What's wrong with Ownr? Exodus is closed source too. If a wallet is non-custodial, it's reliable enough.
I wouldn't recommend exodus to anyone. Exodus has its own vulnerabilities (or rather: a weak security concept overall).
Just because a wallet is non-custodial, it doesn't mean it is reliable or secure.
You can never be sure whether the software you are using is secure or even malicious. Nothing keeps the developer to give you a mnemonic from a pre-defined list or just using a weak RNG (either by accident or maliciously).
Using closed-source software to store a form of digital decentralized and uncensorable money is a contradiction in itself.