By Ear – Privacy Policy
By Ear is published by AREION QUANTUM, s.r.o., Chvalská 718/10, 198 00 Praha 14, Czech Republic, Company ID 19621809 (“we”). We are the controller of the data described here. This page says what the app sends from your phone, to whom, how long it is kept, and how to ask us to delete it.
In short
By Ear has no accounts. We do not know your name, your email address or who you are. Your practice history stays on your phone. The app counts a few anonymous steps, such as “a lesson was opened”, so we can see where people stop using it.
What stays on your phone
Your progress, your results, the sounds you mix up, a set you left half way and your choice of instrument are saved only on your device. They are not sent to us or to anyone else. Deleting the app deletes them.
What the app sends
When usage counting is switched on in the version you have, the app sends the following to Aptabase, an analytics service (aptabase.com), over an encrypted connection. When it is switched off, nothing is sent to Aptabase. None of it is linked to you, and none of it is used to track you across other apps or websites.
| What | Example | Why |
|---|---|---|
| Product interaction | The name of one of seven steps: lesson opened, first answer, set finished, review finished, paywall seen, purchase started, purchase done | To see where people stop |
| Session number | A random number made up each time the app starts, kept in memory only and never saved | To tell that two steps happened in the same visit |
| App version | 1.0.0 | To tell releases apart |
| Operating system | iOS 26.1 | To find problems tied to a system version |
| Language setting | en-US | To know which languages to support |
| IP address | Every internet request carries one. Aptabase states that it does not store it. | Needed to deliver the request |
| Country and region | Worked out by Aptabase from the IP address, for example “Germany, Bavaria”. No street, city or GPS position. | To know where the app is used |
To count visitors without keeping the IP address, Aptabase turns the IP address and the app and system details your phone sends into a one-way code mixed with a random value that changes every day and is deleted within 48 hours.
The steps carry no other details: not your answers, not your score, not which sounds you practised, nothing you typed.
Purchases
By Ear Pro is bought through Apple’s App Store. We never see your payment details or your Apple ID. To check whether a subscription is active, the app uses RevenueCat (revenuecat.com), which receives an anonymous identifier it creates for the installation and the history of purchases made in the app.
When the app starts, it also asks Apple’s AdServices framework for an attribution token and passes it to RevenueCat. Apple uses the token to say whether the install came from an Apple Search Ads ad and, if so, from which campaign, ad group and keyword; RevenueCat keeps that next to the anonymous identifier. The token contains no name, Apple ID, advertising identifier or device identifier, and it is not used to track you across other apps or websites.
What we never collect
Your name, email address, Apple ID, contacts, precise location, photos, microphone input, advertising identifier or any device identifier. The app does not use the microphone. There are no ads and no advertising SDKs.
Who receives data
- Aptabase – anonymous usage counts, as listed above.
- RevenueCat – the anonymous installation identifier, purchase history and the Apple Search Ads attribution token.
- Apple – payment for the subscription, under Apple’s own privacy policy.
We do not sell data and do not share it with advertisers.
How long it is kept
Data on your phone is kept until you delete the app. Usage counts are kept by Aptabase for at most five years, the limit in its own privacy policy, and we delete them sooner once we no longer need them. RevenueCat keeps purchase records for as long as the subscription exists and as its own policy and tax law require.
Legal basis
Anonymous usage counts: our legitimate interest in improving the app. Purchase records: performing the contract you enter when you subscribe.
Your rights and deletion
You can delete everything stored on your phone by deleting the app. Because nothing we receive is linked to you, we usually cannot find data belonging to a particular person. You can still write to hello@areionquantum.com to ask what we hold, to have it corrected or deleted, or to object to its use; we will answer within one month. You can also complain to the Czech data protection authority, Úřad pro ochranu osobních údajů (uoou.gov.cz), or the authority in your country.
Children
By Ear is not directed at children under 13 and we do not knowingly collect personal information from them.
This website
This website sets no cookies and loads nothing from other sites.
Changes
If what the app sends changes, this page changes first, with a new date at the top.