Privacy Policy: https://pistats.io/privacy-policy
We collect and store data which are provided by Google OAuth authentication:
first Name, last name, gender, email, all your Lyft and Uber
receipts, Google+ profile link, Google+ profile picture link
Sign-in with Gmail, and their privacy policy allows full access to your email. But it's OK, they're not sharing it with anyone (promise).
Elsewhere they say they're only reading the Uber and Lyft emails... but I'm not sure that matters as it's the privacy policy which counts.