Fluid UI vs Quickmock

Fluid UI is a web-based tool for making, previewing, sharing, and exporting mobile app mockups. It supports interactive web and mobile prototypes with taps, swipes, clicks, and other gestures, plus page effects such as fades, flips, and pop-ins. The built-in library contains more than 2,000 components spanning Material Design, iOS, Windows, and wireframe styles. Teams can collaborate on cloud-saved projects in real time. Reviewer mode supports shared click-throughs, chat, annotations, and comments, and the service also supports remote user testing sessions. Fluid UI runs in Firefox and Chrome, offers an installable desktop client, and has Android and iOS preview apps. There is a free plan and a free trial. Paid plans include Solo at $8.25 a month for five active projects, one user license, and unlimited reviewers; Pro is $19.08 a month, and Team is $41.58 a month.

Quickmock is a free, open-source tool for making low-fidelity wireframes. Its editor provides pages, device frames, UI components, shapes, text components, and wireframe elements. Commands include creating and opening projects, saving and exporting, undoing and redoing, copying, pasting and deleting, zooming, and changing settings. The homepage says Quickmock is now available only on desktop, although the listed Free plan names web as its platform. The broader platform list also includes Android, iOS, Linux, macOS, Windows, API, extensions, and self-hosted use. The project README describes a VS Code extension that edits .qm files and configures an MCP server for AI tools. It also says organizations can create custom low-fidelity component libraries, with quotes available by email. Quickmock is identified as free and open source under an MIT license. Users can report bugs or request features through GitHub Issues.