Future Me - Send an email to your future self
Punkt - Private & secure one-sentence journaling
Dabble Me - Your own private place to write. A journal/diary to help you remember what's happened in your life.
Happyfeed - A simple gratitude journal for iOS
Letter to my future self - Letter to my future self is a prominent email scheduling service that gives you the opportunity to create a letter with goals and thoughts for your future self and schedule a date for sending it.
Dear Diary AI - Take a break and add some peace to your day