Hi John
The only requirement for now is PHP 5.3+, so it can works with PHP 5.4, 5.5 or 5.6. I haven't tested it with PHP 7 yet. As Joomla 3.5 supports PHP 7, I will test my extensions and make sure it supports PHP 5.7, too. However, to be honest, it could not be compatible with PHP 7 in less than 2 months as I am still quite busy now
Tuan
