What about cash? Sure, it still works. However, come April 15, you may wish you had documentation that IRS will accept so you can take those charitable deductions that you may need. What about credit cards? Of course, they will work. However, they’re a little unwieldy when the collection plate passes down your pew. So, take a look at the new apps. PayPal ‘s mobile is the most popular. But take a look at FlowPay, SimpleGive, Clover Donations, EasyTithe – and the other options that your own bank or credit card company may offer.