Nice iOS mail client app?

crossposted from : https://jlai.lu/post/15113385

Does anyone know a nice iOS mail client app? Preferably open-source.

I don't really care about E2EE, PGP.., and it should have notifications. Best thing would be that I can self-host the notifications server OR have a notifications server running that's open-source (so Canary Mail it out of the question)

I want another client that isn't Apple Mail also

So far I found Preside but sadly it isn't open-source