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.
Workfrom - Best coffee shops and cafés for working
Habitica - Habitica is a free habit building and productivity application.
Workmode - Find the best places to work remotely from, near you
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Café Wifi - Find a space with some coffee and connectivity to get your work done.
HabitBull - HabitBull