Captured makes it easy to remember anything, instantly. Open the app, type what you want to capture and press Done. Its instantly added to the built in Reminders app on your phone.
Whats so great about adding to Reminders? In addition to being a surprisingly useful place to keep your ideas, to do apps like Things and OmniFocus integrate with Reminders, allowing you to instantly add things to your Inbox. Very handy. Try it, youll like it.