How do application downloads influence App Store rankings? Readdle, the developer of Calendars 5 and Scanner Pro, has an answer: More than 3,500 downloads a day "of a 4.5 star ranked app" cracks the App Store's top 10 list, Readdle's Denys Zhadanov says. A bias for the new and app "inertia" also plays a role. "That's why it's important to reach the highest rank possible during the first few days. Because it'll be harder [to climb] later," Zhadanov notes.