Chart position — tracked daily by LaunchShots
Screenshot style breakdown
Sampled from 6 of dev HTML Playground: ビューア&エディタ's App Store screenshots — background, accent and theme, measured by LaunchShots (not something Apple publishes).
#140C24 bg
#342E42
#1C6CD4 accent
#FFFFFF text
Screenshots
iPad screenshots
Icon palette
About this app
dev HTML Playgroundは、iPhoneだけでHTML/CSS/JavaScriptを「作る・動かす・見る」ための開発環境です。パソコンは必要ありません。 ■ こんな人におすすめ ・プログラミングを始めてみたいけど、パソコンを持っていない ・通勤・通学のスキマ時間にアプリ作りを楽しみたい ・AIにコードを書いてもらって、自分だけのツールを作りたい ・子どもにプログラミングの楽しさを体験させたい ・AIに書かせたHTMLの資料やレポートをiPhoneでさっと確認したい ■ 主な機能 【コードエディタ】 シンタックスハイライト付きのエディタで、HTML/CSS/JavaScriptを快適に編集。自動保存、ファイルの追加・名前変更・削除にも対応。コード編集の邪魔になる自動修正(スマート引用符など)は無効化済み。 【プレビュー】 書いたコードはワンタップで即実行。console.logの出力やエラーもアプリ内のコンソールに表示されるので、デバッグもiPhoneだけで完結します。 【AI連携】 ChatGPTやClaudeなどのAIに貼るだけの「環境説明プロンプト」を用意。AIが「何を作りましょうか?」と聞…
App details
What you can learn from dev HTML Playground: ビューア&エディタ
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 12 screenshots above are dev HTML Playground: ビューア&エディタ's answers to those questions — they're public, they're real, and they made it through Apple's review.
What the numbers say: dev HTML Playground: ビューア&エディタ runs a dark set with one background colour (#140C24) 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, #1C6CD4, 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.