SACKGRAM Privacy Messenger

■ Different from the moment you sign up
SACKGRAM does not ask for your phone number, email address or real name. All you need to start is a SACKGRAM ID of your choice and a password.

■ You connect only with people you choose
On SACKGRAM, every connection starts with a QR code or a dedicated link. You do not need to give your phone number or email address to someone you do not yet trust. People you have not connected with cannot message or call you, and no ads reach you either.

■ Conversations open only on the two phones — End-to-end encryption
Messages, photos, videos, files and call audio are end-to-end encrypted. They are encrypted on the sending phone and can be decrypted only on the receiving phone. Anyone who intercepts them along the way cannot read them, and neither can SACKGRAM. This encryption is free for every user.

■ What you delete disappears from three places — Triple Evaporation
You can set an evaporation timer for each room, from 1 minute to 7 days. You can delete a message you sent, for both sides, at any time by pressing and holding it.
Messages, photos and files you delete, and records whose evaporation time has passed (including call records), disappear from three places — the app screen, both phones, and Google Cloud — and cannot be recovered. Messages, photos and files that reach Google Cloud through the SACKGRAM app are, from the start, encrypted digital code that no one can read, and Triple Evaporation deletes even that.
SACKGRAM does not run a central server of its own.

■ Protecting your voice — Voice Privacy
Technology that can clone a voice from a short sample (about 3 seconds) is known to exist. During a call, SACKGRAM changes the pitch of your voice inside your phone before sending it. Your real voice does not leave your phone, which lowers the chance that your voice can be cloned. How you speak and how fast you speak stay the same, so the conversation still flows naturally.
When Voice Privacy is on, the other person's screen shows it, so you both know.

■ Protecting your location — Call IP protection (Location Privacy)
With the default setting, SACKGRAM's one-to-one calls connect through a relay, so the other person cannot learn your IP address. This protection is free for every user, and you can turn it off in Settings. SACKGRAM also does not collect GPS location, and removes location data from the photos and videos you send, whether you send them as a photo or as a file. If a phone cannot remove it from a particular photo, the app tells you before you send it.

■ Designed to leave less behind
• SACKGRAM has no video calls, so that your face is not left behind in digital space.
• Screenshots and screen recording are blocked on main screens such as conversations, calls, photos and videos.
• Messages, photos, videos and files you receive cannot be forwarded to others or copied inside SACKGRAM. Only the sender can send them again.
• If the other person is using Voice Privacy or a speakerphone, you are told on screen.
• Scan QR opens only SACKGRAM invite codes. Any other QR code of unknown origin is not opened; its contents are shown as plain text.

■ Everplace rooms — your own place that people can find from anywhere (SACKGRAM EVERPLACE)
An Everplace room is a space for shops and organizations. The owner makes a signboard with Name · One line about it · Address · When you're open · Photos · News & promotions, and can update it with new news at any time. The signboard's QR code does not expire (while you are on the Gold plan), so you can print it on business cards or display it in your shop and keep using it. It is a digital business card you can hand out freely.

■ No ads — supported by subscriptions
Privacy features are the same on every plan. SACKGRAM is designed not to collect personal information for advertising in the first place, which is why it runs on paid subscriptions instead of ads.