Free trial length calculatorby PaywallLab

Plan

App Store or Play fee

Trial lengths

Up to 3 lengths. Leave a row empty to compare two.

The 7-day trial earns the most per paywall view

Over 24 months it earns 14.3% more than the 3-day trial and 15.1% more than the 14-day trial. The 3-day trial would need 35.0% of trials to convert to match it; you entered 30.0%.

3-day trial
$1,428per 1,000 views, 24 months
7-day trial
$1,666per 1,000 views, 24 months
14-day trial
$1,413per 1,000 views, 24 months
Show details

Per 1,000 paywall views over 24 months

Views that payPayments eachPer 1,000 viewsvs bestTrial to paid to match
3-day trial3.00%1.40$1,428-14.3%35.0%
7-day trial3.50%1.40$1,666bestbest
14-day trial2.97%1.40$1,413-15.1%38.9%

When the money arrives

The 3-day trial pays first on day 3 and fits 2 payments; the 7-day trial pays first on day 7 and fits 2 payments; the 14-day trial pays first on day 14 and fits 2 payments in the time frame. Payments each is the expected number per paying subscriber after renewals. Revenue is after the store fee.

Testing it

A test with all 3 trial lengths as variants needs about 26,334 paywall views per variant, about 80 days at 1,200 views a day including the longest trial ending to tell 3.50% paying from 3.00%, at 95% confidence split over the 3 pairs of options and 80% power. Close options take a long time to separate; if the test is too long for your traffic, drop the option you believe in least.

Assumes one price and one renewal rate for every trial length, and that converters pay when the trial ends. Refunds are left out. Trial length can also change who renews; if you have data on that, run each length through the LTV calculator. How this works