Do I need Ionic’s Geolocation Plugin?

Most likely not. As described in the Cordova documentation and Ionic documentation, the plugin is for devices that don’t already provide an implementation. The vast majority of modern smartphones natively support the WebView Geolocation API. Also, cellphone enabled tablets typically have a GPS. However, WiFi only tablets may be limited to using non-GPS, WiFi-based geolocation, but the Geolocation API will still work although it will be less accurate.

Skipping the plugin simplifies installation and implementation. You don’t have to install it and that eliminates any possible conflicts and provides a minor reduction in application size. You also don’t have to import the plugin into your application components and that simplifies your code. You can simply use navigator.geolocation like you would in any regular JavaScript app:

watchId = navigator.geolocation.watchPosition(success[, error[, options]])

Sample application: