Message Counter - SMS Counter is a free and open-source SMS management tool developed by AE App Labs. This Android app is designed to help users keep track of their SMS usage and provides a range of features to manage SMS messages effectively.

The app displays the number of SMS sent each day and per cycle, as well as the number of SMS messages in the inbox, sent, and total. It also allows users to create a custom ignore list of numbers, and shows a chart of top message senders. Users can receive notifications when the SMS limit per cycle is reached. The app's material design interface is user-friendly and easy to navigate.

In addition to these features, Message Counter - SMS Counter also has a sorted list of received messages and home screen widgets. The app is completely ad-free and is supported by In-App Donations. However, it should be noted that the core functionality to access the SMS database had to be removed to comply with Google Play Policies.

Overall, Message Counter - SMS Counter is a useful tool for managing SMS messages, especially for those who need to keep track of their SMS usage. As an open-source project, it is constantly being updated and improved, although updates may not be frequent due to the developer working on it in his free time.