AlphaJax
20 Achievements
200
3-4h
Unburdening Gesture
You placed the seven letters of your rack in a single move.
5
How to unlock the Unburdening Gesture achievement in AlphaJax - Definitive Guide
This will come along naturally if you're playing regularly. However, if you want it quick, I suggest using an anagrammer against your secondary account (it's not fair to do it against random/skill-based players), and use http://margana.ghacademy.org/
Unlike Scrabble-solver or any of the others, you can tailor this to Alphajax specifically, it uses the correct dictionary. Just fill in the board with what your current game is, and the Scrabulizer will actually work out the very best possible words you can play and list them in order of points.
If, at any point, there is a chance to place all seven of your letters on the board, then the Scrabulizer is definitely your best bet
This achievement requires that you play all 7 letters on your rack in a single turn. This achievement would be quite hard for someone not using a solver, so you will probably need to use one. Just keep entering all of your letters to see if you can make a full 7-letter word with them. You should also always add in various letters on the board where you could attach yours to and see if any 8+ letter words exists as well. This requires some luck, but mostly just checking all of your options. While going for this, unload the higher value letters ASAP as they rarely can fit into longer words. You also may get this one when you unlock the "Anodyne Supremacy" achievement depending on the technique you choose.