Apptune turns one screenshot design into every App Store and Google Play size, in every language your app speaks. Start from a template or a blank canvas with a snap grid, drop in your app's screens, add device frames and captions. AI translation reads each caption in context, keeps it inside its box and mirrors right-to-left languages. When it's ready, publish straight to App Store Connect (product page A/B tests included) or download a ZIP. Free plan, no watermark, no card.