Efficient Android App for Printing Certificates

I'm looking to develop a simple yet efficient Android application for printing lab certificates on card size using my printer. The application should be user-friendly and encompass essential features for seamless operation.

Key Features:
- Certificate Template Selection: The app should provide various templates for different types of certificates.
- Database of Certificate Entries: A built-in database to keep track of all certificate entries, making it easy to print duplicates or track issued certificates.
-Printing Preview: A feature that allows users to preview the print before actually printing, ensuring accuracy and saving resources.

User Interaction:
The application should be designed for manual data entry within the app. Users should be able to input data for the certificates directly.

Ideal Skills and Experience:
- Proficiency in Android application development.
- Experience with database integration in mobile apps.
- Understanding of designing user-friendly interfaces.

A developer with a strong background in creating similar applications would be highly beneficial.