You can start a subscription at any time during or after your 14-day trial.
There are two places in the app where you can start a subscription.
In the banner on the main page, click on Click here to start a subscription.
Under Settings on the Account tab, click Subscribe in the Subscription status section.
Available plans will be displayed. Select a plan, enter a referral code if you have one, and click Apply (this is optional). Click Subscribe Now!
The payment page is presented. Provide your payment information, then click Subscribe at the bottom of the page.