I only knew what the ad did because it came on at a time where I couldn't skip the ad. Just seems like an app you wouldn't have on your phone and when you need it you don't have access to internet.
You only need a GPS signal to use our app. Your phone will likely have a GPS signal even when you don't have network reception | The map on the screen may not load but if you press the 'current location' button your 3 word address will update |https://twitter.com/what3words/status/1138451714447675392?s=21 …
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Did you know you can still find your 3 word address and even #navigate somewhere while offline? 
Wherever you are in the world, make sure you’re using what3words. #TuesdayThoughts pic.twitter.com/h5AFxNOjsz
Wherever you are in the world, make sure you’re using what3words. 