For developers, it could be a good source of extra income. That said, some developers have reported huge download numbers off the back of the free app of the day promotion, but no resulting increase in sales once the promotion is over. You are also likely to do better with tablet optimized apps than smartphone apps in general, as Kindle users are the primary customers.
Resilio Sync is a cloud storage solution for people who don’t trust cloud storage. It creates a cloud storage server on your personal computer. The app lets you sync your files, photos, videos, audio, etc from your computer to your phone and back again. Thus, you get the cloud storage experience without having to trust your data to a third party. The desktop and mobile apps are easy enough to setup and the UI is functional. There is a pro version with some extra features, but the free version does the basics just fine. New Droid Apps
Initially, we weren’t going to put any launchers on this list. Nova Launcher seems to be extend beyond what normal launchers are. It’s been around for years, it’s been consistently updated, and thus it’s never not been a great option for a launcher replacement. It comes with a host of features, including the ability to backup and restore your home screen set ups, icon theming for all of your Android apps, tons of customization elements for the home screen and app drawer, and more. You can even make it look like the Pixel Launcher if you want to. If you go premium, you can tack on gesture controls, unread count badges for apps, and icon swipe actions. Those looking for something simpler may want to try Lawnchair Launcher, Hyperion Launcher, and Rootless Launcher as well. Droid App