Patter — Support

Patter is a serverless, AI-powered language-learning iPhone app. Chat with AI personas who stay in character, get real-time grammar corrections, and learn at your CEFR level — all without an account or a developer backend. Everything runs on your device using your own API key.

Requirements

• iPhone with iOS 17 or later
• A supported LLM provider account and API key (Google AI Studio, OpenAI, or Anthropic)
• Designed for iPhone; iPad may run the app in compatibility mode depending on your device

Getting help

1. Check that you are on the latest iOS and the latest app version from the App Store.
2. If something still looks wrong, open a GitHub issue. In the title or description, mention what you were doing when the issue occurred (device model and iOS version help too).

If issues are disabled on the repository, use the Support contact method listed on the app's App Store product page.

API key issues

Patter is serverless — your API key is stored in the iOS Keychain and used directly to call your chosen LLM provider's API from your device. If you're having trouble with API access:

• Verify your API key is valid by testing it with the provider's own tools.
• Check that your provider account has sufficient balance or free-tier quota.
• Ensure you're using a supported provider (Google AI Studio, OpenAI, or Anthropic).

Privacy

Patter is serverless — no data leaves your device except the messages you send to your LLM provider. Conversations are stored locally via SwiftData; API keys are stored exclusively in the iOS Keychain. For full details, see the Privacy Policy.

Trademark

Patter is developed by vilaverdeapps. App Store is a trademark of Apple Inc.

This page is maintained for App Store Support URL compliance and user help. Repository: vilaverdeapps/patter.