I guess it's really safe cause it's open source, you can make notes on your habits but don't really do that. Its simple. Really fast. Haven't found a way to connect it to notion. In general it's a great app to track you habits. Does its job. Not more, not less.
Lifetick - Lifetick is an online Goal Setting application with a stylish, easy to use interface.
Habitica - Habitica is a free habit building and productivity application.
Goalscape - Goalscape goal setting software is the best way to define, work on and reach your highest goals.
HabitBull - HabitBull
GoalsOnTrack - GoalsOnTrack is a robust and comprehensive smart goal setting software program that helps you set, track and share goals, manage tasks, track time, build habits, create vision board, keep goal journal, and achieve more success in reaching both perso…
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.