European customers of Coinbase have been able to buy bitcoin and ethereum using debit and credit cards for a little over a year. Now, they can do it on mobile, too.

Strong numbers from the U.S. seem to support the move. Announcing the new functionality on the its blog, Coinbase noted that 40% of its credit and debit card purchases of digital currencies in the U.S. are coming from mobile devices. “Our mission at Coinbase is to create an open financial system for the world,” the post read, “and enabling easy access to digital currencies like bitcoin and ether in as many countries as possible gets us one step closer to that goal.”

Indeed. Coinbase last month added Australia, Canada, and Singapore to the list of countries where Coinbase customers can use payment cards to buy digital currencies. The company added support for ethereum earlier this year, and enabled PayPal and credit cards for bitcoin sales and purchases, respectively, in June. Coinbase launched the U.S. beta of its instant bitcoin purchase via debit card in March and expanded the service to all U.S. customers later in the spring.

Coinbase’s free mobile wallet works for both Android and iOS (in addition to online). Customers can create a digital wallet, connect a bank account, debit, or credit card, and then begin buying both bitcoin and ether on the Coinbase exchange.

Founded in 2012 and headquartered in San Francisco, California, Coinbase demonstrated its Instant Exchange technology at FinovateSpring 2014. The company has raised more than $117 million in funding, including a strategic investment of $10.5 million from Bank of Tokyo Mitsubishi UFJ in July. Coinbase has exchanged more than $4 billion in digital currency and served more than four million customers in 33 countries.

Starting this week, traders will be able to buy and sell the digital currency Ether on bitcoin-exchange Coinbase.

Ether, the digital currency used by the Ethereum platform, has gained traction among financial institutions like Barclays and UBS. Corporations such as IBM have also expressed interest in the technology and how it could enable communications and transactions between connected devices in an internet-of-things world.

According to Adam White, Coinbase VP of business development, bitcoin and ether are not necessarily competitors, meaning the addition of ether could help boost trading volumes for the exchange. Ether is the second most widely traded cryptocurrency behind bitcoin, with $44 million in average daily trading volume compared to bitcoin’s $134 million. And while both digital assets can serve as alternative currencies, ether can also be used to help developers build and run distributed applications and smart contracts on the Ethereum platform. Ethereum is a public decentralized blockchain, co-founded and created by Russian-Canadian programmer Vitalik Buterin.

Coinbase is expected to make an official announcement on Tuesday, March 24.

Pictured (let to right): Business Development Managers Nahid Samsami and Roger Gu demonstrated Coinbase Instant Exchange at FinovateSpring 2014 in San Jose.

The decision to add ether comes as part of a rebranding of Coinbase’s exchange service. The platform will be renamed “GDAX” (Global Digital Asset Exchange). The company will continue to provide basic “dollar for bitcoin/ether” conversions under the Coinbase brand.

Recent headlines for Coinbase include earning a spot on Fast Company’s Most Innovative list back in February. The company was featured in a round up of blockchain-powered digital wallets in April and added stop orders to its exchange platform in March. Coinbase enabled bitcoin purchases by debit card in March, as well,

Founded in 2012 and headquartered in San Francisco, Coinbase demonstrated its Instant Exchange technology at FinovateSpring 2014. The bitcoin wallet and platform has 3.8 million users and has raised more than $106 million from investors including Andreessen Horowitz, BBVA, USAA, and Ribbit Capital.