Best I Love Adaptive Alternatives & Competitors in 2025

Test any website on desktop, mobile, and tablet

View multiple screen dimensions in one view

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Try for free Open Source freemium

Designed to test responsive websites on different devices.

Test your responsive design across different devices

Tool for quickly testing your design layout in one click.

Test your site at different screen resolutions & devices.

Develop responsive web-apps 5x faster!

Open Source free

Test your designs online through this open-source, responsive test tool.

see your website in multiple screen resolutions

Make websites work better on mobile devices

LT Browser is a free dev friendly browser for developers and testers. You can see mobile view of website on different screen sizes and resolution on 50+ pre installed view ports. You can build, test and debug your website faster then ever.

Chrome Extension for designers to test responsive websites.

A platform for better user onboarding. Build, manage and improve product tours without code.