Good start!
I realize the dev may not be involved much now with this app, as the Reddit post was from two e yards ago, BUT, if you're reading this, please make a way to have th e dictionary be the NWL23 and the CSW22. These are the two main dictionaries that scrabble players use around the world.
I won't be using this app for now, since a lot of the words I entered, that I know are ok with the NWL23, were marked wrong. But I'd love to come back to this for practice if the an update.