How much does it cost to develop app lock mobile apps

These days, smartphones serve as banks for storing critical documents, images, videos, personal information, and much more. They contain a great deal of private or professional data. Therefore, we should safeguard such important data from anyone attempting to access it or from data intruders.
To guarantee the highest level of security and privacy for their customers, smartphone manufacturers are incorporating technologies like voice-activated locks, fingerprint authentication, face locks, and passwords. However, the security of the app's or device's data remains a problem because the brands will continue to modify the features and functionalities.