Hello World Obtenir l'app

Pourquoi Hello World demande des autorisations

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Hello World asks for a permission at the moment it needs one, never at sign-up, and every one of them can be refused without the app becoming unusable.

iOS asks you once per permission. You can change any answer later in the iPhone’s own Settings › Hello World, and nothing here is asked for again behind your back.

Microphone

Asked when: you first record a voice message, or place or answer a call.

Used for voice and video calls, for the voice messages Hello World translates for the people you talk to, and — only if you choose to set it up — to record the samples that let your translated voice sound like you.

What leaves your phone: the recording. A voice message is uploaded to our server so it can be transcribed, translated and delivered. Call audio goes to the person you are calling, directly between the two phones when the network allows and through our relay when it does not.

If you refuse: you can still read and write messages and receive calls you cannot speak on. Nothing else is affected.

Camera

Asked when: you first open the camera, start a video call, or scan someone’s code.

Used for video calls, for the photos and videos you send, for the effects you can apply to your own face, and to scan a friend’s profile code.

What leaves your phone: what you choose to send. Video-call frames go to the person you are calling. A photo or video you send is uploaded to our server so it can be delivered. The face effects run entirely on your phone — nothing about your face is sent anywhere, and no face data is stored.

If you refuse: you can still receive video calls and see other people’s pictures. You can still send photos from your library, which does not use the camera.

Photos

Asked when: you save a picture somebody sent you, or save your own capture to your library.

Hello World asks for add-only access to your photo library — permission to put a picture in, not to read what is already there.

Sending a photo does not need this permission and does not use it. When you attach a picture, iOS shows you its own picker, which runs outside Hello World; the app receives only the picture you selected and never sees the rest of your library. That is why Hello World does not ask for photo-library read access at all.

What leaves your phone: only the picture you chose to send. Photographs and videos are both stripped of their embedded metadata before upload, including the GPS coordinates a phone writes into a file recording where it was taken.

Contacts

Asked when: you open “Invite from contacts”. Nowhere else.

Used to tell you which of the people in your address book already use Hello World.

What leaves your phone: not your contacts. Names are never sent. Each phone number and email address is turned into a one-way fingerprint on your phone — a hash — and only those fingerprints are sent, compared against the fingerprints of existing accounts, and discarded. The server keeps nothing from the request.

We should be precise rather than flattering about what that protects: a hash of a phone number is not anonymous, because there are few enough possible phone numbers to work through. The protection is that we discard them and never build an address book of our own, not that the hashing makes them unreadable.

If a fingerprint matches someone who already has an account, that person may be told you have joined. Invitations are sent by you, through your phone’s own share sheet — Hello World never messages anyone on your behalf.

If you refuse: everything works. You add people by username, phone number or by scanning their code.

Location

Asked when: you attach a place to a post, share your location in a chat, or put your business on the map.

Hello World asks for while using the app access only. It never asks for background or “always” location, and it does not track you.

What leaves your phone:

If you refuse: everything works except attaching a place, which becomes a manual search.

Speech recognition

Asked when: you first record a voice message.

Used to turn what you said into text, so that it can be translated.

Where it happens: on your phone. Hello World requires on-device recognition and refuses to transcribe rather than falling back to Apple’s servers, so the audio is not sent to Apple. The resulting text is sent to our server with the recording, because translating it is the point.

Notifications

Asked when: shortly after you first sign in.

Used to tell you about messages, calls, and things that happen in your circles. An incoming call needs this: without it, a call arrives as a notification you have to notice rather than a ringing phone.

What leaves your phone: a token from Apple identifying this installation, which lets our server ask Apple to deliver a notification. Notification text passes through Apple’s servers, as it does for every iPhone app.

If you refuse: the app works, but you will only see messages and missed calls when you open it.

Face ID

Asked when: you turn on the app lock in Settings.

Used to unlock Hello World.

What leaves your phone: nothing. iOS answers only “yes” or “no”. Your face is never available to Hello World, is never stored by us, and is never transmitted. This is true of every app on iOS and it is worth saying plainly.

Calendar

Asked when: you accept a suggestion to add an event.

Hello World asks for write-only calendar access: it can add an event you confirmed, and it cannot read your calendar.

If you refuse: nothing else changes.

What Hello World never asks for