Fluid UI
by Fluid UIFluid UI suits designers, product managers, developers, entrepreneurs, and others who need to communicate app ideas.
Free plan Free trial From $8.25 a month AndroidiPhone & iPadWebWindowsMacLinux
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Best Game UI Design Software 2026
Planning menus, HUDs and other player-facing interfaces calls for tools that can support design, prototyping and handoff. Compared on design systems, prototype capabilities and UI animation support, the options also show whether developer handoff and real-time collaboration are covered. Included seats and primary platform can help you assess fit with your team’s workflow; free-plan availability and paid-from pricing add practical context. Fluid UI, Framer and Justinmind are among the names to consider, as are Mockplus and Pixso. Think about whether your process depends most on exploring interactions, coordinating shared work or preparing interface designs for implementation.
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Mockplus
Mockplus may suit designers, product managers, and non-designers developing early ideas, as well as designers refining interface details.
AndroidiPhone & iPadWeb+4 Record6.4 Visit
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Pixso
Pixso suits teams of designers, developers, product managers, and other collaborators working on digital products.
AndroidiPhone & iPadWeb+4 Record6.4 Visit
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UXPin
UXPin suits individuals and product teams building interactive prototypes and sharing them for comments.
AndroidiPhone & iPadWeb+2 Record6.4 Visit
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Framer
Framer suits teams building and managing websites who want visual design tools, CMS content, hosting, and collaborative workflows.
AndroidiPhone & iPadWeb+3 Record6.3 Visit
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Justinmind
AndroidiPhone & iPadWeb+4 $19 a month Record6.1 Visit Justinmind suits design teams, business analysts, and developers who need to create and share interactive web or mobile prototypes.
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Lunacy
WebWindowsMac+3 $4.99 a month Record6.0 Visit Lunacy suits designers and teams seeking graphic design tools across desktop and web, including those who need offline or private-cloud workflows.
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Marvel
AndroidiPhone & iPadWeb+1 $12 a month, billed yearly Record6.0 Visit Marvel suits individuals and teams building and sharing app or website concepts, then handing design details to developers.
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Proto.io
AndroidiPhone & iPadWeb $29 a month Record6.0 Visit Proto.io suits designers and teams who want to create and share interactive prototypes without coding.
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ProtoPie
AndroidiPhone & iPadWeb+4 $25 a month, billed yearly Record5.9 Visit ProtoPie suits designers and teams building interactive prototypes that use device features or connect multiple devices.
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FlowMapp
WebWindowsMac+1 $15 a month, billed yearly Record5.7 Visit FlowMapp suits UX planners, web designers, and teams pitching or organizing website projects.
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OpenPencil
AndroidiPhone & iPadWeb+4 Free plan Record5.5 Visit OpenPencil may suit designers who need a Figma-compatible editor, local-first workflows, or peer-to-peer collaboration.
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Penpot
WebAPISelf-hosted $7 a month Record5.5 Visit Penpot suits solo users, small teams, mid-market organizations, and enterprises needing shared design and developer handoff.
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MasterGo
AndroidiPhone & iPadWeb+4 Free plan Record5.4 Visit MasterGo may suit interface designers and teams building prototypes or design systems, particularly those who want collaboration and AI-assisted design tools.
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Sketch
iPhone & iPadWebMac $12 a month, billed yearly Record5.3 Visit Sketch suits UI and UX designers working on interfaces, design systems, and prototypes, as well as teams that need browser-based review and developer handoff.
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Moqups
WebBrowser extensionAPI $11 a month Record5.2 Visit Moqups suits individuals, solo professionals, and teams creating visual product or web materials.
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NinjaMock
Web $85 a month, billed yearly Record5.2 Visit It suits individuals and teams creating interactive app or website wireframes, prototypes, and presentations in a browser.
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Principle
iPhone & iPadWebMac+1 $129 one-time Record5.1 Visit Principle suits designers who want to prototype animated interfaces, map multi-screen flows, and share concepts with engineering teams.
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Visily
WebBrowser extension $14 a month Record5.0 Visit Visily suits founders, product managers, analysts, developers and teams who need to make UI mockups without a design-focused workflow.
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MockFlow
WebWindowsMac+1 Free plan Record4.9 Visit Basic may suit personal and nonprofit visual thinking.
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Pencil Project
WindowsMacLinux Free plan Record4.9 Visit Pencil suits people creating interface mockups or diagrams on Linux, macOS, or Windows who want a free desktop tool.
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