Duo app icon

Apps Like Duo for iPhone and iPad

Test responsive web design views simultaneously.

The app displays a desktop and mobile view simultaneously for responsive web design testing. Users can navigate both panes with synchronized browsing and access WebKit Dev Tools for debugging.

by Electric Pulp★ 0.00 ratingsDeveloper Tools$4.99Data updated 2026-10-25
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Ranked alternatives

Showing 281–300 of 1,000 ranked alternatives.

  1. JS Runner app icon

    JS Runner

    兰桂 吴

    Write and run code instantly.

    The app allows users to write and run JavaScript/HTML code instantly. It supports console.log() and features syntax highlighting, auto completion, and various themes.

    ★ 0.00 ratingsDeveloper Tools$1.99Data updated 2026-10-18
    App details
  2. GraceBlocks mobile app icon

    GraceBlocks mobile

    GraceRock LLC

    Design systems, build apps, deploy solutions

    Create and deploy web and apps using a no-code interface. Build simple systems, enterprise extensions, or tracking solutions with point-and-click tools. Design user interfaces and connect data sources without programming.

    ★ 5.06 ratingsBusinessFreeData updated 2026-09-06
    App details
  8. Lynx Go - Dev Explorer app icon

    Lynx Go - Dev Explorer

    Pranshu Chittora

    Run apps, debug, and test on iOS

    Run apps directly on iOS devices without manual builds or installations. Use hot reloading to see real-time code changes. Explore interfaces and test functionality on actual devices.

    ★ 5.05 ratingsDeveloper ToolsFreeData updated 2026-09-06
    App details
  10. Learn - iPhoto '11 Edition app icon

    Learn - iPhoto '11 Edition

    Swanson Digital, LLC

    Learn iPhoto '11 Edition Videos

    The app provides over 2 hours of HD video tutorials covering photo organization, editing, and output. It features 28 individual lessons with zooms, pans, and highlights, along with keyboard shortcuts and a notes pane for PDF export.

    ★ 0.00 ratingsPhoto & Video$5.99Data updated 2026-09-21
    App details

How we rank alternatives

Apps are ranked by functional similarity, category fit, rating confidence, and popularity.