That sounds like Pwnagotchi to me, but interested to see what it is if it's another project.

I got a Pineapple but it's overpriced for what it is - there's scripts on GitHub that automate building the Pineapple firmware on much cheaper consumer routers that use the same SoC. It's just a bunch of open source tools with a friendly UX on top of OpenWrt after all.

That said, I can personally attest to the Pineapple's ability to fit in a small bag and be controlled from a smartphone while it's powered by a regular power pack used to change phones etc and it does have impressive range.