Apollo (formerly AIDA)

Apollo is a multi-model chat app for iPhone, iPad, and Vision that was originally released on the App Store as AIDA. It gives you a single interface for talking to several leading AI engines, including models from OpenAI, Anthropic, and Google, so you can compare wording and reasoning without installing a separate app for each provider. The product ships with customizable prompts, saved responses, and 24/7 customer support, and is free to download with in-app purchases unlocking additional access. Because it is rebranded from AIDA, older reviews and pages still refer to it by its former name.