Wordpress custom post title for custom post types

Hey guys,
I'm building an application website and creating a versioning system for it. I have already created the custom post type and its working flawlessly. The unique identifier for the custom post type is 'app_ver'.
Now, I want to create a custom title for this post type. That said, I just insert the version number in the post title and the output is generated in a string automatically. For example, I just insert "1.0.0" in the title and the output results as "Application version 1.0.0 released".

I have this code that does this partially:

 <?php 
add_filter('the_title', new_title);
function new_title($title) { 
return 'Application version '. $title. 'released';
}
?>

PHP:

But the problem is, it changes the title of ALL titles including pages as well. I want it to only change the title of posts made under 'app_ver'.

I've tried this too but its not working. Something is wrong in this code.

add_filter('the_title', 'new_title');
function new_title($title) {
	global $post, $post_ID;
	$title['app_ver'] = 'Application Name v'.$title;
	return $title;
}

PHP:

Help is greatly appreciated~