Why one grid a day?
The daily appointment is the whole charm: you play without burning out, come back the next day and compare results with friends, since everyone gets the same grid. On SIWA your streak of days played builds itself, and leagues let you compete with friends.
Which game for which player?
Deduction lovers start with Tusmo. Fans of clues and definitions will enjoy Prefixo and Motamo, close to crosswords. Synonymo and Proximo work on meaning, Melimelo on anagrams and Relio on speed.
French words, anywhere
All these games use French words and play in the browser, on a phone, tablet or computer: nothing to install. A good way to practise French vocabulary, too.