The short
answers.
If something here isn't covered, the contact page reaches a person.
Is Mockstack really free?
Yes, every feature. The site will be funded by display ads, so exports stay clean: no watermark and no attribution.
Do you upload my screenshot anywhere?
No. Work autosaves locally so a refresh doesn’t lose it.
What sizes does it export?
Single PNG at the current canvas size, or "All sizes", a ZIP with the same design rendered at iPhone 6.9", 6.5", iPad 13", Android phone, Android phone tall, and Android tablet. That's the full required set for both stores.
Do you have an iPhone 16 Pro frame?
Yes, plus iPhone (notch), iPad 13", Android (Pixel-style), and Android tablet. Mockstack picks the right one from your screenshot's shape and tells you which it thinks fits.
Can I use the exports commercially?
Yes. Anything you make in Mockstack is yours to use on the App Store, Play Store, your website, paid ads, anywhere. We don't claim rights to your screenshots or compositions.
Why the ads?
Because the alternative is a subscription and we'd rather Mockstack stay free. The ads live in fixed slots: header, sidebar, footer, and one while your export renders. They never appear in your exported screenshots.
Make
the first one.
Sixty seconds and you'll have a screenshot you're proud to put on the store.