Apps similar to 4thewords include WritersAlley, which has a free version. Other options are Write or Die, The Most Dangerous Writing App, Authorlytica and Nothing To Say. In total there are six Habit Trackers like 4thewords for the web, Mac, Windows and Linux.
Build a writing habit with smart tracking, progress prediction and daily motivation. Create writing-challenges with your community. WritersAlley is a writing tracker for authors and writers.
Germany
EU
Write or Die is an application for Windows, Mac and Linux which aims to eliminate writer's block by providing consequences for procrastination and rewards for accomplishment.
Write. Don't stop. If you stop typing for more than five minutes, all progress will be lost.
Authorlytica is a writing tracker that turns daily word counts into streaks, beautiful graphs, and deep writer analytics. See what kind of writer you are, cheer on friends, and find the motivation to finish your book.
NetherlandsEU
Nothing To Say is a writing app with a running text line that doesn't let you edit the text as you go
