What it is
Every Locksee chat, voice call, and video call is encrypted on the device before it leaves. Locksee cannot open the content or sit in on a call.
Vs typical messengers
WhatsApp and Signal also encrypt chats. Encryption is the floor. Locksee still encrypts chats and calls on the device — then adds a numberless door so the address book is not the product.
Official company page: What is Locksee. All features: Guide.