iOS/Android: If you have a health condition that you can't really talk to friends and family about, ReachOut is an app that provides a social support network to help you cope. It aims to turn those well-meaning but hollow "Are you ok?" questions into "I'm here for you. I understand."
The app is free, easy to set up, and has a clean interface. When you create your account, you choose the challenges you face, which could be related to dealing with cancer, diabetes, heart disease, mental illness, substance abuse, or a recent death. On the main feed, you can scroll through stories and conversations of other users that are going through similar struggles, or reaching out to offer you support. If a particular conversation or person resonates with you, you have the option to "star," or save, the thread or person.
All in all, it's just a support network, but if your challenges wind up making you feel alone, a support network is exactly what you need.