App Name: Call Blocker - Block Numbers

Features:

• Call Blocking: The app effectively blocks unwanted calls and SMS from specific numbers and even blocks entire area codes if desired.
• Whitelist: Users can create a whitelist of numbers that are allowed to make calls and send SMS, ensuring that important contacts are never blocked.
• Automatic Blocking: Call Blocker can automatically block calls and SMS from hidden numbers or those not in the user's contact list.
• Backup and Restore: Users can easily backup their blocked numbers list and restore it later if needed.
• Private Mode: This handy feature enables the app to block calls and SMS silently, without notifications appearing on the user's screen.

Usability:

The app's interface is intuitive and user-friendly. Navigating through different options and settings is straightforward, making it easy for users to customize their call blocking preferences. The app's main screen displays recent blocked calls and messages, allowing users to review and take action if necessary. Overall, the app is simple to use, even for those who may not be tech-savvy.

Design:

Call Blocker - Block Numbers features a clean and modern design. The color schemes and layout are pleasing to the eye, creating a pleasant user experience. The app's design is minimalistic yet effective, ensuring that users can focus on the essential features without any distractions.

Pros:

• Effectively blocks unwanted calls and SMS from specific numbers.
• Whitelist functionality allows important contacts to bypass call blocking.
• Automatic blocking of hidden numbers and those not in the contact list.
• Backup and restore feature provides peace of mind.
• Private mode effectively blocks calls and SMS without disturbance.

Cons:

• Some users have reported occasional false positives, where legitimate calls or messages get blocked.
• The app lacks advanced customization options for call blocking rules.
• It may consume a moderate amount of battery in the background if continuously active.

In conclusion, Call Blocker - Block Numbers is a highly efficient and user-friendly app that effectively blocks unwanted calls and SMS. Its additional features, such as automatic blocking and the ability to create a whitelist, further enhance its usability. While a few minor limitations exist, the app's overall performance and design make it a worthy choice for anyone seeking to avoid unnecessary interruptions.