You don’t always have to approach your customers with NPS on a scheduled basis or tied to some sort of event. Get feedback on the strength of working relationships with your customers.
https://marketplace.mopinion.com/survey-templates/cx-relationship-nps-net-promoter-score/
Traditional smiley faces have been around for years now as a popular feedback metric. So why stop now? Try using these on your homepage forms to gauge the level of loyalty customers have towards your service or product.
https://marketplace.mopinion.com/survey-templates/smiley-face-score-loyalty/