Chart position — tracked daily by LaunchShots
Screenshot style breakdown
Sampled from 5 of Knife Steel Composition Chart's App Store screenshots — background, accent and theme, measured by LaunchShots (not something Apple publishes).
#040404 bg
#272727
#542C14 accent
#FFFFFF text
Screenshots
Icon palette
About this app
Knife Steel Composition and name cross-reference database. Includes popular, high end and exotic alloys used in knife blades. Over 6500 alloy names, over 1000 compositions. Alloy names for 21 different international standards, proprietary names and their equivalents. Easy alloy composition comparison with bar graph in 3 modes: mass percentage, molar masses and atomic count per 1000 atoms. If you have suggestions for improvement, please contact me. Posting in the review that there's a room for improvement doesn't help me at all, I am not a designer, but a software engineer. Please report missing alloys, as in either post the alloy name, or contact me. Complaining in the review "I didn't find what I wanted" means very little. If you encounter any problems using the app, please contact me using email. Posting in the review you have a problem, won't give me enough information to fix it.…
App details
What you can learn from Knife Steel Composition Chart
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 5 screenshots above are Knife Steel Composition Chart's answers to those questions — they're public, they're real, and they made it through Apple's review.
What the numbers say: Knife Steel Composition Chart 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, #542C14, 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 Book apps approach the same problem? Browse more Book 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.