Free download Simpletask Dropbox APK for Android, PC. Latest version is 10.1.15, update at March 28, 2020
Simpletask Dropbox version 10.1.15 is only one variant.
A simple task list manager that strives to have just enough features to do GTD, but no more. Based on the todo.txt app so a todo.txt file (http://todotxt.com) is used...