Yes. You can charge without a charge card in several ways:
Via the STROOHM App: choose the charge point on the Map, tap Go to payment, choose which wallet or payment method you want to use and swipe the Slide to start slider to the right. You can also stop the charging session in the app.
Via a STROOHM QR or NFC sticker: scan the QR code with your phone's camera or tap your phone on the NFC sticker. Enter your email address and pay with a payment method on your device or with a bank card. This is only possible if the charge point has such a sticker.
With a card terminal: some public charge points have a payment terminal where you pay with your debit or credit card.
Tip: on the Map, use the Start method filter to find charge points you can start via the app or with a card terminal.