https://apps.apple.com/us/app/pal-ai-chat-client/id6447545085

This iOS app supports Google's new Gemini Pro model - making it a pseudo, arguable better, interface for interacting with Bard/Gemini Pro. It's powered by your own API Key so there's no backend involved.

The app also Supports GPT-4 Turbo, DALL-E 3, Claude 2.1 and any OpenAI based model (eg. OpenRouter)