What POS-native buys
Accuracy. The system sees what was ordered and what was paid, so a rule like one stamp per amount spent is enforced automatically. It can also reverse a reward when an order is refunded.
Bioflow records a visit, not a basket. Any spend-based rule depends on staff applying it.
What it costs
Lock-in. Change your point of sale and the loyalty program goes with it — including, in practice, the member history that lived inside it.
Bioflow's program is indifferent to which POS you run, because it does not touch one.