Pff that's nothing. I could build a fake app, in less than 1 hour, for $100 and get about 5 million downloads in 1 day.

Step 1. Find some opensource app code

Step 2. Call it Pokemon Go 2!

Step 3. Upload it to Appstore & link it to dropbox

Step 4. Spend $100 on African "talent" to give fake 5 star reviews & positive comments in app store.

Step 5. Hit F5 repeatedly at Appstore to watch the download counter increase to 5 million in 24 hours.

Step 6. Profit ?!?!

Step 7. Post story in /r/nosleep because too much guilt fooling 5 Million people.