These little guys work well on both Android Tablets and Android Smartphones. I've only kept one and gave the others to friends. Currently works great on Galaxy S, Galaxy S2, and Galaxy S3, and the tablets that it worked on was the Asus Transformer, Asus Transformer Prime, Samsung Galaxy Tab, Ipad 3rd Generation, and Ipad Mini. Those are all the devices we have tried it on. It didn't work with the Galaxy Tab 10.1, because it utilizes a specialized pen (Galaxy S Pen). Other than that, this was a cool little gadget to have and it's anchor fits very snug into the 3.5 audio jacks. Great price too, I'd totally recommend for anyone.