By creating an account, you'll be able to save and access your content easily.
Tap on the "My Content" tab
Add the email address you want to create your account with
An email will be sent to the email address
Go to your mailbox
Open the email
Click on the magic link "Sign in to Photoroom"
You'll see a message confirming you're all set
If you are a Pro user, note that your Pro subscription is related to your Apple ID or to your Google Play account, not to your Photoroom's account. Your Photoroom's account enables you to save and easily access your content from different devices.