Chart position — tracked daily by LaunchShots
Screenshot style breakdown
Sampled from 3 of FourierSeries's App Store screenshots — background, accent and theme, measured by LaunchShots (not something Apple publishes).
#FCFCFC bg
#DDDDDD
#F4649C accent
#111111 text
Screenshots
Icon palette
About this app
Fourier Series Lab is an interactive learning app for exploring how periodic signals are rebuilt with Fourier series. Choose preset waveforms—square, triangle, or sawtooth—or enter your own expression using standard math syntax such as sin(x) + 0.5*sin(3*x). The app numerically integrates over one period to compute coefficients a₀, aₙ, and bₙ, then plots the original function alongside the partial sum so you can see convergence in real time. On the Lab tab, adjust the number of terms with a slider or stepper, tune integration accuracy, and play an animation that steps through harmonics one by one. Toggle harmonic overlays, residual curves, and live error metrics including mean squared error and maximum absolute error. The Spectrum tab breaks down each harmonic with bar charts for cosine, sine, and magnitude components, plus phase readouts. The Reference tab keeps standard formulas, st…
App details
What you can learn from FourierSeries
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 3 screenshots above are FourierSeries's answers to those questions — they're public, they're real, and they made it through Apple's review.
What the numbers say: FourierSeries 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, #F4649C, 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 Education apps approach the same problem? Browse more Education apps in the showcase.
Take what works into your own screenshots
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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.