What are some alternatives?
When comparing Tweek.so and Google Calendar, you can also consider the following products
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Teuxdeux - TeuxDeux / What deux yeux have teux deux teuxday?
Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...