Sober Time Premium is a subscription that unlocks useful features and unique community cosmetics. To purchase Sober Time Premium, follow these steps:

1. Open the main menu button in the Home page's top-left corner.

2. Tap on Premium.

3. Click the "See all plans" button to choose a premium plan.

4. Tap the "Buy" button at the page's bottom center.

5. Make the purchase using Google Play or the Apple App Store. Tap "Subscribe."