The Top Mobile App Development Companies in December, According to DesignRush Share Article DesignRush released the December rankings of the top mobile app developers selected based on the companies' expertise and portfolios relative to the cost of services. The ranking list recognizes app development companies worldwide and includes iOS, Android and Windows app specialists. NEW YORK (PRWEB) December 24, 2020 In the first half of 2020, iOS and Android’s combined app revenue grew by over 23% in comparison to the previous year. Businesses have increased investment to capitalize on this fast-growing market opportunity. Much of that investment has gone to app builders such as beezer.com and appypie.com as businesses looked for quicker and more affordable solutions due to COVID-induced market volatility.