1. You can click the+button to add content notes in Apple memo, and you can add text, pictures and other contents for notes.
2. If you want to use post-it notes in Apple's mobile phone, you can try cloud post-it notes.
3. Post-it notes in the cloud post-it notes are automatically uploaded to the cloud for saving, and not only can text post-it notes be added by classification, but also regular reminders can be set for to-do items.