Choosing the best trading app in India can be a subjective decision as it often depends on your specific needs and preferences. However, I can highlight some of the popular and highly-rated trading apps that you can consider:

• Zerodha - Zerodha is one of the largest and most popular discount brokers in India. Their app, "Kite," is highly regarded for its user-friendly interface, comprehensive features, and low brokerage charges.
• Upstox - Upstox is another famous discount broker, offering a user-friendly mobile trading app with a range of features, charts, and technical analysis tools. They are known for their competitive pricing.
• Angel Broking - Angel Broking's mobile app is known for its robust research tools, live market data, and educational resources. It's a good choice for both beginners and experienced traders.
• ICICI Direct - ICICI Direct's mobile app offers a seamless trading experience and provides access to various investment options, including stocks, mutual funds, and more. They are known for their customer service.
• 5paisa - 5paisa is a budget-friendly trading app with competitive brokerage rates and a user-friendly interface. They offer a wide range of trading and investment products.
• Sharekhan - Sharekhan is a full-service broker with a user-friendly mobile app that provides in-depth market research and trading features. They are known for their personalized services.
• Kotak Securities - Kotak Securities offers a feature-rich best mobile trading app with a variety of research tools and investment options. It's a trusted name in the industry.

While choosing the best trading app in India, consider factors such as:- lowest brokerage charges, user interface, research tools, customer support, and the range of financial instruments available. It's also essential to research and read user reviews to get an idea of the real user experience with each app.

Ultimately, the best trading app for you will depend on your specific trading preferences and objectives. Make sure to conduct your research and perhaps try out a few apps with demo accounts to see which one suits you best.

Please note that the financial markets involve risks, and it's essential to have a good understanding of trading and investing before getting started. Consider seeking advice from the best stock advisor or conducting thorough research to make informed decisions.