Chart position — tracked daily by LaunchShots
Screenshot style breakdown
Sampled from 6 of Syntex - Developer Toolkit's App Store screenshots — background, accent and theme, measured by LaunchShots (not something Apple publishes).
#040404 bg
#272727
#3CBCFC accent
#FFFFFF text
Reading the caption text from the screenshots in your browser…
Screenshots
iPad screenshots
Icon palette
About this app
Syntex is a clean, fast developer toolkit built for people who write code. Stop switching between browser tabs just to format a JSON response, generate a UUID, or convert a timestamp. Syntex puts 8 essential dev tools in one place — always offline, always instant. — TOOLS INCLUDED — { } JSON Formatter Paste any JSON and instantly format it with proper indentation. Validates structure and highlights errors so you know exactly what's wrong. b64 Base64 Encode plain text to Base64 or decode Base64 strings back to readable text. Great for working with APIs, tokens, and encoded payloads. uid UUID Generator Generate one or multiple UUIDs (v4) in lowercase or uppercase. Copy individually or copy all at once. ts Timestamp Converter Convert Unix timestamps to human-readable dates, or pick any date and get the Unix timestamp back. Shows current time live. Aa Text Case Transform text be…
App details
What you can learn from Syntex - Developer Toolkit
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 17 screenshots above are Syntex - Developer Toolkit's answers to those questions — they're public, they're real, and they made it through Apple's review.
What the numbers say: Syntex - Developer Toolkit runs a dark set with one background colour (#040404) 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, #3CBCFC, 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.