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.
Habitica - Habitica is a free habit building and productivity application.
Know Your Alcohol - Demystifying the alcohol industry (from Haus and Good Vodka)
HabitBull - HabitBull
Heap - Analytics for web and iOS. Heap automatically captures every user action in your app and lets you measure it all. Clicks, taps, swipes, form submissions, page views, and more.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Zero Percent - Alcohol tracking chatbot & 100 day no drinking challenge 🏆