RiffBack
Send a musical phrase instead of a message. Play or hum four bars, send it to a friend, and they answer by adding their own notes on top.
Need a hand? Visit RiffBack Support for instructions and contact information.
Privacy Policy
Audio from the microphone
In Hum mode the app analyses microphone input on your device to work out which pitch you are singing. Only the resulting notes are kept. The audio itself is never recorded, never stored, and never leaves the device.
What a phrase contains
A phrase is musical data, not audio: which notes were played, when they started and how long they lasted, how hard they were struck, the instrument they were played on, and the colour they are drawn in. There is no text in a phrase — the app has no words in it.
Your account
Signing in with Apple gives the app a stable identifier for you, and — the first time only — the name and email address you choose to share. If you use Apple’s Hide My Email, the app only ever sees the relay address. Apple does not provide a profile photo, and the app does not ask for one.
Where it is stored
Phrases and account records are stored with Supabase, which hosts the app’s database. Data is kept for as long as your account exists, and is removed when you delete it. [[Confirm hosting region and retention before submission.]]
Who it is shared with
A phrase is visible to the person you send it to, and to nobody else. Phrases are never sold, never used to target advertising, and never shared with third parties. That holds whether or not you see ads: the music you make is not an input to any ad.
Advertising
The free tier is supported by ads, served by Google AdMob. A paid subscription removes them. Ads never appear while you are composing, humming, or listening to a phrase.
The AdMob SDK is present in the app from its first release, and it can read Apple’s advertising identifier (IDFA) to make ads more relevant. iOS asks your permission before that happens, and you can decline — in the App Tracking Transparency prompt, or later under Settings › Privacy & Security › Tracking. Declining does not cost you anything in the app; you simply see less relevant ads. Where local law requires it, a consent form appears before the tracking prompt. [[Confirm before submission that this matches the shipped build: whether ads are switched on at launch, and that the App Store privacy labels declare IDFA collection.]]
Children
The app is not directed at children under 13, and does not knowingly collect information from them.
Contact
Questions about privacy, or a request to see or delete your data, go to support@mikebritton.com.