Omar - 8/22/2018 12:13
I'd look at Microsoft's One Note. Set up a notebook on the cloud and share it with them. It's a free form white board type of thing. You can have sections, pages, etc.
If all you are looking for is a few words to describe the task, then a simple tasklist app might be better. But if you like the idea of dropping drawings, pictures and maps etc into a page to help them, then One Note might work.
I'm a big fan on OneNote as well as Excel or Numbers or Google Sheets for a spreadsheet. OneNote is the ticket for sharing lists. It can be as simple or as complex as you want it to be. You can edit on your computer or your iOS or Android device. It's just a really slick deal.