[jl2718]

People respond well to financial transparency. If you have a donation button, show real-time stats on the amount it costs, and the amount that’s been donated.

Also because internet, expect 90% of cost to be from abuse, and likewise 90% of your dev time devoted to fighting it.

[Onewildgamer]

I second this, since it is an app an online payment makes most sense. A simple donation button with paypal/venmo (or something the locals use) would make reasonable money to cover monthly infra expenses at least.