Kullo is a secure communication solution.

Features:

• Communicate with your colleagues and friends across national borders and access your personal inbox on your mobile devices, no matter where you are.
• We integrate industry leading end-​to-​end encryption right into the product. Literally no one apart from you and the recipient can read your documents - including us.
• By hiding all the technical details and removing all distractions, you can simply focus on your content with your contacts.