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.
Robinhood - Free stock trading service.
Habitica - Habitica is a free habit building and productivity application.
Naga - Join our stock & crypto trading social network with over 1 million users. Copy other traders fully automatically with a free account and over 1,000 tradable assets.
HabitBull - HabitBull
GatsbyJS - Blazing-fast static site generator for React
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.