You can now upgrade and renew your Premium via the LastPass app itself, charged to your Google Play account:
Getting Started Wizard
New users of the Premium app will have more step-by-step help in learning how to use the app's features:
Note that with the in-app purchasing of Premium, autorenewal is not available, only a 1-year payment option at this time. We do plan to offer the ability to purchase subscriptions in a later update.
These usability improvements follow several other major additions to our Android app in the last few months alone, including the addition of biometric support for Samsung Galaxy S5 and automated app filling to streamline logging in to other apps on your Android device. We continue to work to improve the mobile experience, with the latest technology available.
The LastPass Android app is part of our Premium service for $12 per year, and the latest update is already available on the Google Play app store.