Login to you IDEX account and click New Wallet on the top.
Generate a password and click Yes - Create Wallet.
Download Keystore File and click on Get My Private Key.
Copy your Private Key and save it in a safe place first, then click Unlock Wallet.
Upload your Keystore File/enter password or copy/paste the Private Key in the field.
Now go to CoinStats app Portfolio tab, swipe far to the right and click Connect Exchange.
Select IDEX from the list and paste your Wallet Address.
After clicking Submit you will see your IDEX portfolio synced with the CoinStats app
Refer to support in case of further questions. Hope you'll enjoy!