Yeah, I’ve actually dealt with this a lot while helping friends set up W88 on older phones. The best place to grab the lightweight, optimized version is https://w88club.in/app/ that’s the official download page, and they provide an APK that runs really smoothly even on devices with lower RAM.
I’ve noticed it loads faster and uses fewer resources compared to older builds floating around online. If you want something stable, clean, and friendly for weaker Android models/