I've just upgraded to JS4 and it's great thanks :)

I have created an app which I do not want displayed in a tab, instead at the very top of the profile just under the cover photo. So what I have done is override the com_community/layouts/profile/base.php and added the application like this:

<?php
$appplugin = CAppPlugins::getInstance();
$app = $appplugin->getPlugin('player');
$jinput = JFactory::getApplication()->input;
$userid = $jinput->get('userid', 0, 'INT');
$rendered_app = $appplugin->renderPlugin($app, $userid);
?>

<div class="joms-body">
    <?php echo $rendered_app->data; ?>
</div>

Hi.

I'm sorry but at the moment customization request have lowest priority as many users are posting on forum and require support.
So you'll have to customize it by yourself or ask professional developer for help.
I'm sorry but we just can't effort to support customizations at the moment...
Maybe a bit later when everything settles down ;)