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.
Send Anywhere - Send whatever you want, wherever you want
HabitBull - HabitBull
ShareDrop - HTML5 clone of Apple's AirDrop - easy P2P file transfer powered by WebRTC
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
NitroShare - Official status updates from https://t.co/Uiz47VKYD9. Email updates: https://t.co/zY8kOVT5CN