Detect phone vs tablet

Question

Is there a way to detect if the user is using a tablet or a phone? As an example a person surfing the web using a tablet (any android tablet with version 3+ and iPad) they

Answer 1

Why try to guess what the user has when you can ask them? You can use the resolution to guess which sort of device is being used, and ask the user which view they want if it falls into the category of possibly mobile or tablet. If you detect it wrong then it's a nuisance for the user. Asking them once which type of device they have is more convenient in my opinion.