It sounds like your business, Sky Computer, offers a range of services, including working with the government NSDL agency, providing assistance with daily use documents, and offering computer hardware and software sales and services. Additionally, you also provide investment help. All of these activities are authorized by your business.

To make sure your app is fully aligned with your services and communicates clearly with users, here are a few things to consider for your app:

Service Transparency: Clearly mention in your app the different services you offer, such as government document solutions, hardware/software sales and services, and investment assistance. Make it easy for users to understand what each service entails.

Contact Information: Since you provide contact details via call and WhatsApp, ensure that these contact methods are easily accessible within your app. For example, include buttons or links for users to directly reach your team via WhatsApp or phone calls.

User Instructions: Provide simple instructions or FAQs on how users can get in touch with your team for support with daily-use documents, tech services, or investment guidance. This will ensure that users know how to navigate your app and get the help they need.

Legal Compliance: Since you mention authorized work, it's important to make sure that your app complies with all relevant legal and regulatory guidelines, especially since you are working with government-related services.

Data Security: If you are collecting any personal or sensitive data, like for investment services or government-related work, ensure that your app follows best practices for data protection, such as secure data storage and privacy policies.