Sampled from 4 of Thermomator: Heat Monitor's App Store screenshots — background, accent and theme, measured by LaunchShots (not something Apple publishes).
#FCFCFC bg
#DDDDDD
#144454 accent
#111111 text
Your iPhone gets hot. Then your game stutters, your video stops recording, and your battery quietly loses capacity you never get back. Thermomator shows you the moment it happens — live, on your Lock Screen and in the Dynamic Island. WHAT'S ACTUALLY GOING ON iOS is constantly deciding how hard your device is allowed to work. When it gets too warm, it throttles: frames drop, 4K recording halts, charging slows to a crawl. You feel all of this. You almost never get to see it. Thermomator makes that invisible decision visible. - Live Activities — watch your thermal state change in real time in the Dynamic Island, on the Lock Screen, or in StandBy. - Widgets in three sizes — a glance is enough. - Chart View — see exactly when your device crossed the line, and for how long it stayed there. - Notifications — know the second iOS starts holding your device back. - History and export — C…
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 7 screenshots above are Thermomator: Heat Monitor's answers to those questions — they're public, they're real, and they made it through Apple's review.
What the numbers say: Thermomator: Heat Monitor runs a light set with one background colour (#FCFCFC) 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, #144454, 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 Utilities apps approach the same problem? Browse more Utilities apps in the showcase.
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 →Closest background + accent colours among the listings we've analysed — useful when you want to see the same palette handled by a different team.