Login to your Cex.io account and click Profile
Then select API Keys from the Account Settings
Click on Generate key button
After clicking Generate, it will show your Key and Secret. Please note that Secret will be hidden after you activate it
Click on Activate button
Action needed: Click the link in the email to activate api key
After the message - Your API key has beed activated you can add them in Coin Stats
Now go to Coin Stats app Altfolio tab, scroll far to the right and click Add new portfolio by Selecting Exchange (API KEYS).
Click QR and scan the QR code presented by Cex.io or copy/past your KEY and Secret Manually.
After clicking Add you will see your Cex.io portfolio synced with the Coin Stats app.