Photo by Omar Al-Ghossen via Unsplash

Flutter & its ‘poor’ iOS performance

Thomas Middel
4 min readFeb 22, 2021

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Flutter’s not all fun and games, the current drama on ‘iOS jank’ is causing lots of developers to either stay away from Flutter or convert their existing Flutter apps to something else. Should you do too, or are people blowing this issue out of proportion?

My feed has been blowing up these last few weeks or so. Whether it’s Twitter, Reddit, or Youtube, everyone’s talking about this so-called ‘iOS jank’ Flutter issue. For those of you that didn’t see it yet, click here to check out the issue (which is one of many).
In short: Flutter apps on iOS are having a lot of issues playing animations for the first time. Even something as simple as a default page transition can be stuttery at first, causing a lot of developers to question whether they should put their Flutter apps in production in the first place. Performance on iOS just seems off, so developers are turning to other cross-platform solutions, going (back) to native development, or are considering something like Kotlin Multiplatform.

How does the issue look? Just check out the video below, notice how the animation is stuttery at first but is smooth later on:

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