"WhatSumup" is a free Android app developed by Chuchosoft Corp. It offers chat summarization capabilities without ads, in-app purchases, or requiring any permissions. The app utilizes Language Models (AI) to generate summaries in various forms, including general, by participant, by topics, and possible responses for conversations. Users can customize the summary and response language settings based on their preferences, making it convenient for multilingual chats.

Additionally, the app provides statistics on message distribution among participants, the option to select specific messages for summaries, the ability to copy simulated responses, share summaries, and access a summary history. The app's Language Models are continuously updated on the servers, ensuring improved outcomes without the need for frequent app updates. While the free version allows up to 2 summaries per day, the PRO version offers a higher daily limit to enhance user experience.