A free program for Android, by Honso.
This is the Tigrinya keyboard plugin. It will allow you to type in Tigrinya and have the words corrected and predictions offered to you. It is designed to work with Multiling O Keyboard. You will also be able to use it with other keyboards that have the Tigrinya keyboard as one of their options.
You will not need to download any other language pack in order to use this application. This is all included in the package. You will also be able to translate the Tigrinya text into your language if you want. You can use this app without having to pay any fees. You can also use it for free.