I don't store any of your data at all. All your data is yours. The following services are used and you may refer to their privacy policy to see how they may use your data.
Depth is a Twitter client, so it makes requests to Twitter’s service. Please refer to Twitter’s privacy policy for more details on what they may do with that data.
Depth uses Apple's iCloud service to store some of your configurations so that you can retrieve them back if you uses iCloud Storage on your device. All data is stored in Apple's server. Please refer to Apple's privacy policy for more details.