App Store & Google Play Listing Assets: Complete Guide 日本語ガイド
日本語の app store google play assets guide ガイド: A practical map of screenshots, icons, and store graphics for iOS and Android—organized around a local browser workflow.
Publishing a mobile app means preparing more than one image. Apple and Google each expect screenshots, icons, and—in Google’s case—a feature graphic. The details differ enough that a single generic resize tool is not enough.
This guide maps the assets, shows where the platforms disagree, and points to focused articles plus DevCove App Store Assets tools that run locally in your browser.
What you need before upload
| Asset | App Store | Google Play |
|---|---|---|
| Phone screenshots | Required (device-class sizes) | At least 2; flexible pixel range |
| Tablet screenshots | Required if the app runs on iPad | Recommended for large screens |
| App icon | 1024×1024 marketing icon | 512×512 high-res icon |
| Feature graphic | Not used | Required 1024×500 banner |
| Preview video | Optional App Preview | Optional promo video |
Do not copy the same PNG to both stores without checking format, transparency, and aspect rules. See the platform comparison article for the policy differences that matter at export time.
Recommended local workflow
DevCove groups three tools in workflow order:
- Screenshot Composer — Turn raw captures into marketing screenshots with headlines, backgrounds, and optional device frames. Use when the UI still needs presentation work.
- Market Image Resizer — Crop finished artwork to official presets and export a zip with a upload checklist. Use when the design is done and you only need exact sizes.
- App Icon Set Generator — Export preset PNG icon sizes from an existing logo. Use after brand artwork exists; it does not design a new logo.
If you are starting from phone captures, read How to Create App Store Screenshots from Phone Captures first.
Deep dives by topic
- Apple screenshot sizes → App Store Screenshot Size Checklist
- iPad-only rules → iPad App Store Screenshot Requirements
- Google Play banner → Google Play Feature Graphic Size
- Icon dimensions → iOS & Android App Icon Sizes Guide
- Marketing copy on screenshots → Screenshot Text & Marketing Rules
- Without Photoshop → Make App Store Screenshots Without Photoshop
Common mistakes to catch early
- Exporting Google Play PNGs with transparency — use an opaque background.
- Treating the feature graphic as a cropped phone screenshot — it is a separate 2:1 banner.
- Upscaling a small logo to 1024×1024 and expecting sharp results — start from the highest-resolution source available.
- Using one iPhone marketing layout for iPad — proportions and safe areas differ.
- Adding “#1 app” or “Download now” text that violates Google Play graphic policies.
Upload checklist (short)
- Screenshots show real in-app UI, not mock-only flows.
- First two or three frames communicate the core value quickly.
- Icons are square PNGs without baked-in rounded corners (iOS applies the mask).
- Feature graphic keeps critical content near the center safe zone.
- File names and dimensions match the console slot you are uploading to.
All DevCove image tools process files locally. Verify the latest rules in App Store Connect and Google Play Console before you submit.