I am not a lawyer, but I can offer some general information that might help guide your decision. It's crucial to consult with a legal professional for advice tailored to your specific situation.
When you are on OPT (Optional Practical Training), you are allowed to work for an employer in your field of study, or you can be self-employed and start your own business. However, there are some considerations to keep in mind:
1. **Business License:** While it may take some time to obtain a business license, it's generally advisable to comply with local regulations. Operating without the required licenses could lead to legal issues down the line.
2. **USCIS Compliance:** USCIS (U.S. Citizenship and Immigration Services) expects you to engage in employment directly related to your field of study during your OPT. Starting your own business is allowed, but it should be in your field of study, and you should be able to demonstrate this if asked.
3. **Timing:** If you decide to start working on your app while waiting for the business license, it might be wise to keep detailed records of your activities. This can help you demonstrate to USCIS that you are engaged in work directly related to your field of study.
4. **Consult an Immigration Attorney:** To get accurate and specific advice for your situation, it's highly recommended to consult with an immigration attorney who can provide guidance based on the latest regulations and any potential changes.
Remember, the information provided here is not legal advice, and it's crucial to consult with a professional who can assess your situation comprehensively. They can guide you on the best course of action to remain in compliance with immigration regulations.