To check your current downloads for iOS apps you will need to check the stats using your Apple Developer Account. Here are the steps:

1. Go to appstoreconnect.apple.com and login with your account credentials. 
2. Click Sales and Trends
3. From here you can filter by app and adjust the date range to see downloads for your app. Please note that by default it will just show you Downloads for your app, not the total number of times your app has been Updated.
4. To see update totals click Add Filters then select Transaction Type and then Updated.

Please note that if you don't have access to the Sales data your Account Holder for your Developer Account may have to change your access.