Letter to Yourself - Send a physical letter to your future self
Cryptoradar - Find the best prices to buy or sell cryptocurrencies
Future Me - Send an email to your future self
Crypto Price Tracker - An app for all your cryptocurrency needs!
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.
Bitdock - Track cryptocurrency price index in the MacOS menu bar