The crypto exchange giant Kraken released a self-custodial mobile wallet called Kraken Wallet, and it even published the app's code at launch. Kraken Wallet lets users manage their NFTs, tokens and DeFi positions across Bitcoin (CRYPTO: BTC), Ethereum (CRYPTO: ETH), Solana (CRYPTO: SOL), Optimism (CRYPTO: OP), Base, Arbitrum (CRYPTO: ARB), Polygon and Dogecoin, according to a release from Kraken. Users can also connect to popular decentralized applications and access round-the-clock customer service support.