On AnkiDroid, all text in the flash cards is center aligned. Is there a way to make it left aligned? I'm looking for a solution that does not involve editing each card. For example, is there a setting to make the text left aligned?
Yes, you can align text to the left.
For now there is no WYSIWYG editor, but you can do what you want with some simple HTML:
If you don't want to do it for each card, modify the card template using Anki Desktop.