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.
Go Fucking Work - Website blocker so you can get back to your fucking work
Habitica - Habitica is a free habit building and productivity application.
Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Covid-19 Controls - Lockdown measures and tourists restrictions around the world
HabitBull - HabitBull