Flutter Engine

Flutter apps tend to have bigger initial download sizes due to the embedded graphics engine and framework, which can be a concern for mobile users with limited data or storage, unlike leaner native alternatives.

Flutter web uses canvas rendering in many cases, leading to heavier page loads and SEO challenges compared to traditional web frameworks, making it less ideal for content-heavy or SEO-critical sites.

Requires learning Dart, a less common language compared to JavaScript or Swift/Kotlin, which can increase onboarding time and limit pool of developers familiar with the ecosystem.

While Flutter has thousands of packages, its ecosystem is younger than React Native or native platforms, occasionally lacking specialized libraries or having less battle-tested solutions for niche use cases.