The percentage of people who start free access and later complete the first paid subscription renewal.
Trial conversion rate measures how many trial starters become paying subscribers. A common formula is the number of trials that produced a successful first charge divided by the number of eligible trials that reached their scheduled conversion point, multiplied by 100. The cohort and observation window must be explicit. Dividing today’s payments by today’s starts mixes people at different lifecycle stages and can make a growing product look artificially weak.
A customer who starts a seven-day trial on June 25 cannot be judged on June 30. Cohort reporting waits until that trial has had time to convert, fail billing, cancel, or remain unresolved in grace. Analysts also decide whether recovered first payments count, how refunds affect the numerator, and whether duplicate store accounts map to one user. Store-signed transactions and lifecycle notifications are better evidence than a client event that merely says the checkout screen closed.
Suppose 1,000 eligible trials reach their first billing date. Six hundred renew successfully, 100 are still in payment recovery, and 300 cancel or expire. A strict immediate conversion rate is 60 percent. A mature recovered rate may increase after the retry window. Reporting both prevents billing failures from being confused with deliberate cancellation. Segmenting by platform, offer duration, country, acquisition source, product, and app version can reveal whether the change came from audience quality, pricing, onboarding, or store behavior.
Conversion alone does not prove an experiment improved the business. A shorter trial might raise the percentage but reduce starts; a generous introduction might produce many first charges followed by fast churn. Pair the metric with trial-start volume, retained renewals, refund rate, ARPPU, support contacts, and lifetime value. The paywall must still disclose the post-trial price and renewal cadence clearly. Optimize the customer’s informed experience, not accidental billing.
The store-managed phase that supplies the denominator’s trial starts.
The successful first paid event that normally defines conversion.
A companion metric describing revenue among customers who paid.