Android Pay, Alphabet’s successor to Google Wallet and its answer to Apple Pay, is allowing in-app purchases starting today. This is a feature that Apple Pay has had since day one, and it’s a feature that Google Wallet has had as well.

The advantage of including in-app payments through a platform like Android Pay is that developers can add an Android Pay logo to their check-out sections, and users, who ideally have their card information stored with Android Pay already, can check out with a single tap (and then a second tap just to confirm the user’s information). No need for a customer to fumble for their credit card every time they need to buy something in a new app. The hope for app developers is that an easier checkout leads to more sales—there's less second-guessing if you shorten the time it takes to make the purchase.

Android Pay launched in early September, almost a year after Apple Pay launched. Android’s payment platform was essentially a rebranded version of Google Wallet’s original form, allowing users to make payments in select brick-and-mortar stores by tapping their phones to check-out terminals using near field communications (NFC). Today, with the addition of in-app payments, Android Pay becomes a real competitor for market share with Apple Pay.

Some apps that now include an Android Pay in-app checkout feature include DoorDash, Jet.com, Lyft, and OpenTable. To garner support for the new feature, Android Pay users will be given discounts for a limited time ($20 off OpenTable dining or $10 off a Lyft ride, for example.)

In September, Samsung also announced its own payment platform, called Samsung Pay. Samsung’s vast customer base and its purchase of a patented technology that allows its new phones to send credit card information to check-out terminals that aren’t equipped with NFC technology, made it a contender against Apple Pay and Android Pay. But Samsung Pay also launched without support from telecom company Verizon, nor did it have many partner banks, which limited the number of people who could sign up for Samsung Pay.

In recent months, however, Samsung was able to secure Verizon’s support for its payment platform, and today it announced a partnership with 19 new Visa and MasterCard issuers.

While Android Pay and Samsung Pay have long been stragglers, it seems they’re doing their best to catch up.

Correction: Google Wallet never shuttered its in-app purchase program. Instead it will be migrating legacy Wallet merchants to Android Pay.