Square Up
I do art shows in the summers, and I was looking for a similar solution. I came across
Squareup which has an app and a "dongle" (swiper) that is compatible with my Droid Incredible (the app is avaible for Apple iOS and Android OS). We tried it out at a show a couple weeks ago and it worked great.
There's no contract, monthly charges, or hidden fees, which made it a winner for me. The "dongle" (swiper) is free and plugs into the headphone jack on the phones (or iPad). They take care of the PCI-compliance stuff, and there's no fees for that either. You can swipe Visa, MC, AmEx, and Discover.
The fee schedule is pretty clear:
Card Swipe Cost: 2.75% + $0.15
Card Keyed-in Cost: 3.5% + $0.15
If people want a receipt, it can be emailed straight to them during the transaction. The money shows up in your account in a day or two. (Depending on weekends, like every other service provider.)
The rates might be a little higher than other companies, but the Square service makes up for it in not having all those other fees attched to your account.
Also, since I was asked somewhere else when I mentioned this on another forum:
How much money can I accept?Square allows you to accept *unlimited* payments, period. There are no limits on transaction size or transactions.
How much money will Square deposit?As a new Square user, we will immediately deposit your first $1,001 of sales per week to your bank account, which means you have access to the money by tomorrow. Any remaining amount will be transferred to your bank account within 30 days of the transaction.
If you would like access to a higher deposit amount, please contact Support. They will ask you for some additional information about your business and then get the ball rolling.
Personally, this isn't a problem for me, but there have been people who didn't read the "Terms of Service" and we very surprised that when they swiped a card for $2,000 not all of it showed up in their account the next day.
If you have other questions about it, I'd be happy to help answer them.