Contact
Send bug reports and questions to mtfujikun.developer@gmail.com. We reply in English and Japanese.
Including your device model, iOS version, and the steps you took helps us investigate faster. We cannot decrypt post contents, so we cannot inspect your conversation to diagnose a problem.
Frequently Asked Questions
The home screen looks like a disk management tool
That is intentional. Sector normally shows a disk-utility-style screen so that someone looking over your shoulder cannot tell it is a social app. It is a privacy feature; the app is a closed social network.
I cannot join a sector
Joining requires the person inviting and the people joining to be in the same place. Please check that:
- everyone is within about 100 meters of each other;
- Bluetooth is on for every device;
- Sector is allowed to use location on every device (iOS Settings > Sector);
- the entrance procedure has a time limit — if it expires, start again from the invitation.
Joining remotely is not possible by design. This is what prevents someone you did not invite from joining from elsewhere.
My posts disappeared
That is by design. Posts are deleted automatically from both the server and the device 24 hours after they are posted. They cannot be recovered.
The screen suddenly goes black
That is a privacy feature. It triggers when:
- the proximity sensor at the top center of the device is covered (for example, when you place the phone face down); or
- a screenshot or screen recording is taken.
To return, tap the button shown on the blacked-out screen. It never returns automatically, so the conversation is not exposed by accident.
I was removed from a sector and cannot get back in
Any participant in a sector can remove another participant. Once removed, getting back in requires going through the in-person entrance procedure again.
I want to report someone
Use the menu on the chat screen. Reporting seals the conversation for that sector stored on your device — including messages written by other participants — and sends it to the developer for review. Other participants are not told that you reported.
I want to erase my data
In the app's settings screen, choose "Delete this device's data". This erases everything on the device and your key material on the server. It cannot be undone. See the Privacy Policy for what is retained even after deletion.
Supported devices
iPhone only. iPad is not supported.