Subscription is an agreement to pay on a schedule — monthly or yearly — for continued access. Software, a gym membership, a coffee box, a streaming seat. The customer is renting the relationship, not buying one item and leaving.

It is not a loyalty program. Loyalty rewards purchases they already chose to make. A subscription charges until they cancel, whether or not they showed up this week. Sold inside a phone app, that charge is an in-app purchase billed by the app store (on Android, Google Play). On the web, it is still just the subscription. SaaS is usually sold this way. A shop can sell one too. Churn is the cancellation. Customer lifetime value is how long they stay, set against customer acquisition cost. Shopify and other e-commerce stacks can bill the repeat for you. Track it in the CRM so a failed card is a save attempt, not a surprise.

A real-life example of a subscription

An Atlanta gym charges a monthly membership and a separate drop-in price for visitors. Members who stop scanning in are churn, not a quiet month. A text before the card fails — “Your payment did not go through” — protects more revenue than another new-member ad. The drop-in is a one-time conversion. The membership is the subscription.

Make canceling as clear as joining, then measure who stays. See app monetization and customer retention.