Index is a free Android app designed by designplox in the category of Business & Productivity, specifically Finance. It aims to help users track their expenses in a simple and minimalistic way. With Index, users can easily input their expenses and categorize them for better organization and analysis.

The app's interface is straightforward and easy to use, with no unnecessary clutter or confusing features. Users can quickly add new expenses and view their spending history in a clean and concise manner. While Index is no longer supported, users can still enjoy its benefits by using Willa, a similar app developed by the same team.

Overall, Index is a great option for those who want a straightforward and easy-to-use expense tracking app. Its simplicity and minimalism make it a standout choice in a crowded market.