Textra is an excellent alternative to Messages on Android. The app includes tons of visual customization options that you won't find with the stock messaging app, including custom contact colors, text bubble styles, and notification icons. Additionally, you get extra features such as text scheduling, the ability to blacklist contacts, and the option to rename group conversations. Textra also has excellent light and dark modes.
Remember Flickr? The venerable photo-sharing service is an Editors' Choice web service, and the Android app has a lot to recommend it, too. It's more about the art of photography than the meme- and selfie-packed Instagram. Offering a well-designed interface and excellent photo and video editing tools, Flickr is more valuable than ever. Plus, the app connects you to the vibrant community of photographers on the service. Best of all, it can automatically back up photos from your phone. Free users can upload up to 1,000 photos and a $50 per year subscription gets you unlimited online photo storage. Android App
File browsing is something everyone inevitably has (or wants) to do, so you might as well do it with a capable, fantastic file browser. Solid Explorer is pretty much as good as it gets in the file explorer apps realm. It features Material Design, archiving support, support for the most popular cloud services, and even some more power user stuff like FTP, SFPT, WebDav, and SMB/CIFS support. It looks great, it’s incredibly stable, and it just works well. There is a 14-day free trial with a $2.99 price tag at the end of it. This is, by far, the best file manager on Android for most people. Droid App