Password Keypad Lock Screen is a free Android app developed by Smart Mobile Lin, which allows users to protect their phones with a personalized lock screen. This app offers features such as disabling the HOME, BACK, and RECENT buttons, adding a custom photo to each password button, and setting a custom background from the gallery. The app also provides a colorful keyboard, options to show unread messages and missed calls, and the ability to add personal text to the lock screen.

One of the main advantages of Password Keypad Lock Screen is the ease with which users can set a password/passcode/pin to enhance their phone's security. Users can choose to set a four-digit password, and the app provides a random keyboard to make it more secure. The app also includes a quick launch camera from the lock screen and an option to choose an unlock animation.

Overall, Password Keypad Lock Screen is an excellent app for those who are looking for a more personalized and secure lock screen. The app's features are easy to use, and the colorful keyboard adds a nice touch to the overall design. However, users should note that this app does not include any subcategories and does not offer any additional features beyond those listed above.