Square's application will run on the i Phone 3G, but Pay Pal Here's application is compatible only with 3GS phones and above.

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Although Pay Pal Here hit the market with support for only i Phone/i Pad, the company now supports Android devices as well.

Both companies now support i Phone, i Pad and Android, but the edge goes to Square for supporting older operating systems.

Square will give the ability to process credit cards to virtually anyone.

Whether this is a good thing or not is open for debate, but it's a leg up on Pay Pal.

Pay Pal Here has taken the mobile payments market by storm with a smartphone processing solution that in several ways gets the better of the current market leader, Square. Let's take a look at how the two companies compare on key areas such as pricing, customer service, equipment, and more.

With Pay Pal Here featuring live customer support, immediate funding, and support for multiple payment channels including free check acceptance, it seems as though Square has some catching up to do despite the company's rapid growth.Both services offer similar functionality, but Pay Pal's user base is significantly larger.Looking past a somewhat dead heat with first name payment services, Pay Pal edges ahead with check processing and the option to accept PIN-based debit using a specific reader.Pay Pal provides phone, email, and online support for its users.And the company also provides support via a development community.Both companies provide encrypted card readers and other security and fraud protection features.