Open Source BRD alternative needed (iOS Crypto Wallet)

As the crypto currency app BRD was bought by Coinbase, the app itself will be gone this year.
At least this is my understanding from: A Cryptocurrency Wallet | BRD

Does anyone have a hint to a good multi-currency open source wallet?
I do not want to use the Coinbase Wallet App, it is even from a company called Toshi instead of Coinbase… Somehow less trustworthy.