I use this one and I like it a lot! It's a very cute app, and the beginning with the console really sold me on it being legitimate. Well, at least it gave it geek cred points or something.

I did some digging into this one and it seems that the issuance of the token is centralized and the token itself is blockchain based. However it's been awhile, maybe they issued more info. I was not able to figure out any properties of the token... What the consensus mechanism is or how to say run a node yourself (maybe the app itself is doing its part in securing the network, who knows). Would be good to see if I can find it.

I should write my own referral and share too :). Cheers.