Guides
What it takes to build a mockup properly
Store specs, how compositing works, and export resolution, each traced back to a public document or to how the tool actually behaves.
7 guides
- App Store and Play Store screenshot specsApp Store and Google Play screenshot specs from the official docs, with one thing stated up front: this editor cannot output Apple's fixed device sizes.Updated 25 September 2026
- Why your mockup looks flat, and what you can actually adjustA screenshot dropped into a frame reads as printed paper. Here is what this editor actually draws, what you can adjust, and what it does not support.Updated 25 September 2026
- Export resolution, how far you can push the scaleWhat the export scale multiplies, why a 4x export cannot restore detail from a large upload, and when Safari's canvas area limit locks a scale.Updated 25 September 2026
- Where does my screenshot go, and is it watermarked?Your screenshot stays inside the browser. No server route accepts a file and no mark is drawn on the export. The cost is that a refresh drops the image.Updated 27 September 2026
- Preparing a screenshot for uploadAccepted formats, the size cap, and the 2000 pixel long edge rule, checked in the code, plus the order of the checks and where your image lands.Updated 27 August 2026
- Transparent background or flat background, what differsWhere the transparent and flat export paths split in the code, the limits per format, how it differs from the background setting, and when quality applies.Updated 26 August 2026
- Putting several devices in one imageHow to fit 3, 6, 9, or 12 phones into a single image, what the count and gap controls do, and why the margin between devices holds at 4 percent.Updated 26 August 2026