Simplist
Problem
There are many to-do list apps out there, but often, they are overloaded with features. This typically detracts from the simplicity of what a checklist is meant to accomplish. These days, when I need to create a quick checklist, I simply open my Notes app on my iPhone.
Solution
Create a simple checklist app with just the essentials. I designed something that is minimal and clean, without any extra features such as time, day, or location. Simply create an item, check it off, and move on.