Mabayui is published by Nodera LLC, in Tokyo,
Japan.
It collects no personal data. It has no network code of its own and its game engine's online
services are switched off, so nothing is sent to us. The one exception is buying a stage: the
purchase and Restore Purchases go through Apple's App Store, under Apple's terms, and we receive
nothing about you from it.
What is stored
Mabayui saves your settings on your device, including Guide mode, whether you have skipped the
tutorial, and a local record of purchased stages. The App Store's purchase records determine which
stages you own; the local record is used as a cache.
The App Store releases of versions 0.0.2 and 0.0.3, and the Google Play release of version 0.0.3,
also save a gameplay log on your device. It contains up to 500 entries, one for each cycle of a stage's music. Each entry contains the date and time, the stage
name, numerical measures of how the music built up, and a score. The app does not display this
log.
Starting with version 0.0.4, the App Store and Google Play releases of Mabayui no longer record
these entries. When the updated app is opened, it uses any existing log to preserve an indication that the app has been
played, then deletes the log.
Mabayui does not transmit these locally stored records to Nodera LLC. The app has no account and
does not ask for your name, email address, or sign-in.
Deleting the app removes its locally stored data from your device. Depending on your settings,
app data may also be included in iCloud or computer backups. Copies in existing backups may remain
until those backups are deleted.
Correction, 5 November 2026
An earlier version of this policy incorrectly stated that Mabayui did not save scores. In versions
0.0.2 and 0.0.3, the app saved the local gameplay log described above. This log was not displayed in
the app or transmitted by Mabayui.
Keeping and deleting
There is nothing to keep and nothing to request. Nothing from the app reaches us, so there is
nothing on our side to erase — a request to delete your data would have nothing to act on. Deleting the app
removes everything it put on the device.
What is not collected
No analytics. No advertising and no advertising identifier. No crash or performance reporting
of its own. No location, no microphone, no camera, no contacts: the app asks the system for nothing
but the screen, touch and the audio output. The sound is made on the device; the app contains no
recordings.
If you have turned on iOS's own Share with App Developers setting, Apple may
share crash logs for this app with us. This is handled by Apple, not by the app. The app neither
collects these logs itself nor controls that setting.
In App Store terms, this is Data Not Collected.
Beta testing
If you test Mabayui through TestFlight, Apple's TestFlight service handles your invitation and
any feedback or screenshots you choose to send. That is covered by Apple's own terms. Development
and TestFlight builds continue to save the gameplay log locally for testing. Mabayui does not transmit
this log. TestFlight separately shares crash reports and usage information with the developer through
Apple, as well as feedback if you submit it.
This website
The app itself never contacts a server. This website does, as every website does:
our server writes a line for each request it answers — the time, the page asked for, your IP
address, the page you came from, and what your browser reports about itself, such as its name and
language. From the IP address we look up the country, region, and network it belongs to.
We use these lines to count how many people find this website and where they come from, and to
find the cause when something goes wrong. They are kept on our own servers, with a backup copy in
cloud storage, until we delete them. We do not sell or share them, and we do not join them with
anything else.
The pages set no cookies, store nothing in your browser, and load nothing from anyone else.
Links out
The About tab of the app's menu links to this Privacy Policy, the Support page and the Legal
Notice. They open in your browser like any other link.
Children
The app collects nothing from anyone, of any age.
Governing law
This policy is governed by the laws of Japan.
Changes
If a future version of Mabayui ever collects anything, this page will say so before that
version ships, and the date below will change.
Contact