Privacy Policy

The short version

KEEL has no accounts and no servers of its own. All microphone pitch detection and tone contour scoring happen 100% in real time on your iPhone's processor — your voice is never recorded to disk and never transmitted off your device. The free version shows adverts from Google AdMob; exactly what Google's advertising software collects is described under "Adverts" below.

Microphone & Voice Processing

KEEL uses your device's microphone solely to calculate fundamental frequency (pitch in Hz and cents deviation) while you are actively practising. Each short audio buffer (~46 milliseconds) is analysed in memory and immediately discarded. KEEL never saves audio recordings, never builds a voiceprint, and never sends audio over the network.

What KEEL stores on your device

KEEL stores your selected vocal range, your practice session scores and daily streak count, and a boolean flag recording whether KEEL Pro is unlocked on your Apple Account. All of these live exclusively in local on-device storage and are deleted when you uninstall the app.

Google's advertising components keep their own local settings on the device too, such as the state they need between launches and which region's advertising rules apply. Those are also removed when you delete the app.

Adverts

The free version of KEEL shows adverts supplied by Google AdMob. Every advert request KEEL makes is marked non-personalised (npa=1), which means Google is told not to use any personal profile to choose what you see. Adverts are also limited to content suitable for all ages (4+).

To deliver adverts, measure them and prevent fraud, Google's advertising software collects the following while the free version is running: device identifiers (the advertising identifier is not available to it, because KEEL never asks for tracking permission); your approximate location, derived from your IP address; advert interaction data, such as which adverts were shown and whether one was tapped; and diagnostic data, such as performance and crash information. Google may associate some of this data with your device. It is used for advertising, advert measurement, analytics and fraud prevention.

KEEL does not receive this data. Google processes it under its own privacy policy and the advertising terms KEEL operates under, which require Google to protect it. See policies.google.com/technologies/partner-sites and Google's data disclosure for this software at developers.google.com/admob/ios/privacy/data-disclosure.

KEEL does not ask for permission to track you across apps and websites, because it does not do that. KEEL Pro removes adverts entirely: the advertising software is not started at all for a Pro user.

If you are in Europe

KEEL does not show a consent prompt anywhere. In the EEA, the UK and Switzerland, Google therefore serves only "limited ads": they are not personalised, do not use device identifiers, and do not use cookies or local storage except to detect fraud. Google still uses your IP address to deliver them. See Google's description of limited ads.

Purchases

KEEL Pro is a one-time purchase handled entirely by Apple via StoreKit. KEEL never sees your payment details, your name, or your Apple Account. It asks Apple one question (is KEEL Pro active on this Apple Account?) and stores only the yes or no.

Retention, deletion and your choices

KEEL holds nothing about you on any server to request, correct, export or delete: what it stores on your device is deleted with the app. Data collected by Google's advertising software is kept by Google according to its own retention policy at policies.google.com/technologies/retention.

To stop that collection, buy KEEL Pro or delete the app. To ask about data Google holds, use policies.google.com/privacy, or contact us below and we will help.

Children

KEEL is a general-audience app. It is not directed at children under 13 and does not knowingly collect personal information from them.

Changes

If what KEEL or its advertising partner collects changes, this policy is updated before the version of the app that does it is released, and the date at the top changes with it.

Contact

KEEL is published by Box Labs Kft. Questions about this policy or your data: szabolcs@box-labs.com.