OpenDota is described as 'volunteer-developed, open source platform providing Dota 2 data. It provides a web interface for casual users to browse through the collected data, as well as an API to allow developers to build their own applications with it' and is an app in the Development category. There are three alternatives to OpenDota for Online / Web-based, Android Tablet, iPad and iPhone. The best alternative is Dotabuff, which is free. Other great apps like OpenDota are Tracker.GG (Free) and Plink.gg (Free).