What happens after the trial expires?

Please note that after the trial period is over, you are free to continue using the app. The main limitation is that the sleep tracking functionality will be disabled for sleeps starting on Mon, Wed, Fri and Sat.
Also after the trial you may be seeing advertisements in the app.

But you can still track the other days and use all the alarm related features such as CAPTCHA, Bedtime, Lullabies, etc. every day. The non-tracking features are not time-limited in the free version.

If you purchase the full version you will get all your data even form those days, when the tracking was restricted in the free app.

Details about the purchasing plans are available in the full article or at support@urbandroid.org.