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.
PeerSolver - Problem-solution pairs that tell you what works and what doesn't.These are the categories we tackle:* Ideation* Hiring* Leadership* Marketing* Getting investors* Time management* Idea validation* Market needs* Growth Hacking
HabitBull - HabitBull
Great F*cking Startup Advice - Strongly worded suggestions for startup founders
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Startup Fucking Advice - A humor-based website that gives random startup advice.