for flowcharts and work like this in general. But unfortunately, the supernote lacks this by default. The remarkable has this so why not the supernote?!

GoSN Supernote Manta App

After googling a bit, it's quite clear the community would be interested in being able to convert shapes... So my imperfect answer to it was to reverse engineer the files. They're vector based, which is great. Interestingly, I had been reading a bit about how AI works (lots of vectors), and so I applied some of this knowledge; using cosine similarity I was able to convert the shapes. Now I understand them (they're quite simple actually), I might try to make some more stuff for it. Perhaps AI based handwriting recognition? Who knows.

Supernote manta

This isn't a perfect solution because I'd like to be able to convert shapes on the device itself. I read that there will be an improvement to the software, allowing devs to implement plugins more easily. So when that happens, I can potentially make a plugin for it. But supernote, please implement shape conversion! You will find it easier than me, as I had to reverse engineer the files.

This app is also a minimal product for me to try out. But if you'd like to see something more feature complete, what are the features you'd like to see?

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