FastRemind

FastRemind is an easy way to create reminders in seconds. Just open the app and type what and when you want to be reminded in natural language. FastRemind will understand at what time you want to set the reminder and adds it to your existing Apple Reminders, which syncs to all your other devices.

Type for example "Do laundry tomorrow 10 am" and it will create a reminder "Do laundry" for tomorrow at 10 am. 
You can also type things like "Call mom in 10 min" or "Buy water in 5 days".

FastRemind is also available for the Mac, where it is directly accessible from the menu bar. Making it even faster to create new reminders. The Mac version is free, if you've already purchased the iOS version.