CryptoG is a simple Python script that uses Twilio and Coinbase's API to send SMS alerts whenever the price of Bitcoin changes by a significant amount.
To install and use CryptoG, download the required libraries from requirements.txt, fill out config.yml with your desired configuration, then run python cryptog.py.
In config.yml, you have the ability to define a few parameters such as the update period and change threshold. See example_config.yml for an example config file.
In the future, I plan to add support for LTC and ETH.