Free, open-source App Store screenshot editor whose AI generation runs in the browser on your own Gemini, Qwen, OpenAI, Anthropic or xAI key.
Shotluma turns a short app description and a few raw captures into a full set of App Store screenshots, placing them in device frames and keeping every headline, shape and gradient as an editable layer. AI generation is bring-your-own-key: Google, Qwen, OpenAI, Anthropic and xAI models are called directly from the browser with your key, which is stored locally and sent only to the provider you pick. Projects live in the browser's IndexedDB, exports are App Store-sized PNGs in a ZIP, and the editor is free and MIT-licensed with no paid tier.