Widgets and controls
Every widget and control is free. A tick from any of them is the reminder being completed in Apple Reminders, the same as a tick in the app.
Home Screen
One habit’s recent weeks, or the whole list and its year, with a button to tick today. Touch and hold the Home Screen, tap Edit, then Add Widget, and find Alto Daily. A habit’s page shows how, until a widget shows that habit.
Lock Screen
Today and the last seven days, on the Lock Screen.
Control Center and the Action button
Tick a habit from Control Center, the Lock Screen or the Action button, without opening the app.
On the Mac
The Mac has widgets too, for the desktop and Notification Center. A habit’s page in the panel shows how to add one.