What the code does
According to Opal's help centre, an invite code lets a new user try Opal Pro free for one month. The person who shared the code gets a free month as well; 5 referrals bring a year, and 50 bring a lifetime subscription.
Restrictions (missing from this page before)
- The free month is only for people who have just signed up.
- If an account is more than two weeks old, a referral will not count for it.
- Referrals work on iOS alone; the Android and Mac apps have no support for them. On Android, Opal costs nothing in any case.
Applying it
- Download Opal using the link on this page.
- Set up a new account.
- Where an invite code is requested, type PZW4F.
- Confirm in the app that the Pro trial is switched on.
About Opal
It is an app for staying focused and cutting screen time: during windows you choose, it shuts off apps that distract you. On the App Store it scores 4.8, based on more than 150,000 ratings.
Opal controls these terms and can change them. After the trial the subscription may renew on its own, so read the terms in the app beforehand.




