Widget
The widget can be seen below:

The widget is designed for busy people who want to see tasks at a glance and who rarely but consistently update their to-do list. Here's the list of the buttons and what they do:
Upper buttons:
- > Turn on/off the automatic cycling through tasks and tags every 5 seconds;
- > Go to the next tag;
Lower buttons:
- v Check the current task;
- + Add a task in the current tag;
- > Go to the next task in the current tag