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.
Based on our record, Polymail seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Polymail - This one is a lot like Twobird but with a lot more features. It's a different type of email client. It's really cool, but the Windows version is just a web app. It's available on iOS as well. Source: over 2 years ago
Habitica - Habitica is a free habit building and productivity application.
Airmail - Airmail is a lightweight and lightning fast mail client for Mac.
HabitBull - HabitBull
Spark Mail - Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!