BlueWallet's chief technology officer reviewed 904 iOS apps labeled as non-custodial crypto wallets (where users control their keys) and analyzed 494 of them. The assessment marked 45 apps as potentially carrying serious or high security risks: 23 were classified as potential serious risks and 22 as high risks. Reported issues included alleged uploads of seed phrases (backup words for wallet access) or private keys to servers, inadequate wallet randomness, server-side key storage, hardcoded encryption keys and unsigned JavaScript code that could interact with sensitive wallet data. The CTO cautioned that the findings may include false positives and that apps absent from the list are not necessarily safe.