I'm surprised by the negative reviews… I'm surprised by the negative reviews about their billing practices and my heart goes out to people who go through frustrating experiences. With that being said, my experience is that this is a great interface for testing how my website looks on different devices. I wouldn't be able to do it without them. My problem has more to do with my site not loading on some of the test results. I'm not sure if it is my site's load speed that is causing the issue. I will optimize my website load time and then come back and edit this review. Other than that I am very pleased with this product.

Extremely deceptive pricing, massive charges without any notice Extremely deceptive pricing. Essentially robbery. Beware! They will auto-renew your plan annually without any notice whatsoever! You won't receive any email whatsoever before they slap you with a sudden annual renewal fee up to >$1,000, even if you stopped using the product ages ago. Note that there is NO CANCEL BUTTON ANYWHERE ON THE WEBSITE. They expect you to manually email them before the auto-renewal period. If you ask for any refund for the surprise charge, they will tell you they have a "strict no-refund policy". Avoid this company. Their business model is deception.

Be careful Information that they automatically write off money every month is not advertised when you register and make the first installment. The subscription must be changed manually. Because of this, they wrote off my money for a month, although I don't need their services for the next month. However, they do not make returns. Disgusting.

A big Scam. A big Scam. I wanted to try it for 20 minutes and I payed 20$ for a really bad experience. A month later (of course they are charging at the beginning of the month) I've noticed they are still charging my account for another 20$. There is no button for canceling subscription, no chat, still waiting for support to answer my emails. Stay away from this kind of scams and especially don't supply them with your credit info because this one also cannot be deleted.

Get the paid version I wouldn't be able to develop anything without this. You have to get the paid plan to make any use of it - but it's definetely worth it.