Why not? Why do you need bloated, mobile unfriendly spreadsheet software to quickly take down some numbers in a tabular form? For e.g, If I'm around the house and want to record a few tape measure readings with my phone like a digital scrapbook, I can use this. I like the tabular format and ease of use.

If I need to jot down a quick note, I wouldn't use a word processor with all the inane amount of options. I would use a simple note app because all those word processing options serve no purpose and makes the simple task I'm trying to complete harder then it needs to be. Simplicity is a very convenient feature.