1. Unoptimized images and assets

High-resolution images are great — until they bog down performance.
Use image compression and lazy loading to reduce initial load time without compromising quality.

2. Too many network requests

Every API call or analytics ping costs time and energy.
Batch requests and cache intelligently to minimize unnecessary traffic and boost responsiveness.

3. Lack of proper memory management

Memory leaks, unused objects, and heavy data structures can crash your app or slow it to a crawl.
Profile memory usage regularly and clean up unused resources.

4. Poorly implemented animations

Animations should feel smooth, not sluggish.
Use GPU-accelerated animations and avoid blocking the main thread to keep interactions fluid.

5. Blocking the main thread

Heavy tasks like parsing JSON or resizing images shouldn’t happen on the UI thread.
Move intensive operations to background threads using async/await, coroutines, or GCD.

6. Not using platform-native optimizations

Every OS offers tools to help — from SwiftUI’s lazy stacks to Android’s Jetpack libraries.
Leverage native frameworks and tools tailored for performance.

7. Skipping real device testing

Emulators are great, but they don’t tell the whole story.
Test on low-end physical devices to catch real-world performance issues early.

Optimizing app performance isn’t just about speed — it’s about trust. Users associate smooth apps with professionalism, and every lag or crash chips away at that trust.

Take a moment to audit your app. These seven tweaks could be the difference between 1-star reviews and rave ratings.