PaymentSpring is described as 'Payment SaaS – the all-in-one, developer-driven, Mobile payment gateway. Dive into our powerful payment processing gateway designed for software platforms, businesses and nonprofits ready to accept more. Take a closer look' and is a Payment Processing Service in the Business & Commerce category. There are more than 100 alternatives to PaymentSpring for a variety of platforms, including Online / Web-based, iPhone, Android, iPad and Windows. The best alternative is PayPal. It's not free, so if you're looking for a free alternative, you could try Open Collective or Litecoin. Other great apps like PaymentSpring are Wise (Paid), Flattr (Paid), Stripe (Paid) and Google Pay (Free).
Flattr is a social micropayment service, that makes it easy for you to "flatter" things on the internet that you like. When you're registered to Flattr, you pay a small monthly fee of your own choosing.
Stripe helps you create any type of payments flow—from e-commerce to recurring billing and everything in between. Stripe enables you to accept payments in minutes. Stripe makes recurring and subscription-based billing easy.
Google Pay is the fast, simple way to pay with Google online, in stores, and more. Book a trip, grab a meal, see a show, and enjoy new experiences—all without your wallet. Just add a card once from a participating bank and you’re ready to go.
Wallet keeps things like airline boarding passes, movie tickets, and gift cards all in one place, letting you scan your iPhone or iPod touch to check in for a flight, get into a movie, redeem a coupon, and more. Wallet is what you would use to set up Apple Pay.