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Everyone would have different interpretations of what leads to high customer retention and high app ratings depending on the contexts. In the field of mobile app testing, the key to the optimum is really about maximizing your device coverage and ensuring your app testing cover the majority of popular devices that your customers use. And that is also one of the biggest benefits that you can reap from mobile device cloud vendors.

The Status Quo of Device Models

Overall, Apple still corners the smartphone market in many countries and territories, with 9 to 14 of its variants being listed in the top 20 devices. While the Android giant has much better performance in other regions, Samsung only shares a slice in North America.

Now within iOS ecosystem, the ranking hasn’t changed much compared to the stats in Q2. And what’s interesting is that the one-year-old iPhone X hasn’t been able to lock its position in top 3 in all countries we’ve been following. On the Android side, Samsung Galaxy S9 and S9+ released in March 2018 are among the top 20 devices in the US, but they still need some efforts to take over the positions from the predecessors.

Q3'18 Mobile Device Market Share - USA
* Device stats at the end of Q3’2018

Naturally it takes time for the latest flagship devices to gain market share, and it may even take much longer than it used to in consideration that it has become such a saturated market. It might be a long way for the following devices to win a position.

  • Samsung Galaxy Note 9, released in August
  • iPhone Xs and Xs MAX, released in September
  • Google Pixel 3 and 3 XL, released in October

As for device testing, it’s crucial to incorporate all the top devices and flagships into your testing list of target devices as they account for more or less 65% of the smartphone market share (Find them on Bitbar Cloud).

The Status of OS Adoption

After two months of its debut, the iOS 12 is now running on over 75% of observed iOS devices (source: Mixpanel iOS 12 adoption in the first ten weeks), at a slightly faster pace as the adoption of iOS 11 when it got publicly available. On the other side, the fragmented Android ecosystem hasn’t got any better as Android users get OS updates in a different order depending on the devices they have. You can check them out at Android Distribution Dashboard.

iOS 12 Adoption

iOS 11 Adoption


Simply put, it’ll never be enough to test apps against a limited number of real devices, and it’s much more cost effective to rely on a mobile device cloud to cover those expensive flagships.

To have confidence in device compatibility, mobile developers are recommended to test on all iPhone 7, 8 and X variations on iOS 12 and 11. For sure, Android is a totally different story. But focusing on Samsung Galaxy series as well as country-specific popular devices based on your target markets should help you get a decent device coverage. To learn more about popular devices, please download the latest ‘The Must-Test Global Devices for Mobile Device Testing’ sheet.

Lingkai Shao

Marketing Manager