You want your clients coming back so make them want to come back.
A good loyalty system is proactive, working for you with nothing to do.
Matches your business
There are many options for setting up your loyalty, based on points, amount spent, the way your business works best.
While you go about your normal day loyalty points will be earned with nothing you need to do, and you can even then automatically notify clients when they have enough points to redeem a voucher and get free service.