If you are using #riot-android you should update to version 0.8.28a as this is a critical security update.
If you are a user of the matrix.org homeserver and have received an alert message stating that you should update to a version 0.8.99 from google play you can safely ignore that. This message was only targeted at google play users but accidentally sent to some #F-Droid users as well.
If you are an app developer consider adding good descriptions, screenshots and a "Whats's New" section for your app.
If you notice that your favourite app doesn't fulfill all these requirements consider notifying the app's developers or just help them with a merge request adding the missing info to the source repo.
RT @AwesomePaaS@twitter.com: @jcarnus1@twitter.com Hello @jcarnus1@twitter.com. For the synchronization part, we recommend @davdroidapp@twitter.com. If you need a calendar and a contact app, you can pick great applications from: http://simplemobiletools.github.io. All the aforementioned apps are available on @fdroidorg@twitter.com, the best app market on Android :)