The smartphone market, some argue, really took off after Apple introduced the first app store to make its iPhones more useful. Now a new startup hopes that the same might be the case for the fledgling world of robots: RobotAppStore, an online marketplace for apps for robots, has raised $250,000 from Grishin Robotics, the Robot-focused investment vehicle of Mail.ru CEO Dmitry Grishin, which earlier this year opened for business with a $25 million fund to drive the industry.