Venmo is a mobile payment service owned by PayPal. Venmo account holders can transfer funds to others via a mobile phone app; both the sender and receiver have to live in the U.S. It handled $12 billion in transactions in the first quarter of 2018.

Google Pay

Google Pay is a digital wallet platform and online payment system developed by Google to power in-app and tap-to-pay purchases on mobile devices, enabling users to make payments with Android phones, tablets or watches. Users in the United States and India can also use an iOS device, albeit with limited functionality.


Bitcoin is a cryptocurrency created in 2009. Marketplaces called “bitcoin exchanges” allow people to buy or sell bitcoins using different currencies. Bitcoin is a new currency that was created in 2009 by an unknown person using the alias Satoshi Nakamoto.

Cash App

Cash App is a peer-to-peer payment service that allows you to send, receive and request money. … Companies pay Cash App particular fees so customers can use their phones to pay for goods and services. It’s essentially a digital wallet that eliminates the need for cash or traditional credit cards.


Zelle is an easy way to send money directly between almost any U.S. bank accounts typically within minutes1. With just an email address or mobile phone number, you can quickly, safely and easily send and receive money with more people, regardless of where they bank.


PayPal is the faster, safer way to send money, make an online payment, receive money or set up a merchant account.

Bank account

bank account is a financial account maintained by a bank or other financial institution in which the financial transactions between the bank and a customer are recorded. … Funds can be withdrawn from loan accounts.


Radioimmunoassay (RIA) is a sensitive and quantitative method used to measure the concentration of antigens in vitro. It is first development in 1950s[1]. Nanomolar and picomolar concentrations of hormones in biological fluids can be detected by RIA.