The Samsung Galaxy A25, like other Samsung devices, typically offers features for app locking to enhance security and privacy. Here’s how you can lock apps on your Samsung Galaxy A25:

Using Secure Folder
Samsung devices have a built-in feature called Secure Folder, which can be used to lock apps and secure content.

1. *Set Up Secure Folder:*
- Go to *Settings* *Biometrics and Security* **Secure Folder**.
- Follow the on-screen instructions to set up Secure Folder using your Samsung account.
- Choose a lock type (PIN, pattern, or password).

2. *Add Apps to Secure Folder:*
- Open *Secure Folder* from the app drawer.
- Tap **Add apps**.
- Select the apps you want to lock and tap **Add**.

Using Third-Party Apps
If you prefer more customization options, you can use third-party app lock applications available on the Google Play Store. Some popular options include:

- *AppLock* by DoMobile Lab.
- **Norton App Lock**.
- **Smart AppLock**.

To use these apps:

1. *Download and Install:*
- Open the **Google Play Store**.
- Search for "App Lock".
- Choose an app (e.g., AppLock) and install it.

2. *Set Up App Lock:*
- Open the app you installed.
- Follow the setup instructions, which typically include setting a PIN, pattern, or password.
- Select the apps you want to lock.

These methods should help you secure apps on your Samsung Galaxy A25 effectively.