Guides
Guides: Video, Screenshot and Listing Specs for Apps and Software
Each guide reads a platform's own pages on the day it was written, quotes them with links, and says where its own numbers and advice come in.
App stores
- App Store Preview Video Requirements: Complete 2026 Guide
Apple's sizes, length, frame rate and encoding rules for app previews, and what a preview may show. - App Store Screenshot Sizes: 2026 Guide to Every iPhone, iPad and Mac Size
Which screenshot sizes Apple requires, which it scales down from, and how many you can upload. - App Store Custom Product Pages: 2026 Guide to Previews, Links and Keywords
How custom product pages work, what can differ from the default page, and how people reach them. - App Store In-App Events: 2026 Guide to Event Media, Metadata and Review
The event card and details page media, the text limits, and how events are submitted for review. - Google Play Preview Video and Feature Graphic Requirements: 2026 Guide
Google Play's rules for the preview video and the 1024 x 500 feature graphic.
Marketplaces
- Shopify App Store Listing Video and Images: 2026 Requirements Guide
Shopify's requirements and advice for listing media, video and screenshots. - Atlassian Marketplace Listing Requirements: 2026 Guide to Images and Video
Every image size, text limit and video rule for an Atlassian Marketplace listing, and where Atlassian's pages disagree.
Video ads
- Meta Video Ad Specs: 2026 Guide to Facebook and Instagram Feed, Stories and Reels
Ratio, size, length and file limits for every main Facebook and Instagram placement, with the safe zone in pixels. - TikTok Ad Specs and Safe Zones: 2026 Guide
Sizes, length and file limits for TikTok In-Feed ads, with the safe zone measured from TikTok's own files.
Websites
- Website Hero Video Size, Format and Autoplay: 2026 Guide
How to size, encode and embed a looping video at the top of a page so it plays on every phone.
Free tool
- App Store preview checker
Choose your preview file and see, line by line, whether it meets Apple's technical requirements. The file stays on your device.