We render the same pages both in the app and on the Locatify Builder but since the default page is displayed natively in the app (not using an HTML template), there are some differences. The aspect ratios of devices vary, so the preview may not fully represent how it will appear on the phone. To see the exact appearance, it's recommended to publish a test version and check it directly on your phone.
Photos will maintain their aspect ratio when displayed, with the width being fixed and the height adjusting dynamically based on the image's aspect ratio.