What's the most common asset rejection cause?

Icons or graphics that include an alpha channel (transparent background), and screenshots that don't match the store's exact required pixel values. These account for the majority, so re-verify both right before submitting.

Do I really need iPad / tablet screenshots?

Only if your app supports those devices. The App Store requires one 13-inch iPad set when you support iPad; Google Play tablet screenshots are optional but improve visibility in tablet search when included.

Will this checklist alone get me through review?

It sharply reduces asset-spec rejections, but review also covers functionality, privacy, and policy compliance. This is the 'assets' final pass; the reasoning behind each spec lives in the icon and screenshot guides.

Pre-Launch Asset Checklist for iOS & Android

By Nomadic Jeikei · Updated July 24, 2026

A large share of review rejections come from assets, not code. A single alpha channel or one off-by-a-pixel screenshot can block your upload. This is the final checklist to run right before you hit submit. If you want the reasoning behind any item, pair it with the icon, screenshot, and licensing guides.

1. App icon

iOS: 1024×1024px PNG, no alpha channel, opaque background
Android store icon: 512×512px, 32-bit PNG, under 1024 KB
Android adaptive icon: logo sits inside the 72×72dp safe zone
Corners left un-rounded (the system masks them)
Shape legible on both light and dark backgrounds

2. Screenshots

Store	Baseline size	Count
App Store · iPhone 6.9-inch	1320×2868	1–10
App Store · iPad 13-inch	2064×2752	If iPad supported
Google Play · phone	1080×1920 recommended	2–8

Required screenshots (portrait)

App Store: match the exact pixel values (off by one pixel = rejected)
Google Play: each side 320–3840px, aspect ratio 16:9–9:16
Format: PNG or JPEG (24-bit PNG for Google Play)
Confirm your core message lands in the first two or three frames

3. Extra graphics & formats

Google Play feature graphic: 1024×500, JPEG or 24-bit PNG, no alpha (required to publish)
Color space: standardize on sRGB (P3 is also allowed for icons)
Alpha channel: confirm it's removed from icons, feature graphic, and screenshots
File size: check you're under each store's limit

4. Licensing & final pass

Check the license of every icon used — MIT/ISC need a source notice, CC BY needs visible credit
Confirm you hold commercial rights to any third-party fonts and images
Review all assets at real device resolution one last time
Before submitting, open each file at 100% to check for clipping, fringing, and typos

The two perennial rejection causes are 'contains an alpha channel' and 'wrong pixel size.' Re-checking just those two right before submission dramatically cuts the time lost to re-review.

Most of these specs are met automatically when you export a single source set to each store size in App Ready's STUDIO. Once your icons and screenshots are ready, run down this list top to bottom and submit.

Frequently asked questions

What's the most common asset rejection cause?: Icons or graphics that include an alpha channel (transparent background), and screenshots that don't match the store's exact required pixel values. These account for the majority, so re-verify both right before submitting.
Do I really need iPad / tablet screenshots?: Only if your app supports those devices. The App Store requires one 13-inch iPad set when you support iPad; Google Play tablet screenshots are optional but improve visibility in tablet search when included.
Will this checklist alone get me through review?: It sharply reduces asset-spec rejections, but review also covers functionality, privacy, and policy compliance. This is the 'assets' final pass; the reasoning behind each spec lives in the icon and screenshot guides.