Screenshot style breakdown
Sampled from 6 of STL to STEP Assistant's App Store screenshots — background, accent and theme, measured by LaunchShots (not something Apple publishes).
#5CA4D4 bg
#5090BA
#04447C accent
#111111 text
- #5TL2STEP > =
Captions read from the screenshots (OCR, may contain small errors): 1 headline, 3 words on average (longest 3), mostly ALL CAPS.
Screenshots
Icon palette
About this app
STL to STEP Assistant is a focused local 3D model tool for converting mesh-based models into STEP files for CAD workflows. Open STL, STLB, GLB, 3MF, USDZ, OBJ, 3DM, FBX, DAE, PLY, 3DS, AMF, DRC, KMZ, MPD, WRL, and other model files, preview them in a clean 3D scene, choose a conversion quality mode, then export and save the current main model as a STEP file. You can also load and view STEP and STP files to inspect conversion results. Built for mesh-to-STEP work - Convert STL, including binary STLB, to STEP - Convert OBJ, GLB, GLTF, 3MF, 3DM (Rhino), FBX, DAE, PLY, USDZ, 3DS, AMF (additive manufacturing), DRC (Draco), KMZ (zipped 3D scene), MPD (multi-part LDraw), and WRL (VRML) model formats to STEP - Load and view STEP files to inspect conversion results - Export STEP with BRep reconstruction, useful for turning some engineering mesh models into easier-to-edit CAD surfaces - Preview …
App details
What you can learn from STL to STEP Assistant
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 6 screenshots above are STL to STEP Assistant's answers to those questions — they're public, they're real, and they made it through Apple's review.
What the numbers say: STL to STEP Assistant runs a mixed light-and-dark set where the background shifts from screenshot to screenshot (first shot #5CA4D4) — each image has to stand on its own, so the captions carry more of the story. The accent colour we picked up, #04447C, 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.