SumUp Air is probably the cheapest card reader with mobile app, but what can you expect for the low fees?
Elavon MobileMerchant is a mobile card reader without contract, monthly fees or revenue requirements, but it falls short with pricing.
Intuit Pay was discontinued in December 2015, so details in this article are outdated and no longer updated. For current card readers, see Square vs SumUp vs iZettle. QuickBooks integrates with PayPal for online payments. If you are looking for a mobile credit card reader, then there [...]