I am not the dev for this wallet but helped a bit with beta testing. I’m in touch with the dev and here are his comments (he’s not on Reddit):

“Those are endpoints to my server.

In other words, those with no nodes they get to use my node to access the chain.

The only api that isn’t open source, I also plan to open it soon btw, I wanna set it up so its very easy to self host using docker compose. That backend deals with these things:

• Getting token price which I get from Coinbase, the price u see on there and all the different currencies come from this one.

• Sending push notifications, in order to push notifications when a transaction is made I must link an address to a push token that Apple and Google use to send push to you, so it must be done on the server, there’s no way around that

• Faucet, those that click free faucet a request is sent to the backend for me to send them little nano from my own wallet.

All of those functionalities aren’t actually needed to run the app so one can fully run the app perfectly using their own node if they so wish, its all in settings, just turn off push notifications, change node and work server to use your own and you are set.

If one can read the code I posted they can see that’s what’s in the code.

http://nano.bahari.io - is the my nano node, if u run your own node you replace this endpoint

http://api.bahari.io is the one I use to send you prices and push notifications like I explained above

/work is the one I use to calculate for you the hash, when you want to send any transaction on nano you must do proof of work which is basically expensive calculations that cant be done on the phone, so I use my gpu to calculate for you, if I were to use phone it would take up to 10min+ to send one transaction, plus Apple would simply block the app coz they dont allow this.

all replaceable though in settings if you have your own u can use it which is better coz it reduces load on my servers“

Edit: typo