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.
Bring - Clever shopping - simple and shared
HabitBull - HabitBull
Yummly - Yummly is a recipe app. You search through lots of recipes, add the ones you like, and even create shopping lists based on the recipes you pick. You can save your recipes with one click and later organize them into collections.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
KitchenOwl - KitchenOwl is an application that makes grocery lists and recipe management easy.