Soulver’s reasoning for the App Store version not having wolfram integration was
> Apple does not allow App Store apps to request API keys from users ("additional functionality must be unlocked via an in-app purchase" to quote App Review).
I found this app in the App Store which provides LLMs from OpenAI, anthropic, etc. with an API key. Functionality is locked away by API keys. And the app has no IAPs
I remember an older version of Soulver (Mac; App Store) having wolfram integration. Maybe it could be brought to the iPhone app?