An issue was discovered in the RENPHO application 3.0.0 for iOS. It transmits JSON data unencrypted to a server without an integrity check, if a user changes personal data in his profile tab (e.g., exposure of his birthday) or logs into his account (i.e., exposure of credentials).
https://renpho.com/pages/contact-us
https://apps.apple.com/us/app/renpho/id1219889310
http://packetstormsecurity.com/files/154772/RENPHO-3.0.0-Information-Disclosure.html