Lingrove, a unique word puzzle game, is your free app of the day from the Amazon Appstore for Android.
Simple in design, though not without a challenge. If your guessing skills are up to the task, then this is your game. You get five chances to guess all the letters of an unknown five-letter word. If the letter is correct and in the right spot, then it will be surrounded by a square and automatically carried down to the next line. If the letter is correct and not in the right spot, then it will be surrounded by a circle and you must find the correct placement of that letter.
The Secrets button at the top of the screen takes you to a sort of Lingrove tree with a broken heart in the middle. Haven't gotten far enough to know what this is all about, but the instructions say "Unlock a secret fruit for every 15XP". You will earn XP for guessing the five-letter word correctly. Keep guessing correctly and earning XP to unlock all the hidden fruit on the Secrets screen to check this game off your bucket list.