Captio is a productivity app available for iPhone that allows users to send themselves quick notes with just one tap. The app is simple, reliable, and fast, making it an ideal tool for capturing ideas or tasks on the go.

Captio's notes are delivered instantly to the user's email inbox or stored temporarily on the device while offline. The app is designed to minimize distractions, providing a straightforward interface that is easy to use.

Users can also utilize the share extension to send themselves text, links to web pages, and photos from within other apps. Captio can be configured to use an IMAP account, which puts notes directly into the user's inbox for added security and privacy. However, without any configuration, Captio sends notes using Amazon's SES mail servers.

Overall, Captio is a great tool for anyone looking for a fast and easy way to send themselves notes and reminders. The app's privacy policy is also worth noting, as it does not collect or share any personal information.