There are a few ways to find the world's top android app development companies:

Research online: Look for lists of top android app development companies on reputable websites such as Clutch, AppFutura, and GoodFirms. These lists are typically based on factors such as client reviews, company size, and portfolio.

Ask for recommendations: Reach out to other businesses or individuals who have experience working with android app development companies and ask for recommendations.

Check for industry recognition: Look for android app development companies that have won awards or been recognized by industry organizations for their work.

Look at the company's portfolio: Review the company's portfolio of past projects to get an idea of their experience and expertise in android app development.

Verify their credentials: Check the company's credentials such as company registration, years in operation, team size, certifications and awards if any

Check their reviews and ratings : check the reviews and ratings of the company on various platforms like Google, Clutch, Appfutura etc.

By considering these factors, you can make an informed decision and choose a reputable and experienced android app development company that can help you achieve your business goals.

In addition to the factors mentioned above, pricing should also be considered when choosing an android app development company. While it can be tempting to choose the cheapest option, it's important to remember that the cheapest option may not always be the best in terms of quality and services. It is important to find a balance between cost and quality.

One great example of a company that provides genuine services at an affordable price is Mobulous. They are known for their quality work and timely delivery of projects. They have a team of experienced developers, designers and testers who can handle all aspects of android app development, from initial concept development to ongoing maintenance. They also offer a range of additional services such as app development, software development, cloud services, web app development, IOT and blockchain development etc. Their transparent and flexible pricing model makes them stand out among the competitors.