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

Duo screenshots

Ranked alternatives

Showing 341–360 of 1,000 ranked alternatives.

  1. Web Monitor - HTML Inspector app icon

    Web Monitor - HTML Inspector

    杏娣 吴

    Inspect web pages and analyze HTTP responses

    Retrieve , CSS, and JavaScript code from web pages directly on your mobile device. View code with syntax highlighting. Test HTTP requests and analyze server responses including headers, status codes, and payload details. Share or copy content easily.

    ★ 5.03 ratingsDeveloper ToolsFreeData updated 2026-09-06
  2. Developer Laboratory app icon

    Developer Laboratory

    恒盛 程

    Create icons and mockups

    Create icons and mockups for iOS. Mimic WeChat Moments and image viewer interfaces. Prevent @mentions on Sina Weibo. Imitate Alipay password prompts and post circles. Implement tags, JS interaction, and web page loading.

    ★ 4.76 ratingsDeveloper ToolsFreeData updated 2026-09-06
  3. NFC Script app icon

    NFC Script

    Socket Mobile

    Connect to NFC tags and SmartCards

    Connect to NFC and SmartCard devices via Bluetooth Low Energy. Retrieve ATR data and exchange ISO 7816 APDUs. Read and write NFC tags and HF labels. Manage PCSC interface for card communication. Explore and validate RFID and SmartCard interactions.

    ★ 5.02 ratingsDeveloper ToolsFreeData updated 2026-09-26
  1. aaPanel app icon

    aaPanel

    Guangdong Baota Safety Technology Co., Ltd.

    Manage servers with web-based GUI

    Manage web servers via web-based GUI. Install LNMP/LAMP environments with one-click. Monitor server status and resources. Configure domains and databases. Automate deployment tasks. Access detailed logs and analytics.

    ★ 5.02 ratingsUtilitiesFreeData updated 2026-09-06
  2. FILTRY: Presets for Lightroom app icon

    FILTRY: Presets for Lightroom

    Recca Nino

    Apply , edit photos, share instantly

    Apply to photos with one tap. Adjust colors, exposure, and contrast manually. Sync edits with CC via Adobe Creative Cloud. Export edited images in various formats. Share directly to Instagram or blogs.

    ★ 3.73 ratingsPhoto & VideoFreeData updated 2026-09-06
  3. RavitUp app icon

    RavitUp

    PT Tritunas Solusi Gemilang

    ★ 0.00 ratingsDeveloper ToolsFreeData updated 2026-09-06
  4. GlyphSmith app icon

    GlyphSmith

    Bright Light Interstellar Limited

    ★ 0.00 ratingsGraphics & Design$29.99Data updated 2026-09-06
  5. iQR codes - QR Code Art Studio app icon

    iQR codes - QR Code Art Studio

    MAREK HRUSOVSKY

    Generate unique custom QR codes easily.

    The app generates classic and customized QR codes without an internet connection. Users can customize the look of QR codes with graphic styles, roundness, colors, shadows, and logos.

    ★ 0.00 ratingsGraphics & Design$14.99Data updated 2026-09-25
  6. Data Modeler app icon

    Data Modeler

    Rahul Katariya

    Create models, export , visualize schemas

    Create models by defining entities, relationships, attributes, and cardinalities. Visualize models with an intuitive editor. Export models for use in apps, websites, or databases. Add test to validate functionality.

    ★ 4.45 ratingsDeveloper ToolsFreeData updated 2026-09-06
  7. Actioneer - Command your CI app icon

    Actioneer - Command your CI

    Sergei Armodin

    Browse GitHub repos and check action runs

    Browse GitHub repositories to view Actions workflows and recent runs. Check run status with badges and counts. Download and preview job logs for troubleshooting. Dispatch, cancel, or re-run workflows directly from the .

    ★ 0.00 ratingsDeveloper ToolsFreeData updated 2026-09-06

How we rank alternatives

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