Chart position — tracked daily by LaunchShots
Screenshot style breakdown
Sampled from 5 of OB Wheels's App Store screenshots — background, accent and theme, measured by LaunchShots (not something Apple publishes).
#8CCCFC bg
#7BB3DD
#44647C accent
#111111 text
Screenshots
Icon palette
About this app
Does the world need another OB-wheel-due-date-calculator app? You bet! OB Wheels combines three things that clinicians need to derive all the dates necessary in pregnancy care, and no other app has this combination. It contains a calendar calculator to determine EDD (EDC) from LMP or from a sonogram report. The calendar calculator also provides gestational age (EGA) as of any date for a given EDD or LMP. Because the calculator works off the real calendar, it is accurate for leap years too. Then for all of you who miss your cardboard OB wheel, the app contains one which you can rotate, pinch and zoom, and generally play with just like a regular cardboard wheel. It's a little tricky to learn how to plant two fingers and rotate them rather than pinch-and-zoom to get rotation versus resizing. But the wheel works and it is accurate, especially so because you can zoom in to be sure…
App details
What you can learn from OB Wheels
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 OB Wheels's answers to those questions — they're public, they're real, and they made it through Apple's review.
What the numbers say: OB Wheels runs a mixed light-and-dark set where the background shifts from screenshot to screenshot (first shot #8CCCFC) — each image has to stand on its own, so the captions carry more of the story. The accent colour we picked up, #44647C, 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 Medical apps approach the same problem? Browse more Medical 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.