As the User Guide says, you must create a new class in your own Parse Dashboard on back{4}app and name it EXACTLY as “Monsters”, with capital M, otherwise the app will never show your monsters, no matter if you’ve placed the GPS coordinate nearby your location.
Also, we suggest you to grab latitude and longitude coordinate from this website: http://www.mapcoordinates.net/en

You must sign up for a free account on http://back4app.com in order to create a App on back{4}app, grab its App and Client Keys and paste them the Configs.swift file of this app.

back{4}app service offers the following FREE features for the STARTER pack:
• 1 GB Database Storage
• 5 GB File Storage
• 10 Requests/second
• 50 K Requests/month
• 1 Cloud Code Job

Check out its PRICING tables here: https://www.back4app.com/pricing/

Here you can find DOCS: http://docs.back4app.com/

Check this video out to see how to remove the code that shows AdMob banners: https://youtu.be/e-HQYnta2Jg
Keep in mind that you must repeat the shown steps for every .swift file that contains this line on the top:

import GoogleMobileAds