My aim with this app was to provide a sleek macOS ChatGPT/GPT-4 experience for users who couldn't be bothered to sign up for Open AI developer account. Of course, along the way I considered that there is a sizeable audience who would prefer to avoid any third-party proxy and use their keys directly. Unfortunately, as mentioned by DerJacques in this thread, it is not certain that allowing this would pass Apple reviews. However, we could try? If I see enough interest in "bring your own keys" model, it could be possible to offer this version of the app outside the App Store. Would you be willing to pay ~$30 one-time purchase for such an app?