Where LoyaltyCardTools is ahead
Wallet passes. A card that sits next to the customer's payment cards and can push a notification reaches people a browser page cannot.
Bioflow does not issue wallet passes today, and if lock-screen reminders are central to your program that should decide it.
Where Bioflow is different
The link page. The same URL in your Instagram bio holds your menu, booking link and the loyalty enrolment QR, so joining happens where customers already are.
On the stamp-card mechanics themselves, these products are close.