Sampled from 4 of Y!mobile eSIMかんたん開通's App Store screenshots — background, accent and theme, measured by LaunchShots (not something Apple publishes).
#FC0424 bg
#FC2742
#F48404 accent
#FFFFFF text
【主な機能】 ・開通準備チェック ・プロファイルダウンロード ・APN設定 ・開通チェック 【本アプリで開通いただけるお客さま】 ・ワイモバイルオンラインストアでeSIMをお申し込みいただいたお客さま 【ご注意】 ・お申し込みはウェブページから行ってください。 https://www.ymobile.jp/store/ ・eSIM開通に必要なプロファイルの再発行はできません。
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 7 screenshots above are Y!mobile eSIMかんたん開通's answers to those questions — they're public, they're real, and they made it through Apple's review.
What the numbers say: Y!mobile eSIMかんたん開通 runs a dark set with one background colour (#FC0424) 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, #F48404, 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 Utilities apps approach the same problem? Browse more Utilities apps in the showcase.
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 →Closest background + accent colours among the listings we've analysed — useful when you want to see the same palette handled by a different team.