Thank you for reaching out to the Samsung community! We would like to inform that if you forgot the lock and mask app password then it cannot be recovered. To use the lock and mask app again you need to factory reset the device. Kindly remove the device account and take the data backup via smart switch PC suite and reset the device.
Be sure to hit ♡ when you find an answer that works for you. For Further assistance, you can get in touch with us via Live Chat option by following- http://livechat.support.samsung.com/Customer_new/IN. You can also connect us via Samsung Members web community by following mentioned url-https://community.samsungmembers.com/en_IN#/
