Anyone’s got any experience with [AirGap wallet](https://airgap.it/)? Any known code reviews/audits?
It is an air-gapped cold-hot wallet pair using two phones (QR codes + cameras). The design is unique as far as I know. Theoretically, it should provide (near?) hardware wallet level of security, and may be more convenient. And everyone’s got a retired phone these days. It may be a poor man’s choice of hardware wallet.
The only downside so far is it comes with altcoins stuff.