In general, we can download and install the Amazon Appstore app in order to instantly download games and mobile apps to our Android devices.
https://www.amazon.com/gp/help/customer/display.html?nodeId=201357440
But the Amazon Appstore for Android app is generally compatible with all Android devices that run Android version 4.1 or greater. It's a pity that your Android operating system is only V2.1. 
Download size < 0.12 MB. But also accurate enough, ad-free & free.
The minimalist app available on Play Store: https://goo.gl/ws42fN
Your 5-star is appreciated. Blog: https://okblackcafe.blogspot.com