Keyboard Futo レビュー 

This highly functional and private keyboard is a great alternative to Gboard and SwiftKey. It has important features, including swipe typing, one handed mode, resizing, and an action key, making this keyboard comfortable to use. It has many appealing themes, as well as a theme maker, and many features can be configured, like the number row, voice typing, multilingual support, and sound and vibration. The app is completely free with optional payment, with no ads and account required, and with no lag as the keyboard does not connect to the internet. Best feature is being able to long press C and V keys to quickly copy and paste, similar to how one would on a computer. Highly recommend.