🛠️ Tool
Freemium
Beginner
The most detailed free speed-test tool - waterfall view, device simulation, and specific fix recommendations - so you know exactly which app or image is slowing your product page down, not just that it's slow.
GTmetrix: Website Performance Testing and Monitoring
From gtmetrix.com by GTmetrix
- Free tests use Lighthouse under the hood, same as PageSpeed Insights.
- Test on 55+ simulated devices, useful for checking mobile performance on budget Android phones.
- Paid tier adds monitoring and historical tracking if you want to catch regressions after every app install.
