Calling Google Places/Nearby API from inside an iOS App

I'm trying to call the Google Places API to return a list of restaurants near me. When I call this from a browser it works fine. However, when I call this from inside an iOS App I built using Ionic Framework, it fails with a data NULL, status 0 error.

I researched quite a bit, figured out this was a CORS issue. I looked up Google documentation on how to issue GET requests for iOS App. I used my app's bundle id to create a key and client ID for my app. Using the steps here https://developers.google.com/accounts/docs/OAuth2InstalledApp#overview, I obtained an access_token, which I used as a query parameter just like the docs mentioned. Nothing works. What is going wrong?

URL that works on browser: https://maps.googleapis.com/maps/api/place/nearbysearch/json?key=MyServerApplicationsKey&location=33.85463,-84.35870&rankby=distance&types=restaurant

URL that fails from IOS App: https://maps.googleapis.com/maps/api/place/nearbysearch/json?key=MyiOSApplicationsKey&location=33.85463,-84.35870&rankby=distance&types=restaurant&access_token=MyToken

@plexer I use the server key to call the URL from the browser. That works, as mentioned. From the App if I use this key, I get the following error: {"data":null,"status":0,"config":{"method":"GET","transformRequest":[null],"transformResponse":[null],"url":"sameUrlThatWorksOnBrowser","headers":{"Accept":"application/json, text/plain, /"}},"statusText":""}