Bittr is compatible with most bitcoin wallets. If you don't have a bitcoin wallet, you may find what bitcoin wallet suits your needs best on the official bitcoin website or check out our blog post as a quick start. Keep in mind that you will have to be able to sign a message with your wallet. We recommend to use a hardware wallet, in order to safely store your satoshis for the long-term. Wallets including this functionality are Trezor, Ledger (via Electrum), BitBox and Coldcard. Through the links you can find a guide of the signing process.