Aili is a subscription-based AI assistant designed to enhance work and personal interactions using advanced AI models, including GPT-4 and Claude 2. It operates across multiple platforms, offering seamless synchronization of chat history on various devices. Users can engage with document content and current web pages, generating tailored summaries and interactive conversations. Aili also features customizable chat experiences with different character selections, making interactions more engaging.

Additionally, Aili provides an 'unlimited web collections' feature, allowing users to bookmark an infinite number of web pages for quick access. Available on Android, iOS, and web clients, Aili supports logins via Apple and Google accounts. While the free version offers limited access to basic models, upgrading to a paid plan unlocks unlimited use of advanced features, making Aili a robust tool for both personal and professional use.