How to remove/disable on iOS/Android the “App install banner”?

[devnoname120]

Question from @Michele1, the original topic is closed so I’m reposting it here in order to be able to answer.

@Michele1

Hello,
I’m using the last version of NextCloud and in particular to show pdf shared files on the website but every time a user open a file, on the top is visibile a banner that suggest to download the Nextcloud App. Is there a way to hide it?

I think the code to remove (or comment) can be found in these pages:
core/templates/layout.guest.php
core/templates/layout.public.php
core/templates/layout.user.php

<?php if ($theme->getiTunesAppId() !== '') { ?>
<meta name="apple-itunes-app" content="app-id=<?php p($theme->getiTunesAppId()); ?>">
<?php } ?>

In the “Theming” section I can’t find anything to do it directly from the control panel.
Also I think that if I comment this meta tag in the three files above, probably they could be overwritten at each Nextcloud update.

How can I fix it?
Is there an instruction to put on config.php to do it?
I think it’s not very professional to constantly show a banner with the name of “Marino Faggiana”.
It may give the impression that you are no longer on the company’s website.
Thanks.

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Answer: you can simply run this, it will make Nextcloud think that the app doesn’t exist and thus it won’t display the mobile app banner anymore:

occ config:app:set theming iTunesAppId --value=""