Screenshot style breakdown
Sampled from 4 of スマホでFlutter's App Store screenshots — background, accent and theme, measured by LaunchShots (not something Apple publishes).
#FCFCFC bg
#DDDDDD
#3C4CAC accent
#111111 text
Screenshots
Icon palette
About this app
シンプルな操作性でスマートフォンでFlutterのWidgetを体験できるアプリ Flutterの基礎を解説したガイドコンテンツ FlutterウィジェットでUIを組めるエディター機能
App details
What you can learn from スマホでFlutter
Every shipping app on the App Store has gone through the same decisions you're working through right now: which screenshot goes first, what caption sits over it, which device frame to show, what color the background should be. The 4 screenshots above are スマホでFlutter's answers to those questions — they're public, they're real, and they made it through Apple's review.
What the numbers say: スマホでFlutter runs a light set with one background colour (#FCFCFC) carried across every screenshot — the listing reads as a single poster when the shots sit side by side in search results. The accent colour we picked up, #3C4CAC, is the one to reuse for badges, arrows and highlighted words if you borrow this look. Hit Use this style to open the editor with these exact colours and drop your own screenshot in.
Notice the first screenshot in particular. It's the one users see in search results and on the product page, and it's where most apps spend their best caption and tightest design. Look at the proportion of background to phone, where the text sits, what one thing the image is trying to communicate.
Want to see how other Developer Tools apps approach the same problem? Browse more Developer Tools apps in the showcase.
Take what works into your own screenshots
Open LaunchShots and design your App Store & Google Play screenshots — pick a device frame, drop captions, ship in minutes. Free, in your browser.
Open the screenshot editor →Apps with a similar look
Closest background + accent colours among the listings we've analysed — useful when you want to see the same palette handled by a different team.