Who Can Use might be a bit more popular than A Best-in-Class iOS App. We know about 1 link to it since March 2021 and only 1 link to A Best-in-Class iOS App. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I bought this one: https://bestinclassiosapp.com/ and I liked it personally. Source: almost 2 years ago
You can also use whocanuse.com to check the colour contrast of a text/background combo, and tweak one or both colours to find an accessible combination. Source: almost 2 years ago
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Colour Contrast Analyser - TPGi's ADA Color Contrast Checker checks for helps determine the accessibility the contrast ratio of two colors for WCAG AA and AAA.
SwiftHub - GitHub iOS client in RxSwift and MVVM-C clean architecture
Cron Color - Free web tool for designing color palettes and checking contrasts.
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Kontrast - Check and adjust web element contrast in real time.