The Best Video Format and Resolution for App Store Previews
App Store Connect and Google Play both have specific technical requirements for preview video uploads. Here's what actually gets accepted.
Try Mockly FreeCodec and container
H.264-encoded MP4 is the safest, most widely accepted format for both stores — exactly what Mockly's export pipeline produces by default, so there's no separate conversion step.
Resolution choice
1080p is more than sufficient for how preview videos actually render in store listings. 4K is worth choosing only if you plan to reuse the same export somewhere it will display larger, like a website.
Frame rate and length
Mockly renders at a steady 30 FPS, which reads smoothly at typical preview video lengths of 10-30 seconds without unnecessary file bloat from a higher frame rate.
Frequently asked questions
Yes, Mockly exports H.264 MP4 by default, which is directly compatible with both App Store Connect and the Google Play Console without any conversion.
Both stores have file size limits well above a typical short mockup video export, so 4K is generally safe, though 1080p keeps the file smaller if size matters for your workflow.
Usually not — Mockly's export is already optimized for reasonable file size at both 1080p and 4K without extra compression steps.