The Notes app is one of the most useful apps in iOS, in my opinion. Gone are the days of the sticky note or message on the back of your hand. See something you want to try out later? Copy and paste it into your notes. Grocery list? Notes. The usefulness of it is sometimes taken for granted amidst the more stand-out iOS apps. But did you know you can use Siri to search through all of your Notes?

You can prompt Siri to search through your notes on a specific day (find notes from January 4th, 2011), in a specific time frame (find notes from July), or create new notes (note to self, remind me to ...). You can also find notes with specific words (find notes with iPhone).