Hi! We are adding new features, improvements and fixes with every release and we would love to know about your experience with them. If you experience issues and something is not working for you, please reach out. We want to hear your feedback.
Coming in v4.4.0 (July 17) 
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Time limits now cover more durations, from 5 minutes up to 12 hours.
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Friendlier block screens that explain how blocking helps when you’re getting started.
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Newly installed apps are blocked right away — no need to restart your phone. (Bug fix)
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You will find a new screen that allows to redeem referral code manually.
- Send your friends your code (In Profile screen, at the bottom) and they can use this new screen to get Opal PRO for 30 days! If 5 of your friends use your code, you get 1 year of Opal PRO for yourself!
In next releases: 
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We will extend the “Share app” screen with list of rewards.
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Under-the-hood improvements for reliability and stability.
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and more.
We are constantly monitoring reviews and our support inbox and we investigte every report of the app not working as expected.
We hope you enjoy Opal! Feel free to send me DM if you have any question regarding Opal for Android.
With wish of good focus,
Roman 