You don't need to root to side-load (unless you're trying to side-load a system app).I'm thinking of rooting it and side-loading the app... just seems like a ridiculous pain PITA for an app that only sends and receives data
Apps that uses Google Play services will not work with BlackBerry 10 O/SThere are legitimate websites you can visit that will allow you to download the APKs from the Play Store. You can then side-load the APK to your device (only need to enable installation from unknown sources).
I had to use one of my earlier APKs from backups of my Galaxy S3. I use it on my ASUS MeMO Pad FHD LTE 10. I use it for all the stuff I use RemoteLink on my phone for: status of charging, mpg, mileage, locating the Volt. I love the app. Works great!