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.
WordPress - WordPress is web software you can use to create a beautiful website or blog. We like to say that WordPress is both free and priceless at the same time.
Habitica - Habitica is a free habit building and productivity application.
Gotcha - User-centric analytics & triggers, driven by micro-surveys
HabitBull - HabitBull
Kustomer - Kustomer is the first intelligent CRM for customer experience that enables you to know everything about every customer.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.