I've been selling themes at ThemeForest now for about a year and a half. Over this time, I've encountered a variety of issues, had to adapt to a series of changes and trends in the market. Just recently I released a new theme http://themeforest.net/item/urbannews-wp-magazine-theme/3509166, a magazine layout, responsive, etc. It started selling pretty well, but it didn't take long before I received some negative feedback. I was told that it wasn't working well on Android devices. I've not encountered this issue previously, and I don't have access to Android devices to test the compatibility. The customer who voiced this insisted that as a professional designer I should own a variety of devices to understand the full compatibility of my themes. ThemeForest does not require compatibility on all devices - but I always want to offer the best theme possible. Without owning every mobile device available - is it necessary to setup each virtual environment for testing purposes? Is it practical? Are Android devices so different from Apple devices that it requires special attention? Is it the responsibility of theme designers to offer full compatibility with every single device or is that unreasonable? If it is the responsibility, does any one have any suggestions how to best address these constantly evolving requirements? Thanks for any ideas, thoughts, suggestions!