![](https://9to5google.com/wp-content/uploads/sites/4/2019/04/google-wifirttscan-app.png?w=1440)
Android 9 Pie introduced support for indoor positioning by leveraging 802.11mc. Wi-Fi Round Trip Time (RTT) allows the system and apps to “measure the distance to nearby RTT-capable Wi-Fi access points.” Google this week published a “WifiRttScan App” for developers through the Play Store.
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