StipaCaller

StipaCaller is a private, invite-only messaging and calling app for family and close friends. Messages are end-to-end encrypted. No phone number required, no ads, no tracking. Features - End-to-end encrypted chat — only the intended recipient can decrypt a message; the server holds ciphertext. - 1:1 voice and video calls over WebRTC with DTLS-SRTP encryption. - Group chats with the same end-to-end encryption — a small circle, not a public room. - Voice messages — hold to record, release to send. - Send photos directly in chat, or from any other app via the system share sheet. - Works on Wi-Fi or mobile data, even on cellular networks that usually block direct connections. - Push notifications wake the app for incoming calls and messages, even when backgrounded. - Delivery receipts so you know your message arrived. Privacy - No phone number — pick a handle. - No address book upload; contacts are added via one-time invite codes. - No ads, no analytics, no advertising IDs, no third-party tracking. - Push notifications carry no message content — incoming text is decrypted on your device only. - Call audio and video travel as encrypted bytes end-to-end. If a direct connection isn't possible, the server only relays encrypted bytes — it can't decode them. Permissions - Microphone — only during voice or video calls and voice messages. - Camera — only when video is on during a call or when you choose to send a photo. - Notifications — for incoming calls and messages. - Network — to reach the server. How it works StipaCaller is invite-only by design. To sign up, you need a one-time invite code from someone already on the app. Codes are short, expire after seven days, and each one is for a single person. This keeps the network small and trusted.