Samsung's Good Lock app, which was available exclusively through Samsung's Galaxy Store, is now available through Google's Play Store.
However, the Good Lock app is listed on the Google Play Store with the "Early Access" tag, so it's best to avoid downloading it from the Play Store on your primary phone.
In related news, Samsung also released the Good Lock module One Hand Operation+ on the Google Play Store, giving Samsung users an option to download it from the Galaxy Store or the Play Store. You can head to the links below to download them.
Download: Good Lock, One Hand Operation+