Android users will spend more money on apps and subscriptions than users of Apple Inc.’s products for the first time in 2017, according to a report released Wednesday.

App Annie, which focuses on data related to the mobile-app ecosystem, projects that users of Alphabet Inc.’s US:GOOGL US:GOOG Android operating system will spend $41 billion in total on apps and subscriptions in 2017, topping $40 billion for Apple. US:AAPL The company’s market forecast report said that Apple’s App Store racked up $34 billion in sales in 2016, while Android apps collected $27 billion.

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Apple will still have the most dominant single app store, however. While Alphabet’s Google has its own Google Play online destination for apps, there are several third-party offerings for devices that run on the Android operating system. For instance, Amazon.com Inc. US:AMZN devices like the Kindle tablet run on a modified version of Android, and Amazon has its own app store for those devices. App Annie projects that revenues for Google Play and third-party Android offerings will be roughly similar, with $21 billion in Google Play revenues and $20 billion for other offerings.

Danielle Levitas, senior vice president of research for App Annie, pointed out that Android should be expected to outpace Apple, since Android devices outnumber iOS devices by about a 5-to-1 ratio worldwide.

“So there’s much room for movement and while this shift might happen in 2017, ultimately, we forecast the App Store remaining the most lucrative store in the next five years,” Levitas said in an email.

The splintered nature of the Android app ecosystem and monolithic approach for Apple mirror the larger smartphone market, where Android phones and tablets outsell iPhones and iPads, but Apple reaps greater rewards from its sales. According to Gartner Inc., Android had more than 80% of the smartphone market share in 2016 while iOS was at 17.7%, yet Apple routinely takes a majority of global profits in selling its devices.

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Apple takes in much more revenue per user and per app downloaded, according to App Annie, which reported that Apple users downloaded 29 billion apps in 2016 against 118 billion total Android app downloads. That split is expected to grow this year, when the report projects 30 billion downloads from Apple’s App Store and 165 billion combined Android app downloads, and continue into the future. In 2021, App Annie projects that Apple will have 42 billion app downloads while Android will have 308 billion combined. While Android is projected to still have the revenue lead in 2021, the split is nowhere near as large as in downloads, with Android projected to collect $78 billion to Apple’s $60 billion.

“iOS will remain the most lucrative app store through 2021, generating $60.3 billion, thanks to growing revenue per device from Apple’s comparatively affluent customer base,” the report states. “However, the combination of Google Play and third-party Android is forecast to exceed iOS in 2017 as the sharp growth in installed base of Android devices makes up for lower user purchasing power.”

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Apple has highlighted its software and services growth in the past year, as iPhone sales have struggled to increase. While App Store revenue is not disclosed individually, executives said in a January conference call that the App Store had its strongest month ever in December, with sales topping $3 billion, and revenue grew 43% in the fourth quarter of 2016.

Google also wants to make Google Play a bigger part of its offerings, bringing the app store to its Chromebook line of low-price laptops as well as its virtual-reality platform, Daydream.

Apple stock has been hot of late, and hit another record closing high Wednesday after establishing its fifth record close of the month Tuesday. Apple shares have gained about 24% in the past three months and 34% in the past year, while Google’s class A shares have increased 5.8% and 10.9% in those periods. The S&P 500 index US:SPX has increased 5% in the past three months and 14.9% in the past year.

The biggest driver of app revenue is video games, App Annie reported. Games accounted for slightly less than 40% of total downloads across platforms, but more than 81% of revenue, which does not include advertising revenue that gaming companies collect outside the app ecosystem.