Best Declarative UI Framework Apps

195+ iOS apps curated and reviewed

4.5 avg rating
19 free apps
Updated June 2026

Looking for free declarative ui framework apps? 19 of our 195+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Top Picks for Declarative UI Framework

POP - Prototyping on Paper#1

POP - Prototyping on Paper by Ballpark Labs Ltd

Prototype & Design Apps
Editor's Choice
📚 Education
4.6(1.2K ratings)
Free
POP - Prototyping on Paper screenshot 1
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POP - Prototyping on Paper screenshot 4

Design interactive app prototypes directly on your mobile device. Create interfaces with a vast library of assets or import your paper sketches. Turn your designs into tappable demos and share them easily.

Figma#2

Figma by Figma, Inc.

View Designs. Comment. Mirror.
Strong Contender
🎨 Graphics & Design
4.6😞(21K ratings)
Free
#54in Graphics & Design
Figma screenshot 1
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Figma screenshot 6

Access and review design files, prototypes, and presentations on your mobile device. Collaborate with teammates by adding and replying to comments, sharing files, and managing permissions. Mirror designs in real-time and explore prototypes with interactive features.

What We Love

  • 🚀 Useful for previewing designs
  • 👍 Great for prototyping
  • 🚀 Convenient to mirror screen on a real device

Room to Improve

  • 🐛 Buggy and unreliable mirroring
  • 🐛 Crashes and freezes often
  • 👎 Limited functionality compared to desktop
Numbers: Make Spreadsheets#3

Numbers: Make Spreadsheets by Apple Inc.

Create impressive spreadsheets
Worth Considering
📊 Productivity
4.6😐(212K ratings)
Free
Numbers: Make Spreadsheets screenshot 1
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Design impressive spreadsheets with a flexible canvas, interactive charts, and powerful functions. Collaborate with others and access your work across devices. Includes tools for data analysis and text composition.

What We Love

  • 🚀 Easy to use
  • 🚀 Intuitive interface
  • 🚀 Seamless integration with Apple ecosystem
  • 🚀 Great for basic spreadsheet needs

Room to Improve

  • 🐛 Frequent crashes and stability issues
  • 🐛 Compatibility problems with Excel files
  • 🐛 Limited functionality compared to Excel

More Declarative UI Framework apps to explore

4
Todoist: To Do List & Calendar
Todoist: To Do List & Calendar
Todoist: To Do List & Calendar
Task manager & Reminders
Free

Organize your personal and professional life with this intuitive task manager. Capture ideas naturally, manage projects with flexible views, and collaborate with teams seamlessly. It syncs across all your devices, ensuring nothing falls through the cracks.

Natural language task inputQuick Add functionalityFlexible project views (list, board, calendar)
📊 Productivity
(127K)
freemium
5
Mimo: Learn Coding/Programming
Mimo: Learn Coding/Programming
Mimo: Learn Coding/Programming
Code Python, HTML, JavaScript
Free

Learn to code in Python, JavaScript, HTML, CSS, and SQL with AI-assisted development. This app guides you from beginner to building production-ready software and portfolio projects. Master modern developer workflows and launch your career.

Learn Python, JavaScript, HTML, CSS, SQLAI-assisted software developmentBuild portfolio projects
📚 Education
(108K)
free with in-app purchases
6
Notion: Notes, Tasks, AI
Notion: Notes, Tasks, AI
Notion: Notes, Tasks, AI
Task & project management app
Free

This AI-powered workspace helps you write notes, manage tasks, organize projects, and collaborate with others. It offers features like AI meeting notes and interactive maps to streamline your workflow for personal, student, or professional use.

AI-powered note-taking and summarizationTask and project managementCollaborative workspace
📊 Productivity
(87K)
free with in-app purchases
7
Mockup - UI/UX Design
Mockup - UI/UX Design
Mockup - UI/UX Design
Sketch, Wireframe, Prototype
Free

Design and prototype user interfaces and user experiences for apps and websites. Sketch ideas with Apple Pencil, create detailed wireframes with pre-set elements, and build interactive prototypes. Collaborate with others and export your designs in various formats.

Flexible canvas with device framesSketching tools with Apple Pencil supportWireframing with a library of preset elements
🎨 Graphics & Design
(521)
free with in-app purchases
8
Marvel — Design and Prototype
Marvel — Design and Prototype
Marvel — Design and Prototype
Design and Prototype Apps
Free

Bring your app ideas to life quickly by turning sketches and mockups into interactive prototypes. Easily design, link screens, and share your app demos on various devices. Perfect for visualizing and testing new concepts.

Design apps on iPhone/iPadTurn sketches into interactive prototypesLink screens with touch areas
📊 Productivity
(2.6K)
free
9
Obsidian - Connected Notes
Obsidian - Connected Notes
Obsidian - Connected Notes
Your second brain on the go
Free

Organize your thoughts and ideas with a powerful knowledge base that utilizes local Markdown files. This app acts as your personal second brain, accessible on your mobile device for seamless note-taking and idea connection.

Local Markdown file storageCustomizable toolbarGraph view for connections
📊 Productivity
(2.4K)
free
10
Uxcel: Learn UX & UI Design
Uxcel: Learn UX & UI Design
Uxcel: Learn UX & UI Design
UX design, PM & AI courses
Free

Learn modern product skills like UX design, product management, and AI through bite-sized, interactive lessons. Gain career-focused knowledge and earn industry-recognized certificates to advance your professional journey.

Interactive UX design coursesProduct management frameworksAI fundamentals and principles
📚 Education
(126)
free with in-app purchases
11
Principle Mirror
Principle Mirror
Principle Mirror
Interaction & UI Design
Free

Design interactive user interfaces with this companion app for a popular Mac design tool. Seamlessly open Principle files or mirror your Mac's design work directly to your device.

Open Principle filesMirror Principle for MacInteractive UI design
📊 Productivity
(14)
free
12
Lucidchart
Lucidchart
Lucidchart
Flowchart & Diagram Maker
Free

Create and view diagrams like flowcharts, mind maps, and org charts on your mobile device. This visual workspace facilitates real-time collaboration and data visualization. Diagrams sync instantly to your account and can be exported in various formats.

Create and edit diagramsPre-built templatesDrag-and-drop functionality
📊 Productivity
(5.3K)
free with in-app purchases
13
Pyto IDE
Pyto IDE
Pyto IDE
Python, C/C++
Free

This app offers a powerful integrated development environment for Python, C, and C++ on iOS devices. It includes a Python interpreter with extensive libraries, a C/C++ compiler, a terminal, and a code editor with advanced features like code completion and debugging.

Python 3.10 InterpreterC/C++ CompilerCode Editor with Completion
🛠️ Developer Tools
(957)
free with in-app purchases
14
Learn Python・Coding-AI Compile
Learn Python・Coding-AI Compile
Learn Python・Coding-AI Compile
Practical Programming Lessons
Free

Master Python programming with interactive lessons, coding challenges, and quizzes. Practice in a built-in editor, test your knowledge, and track your progress. Ideal for beginners and those looking to enhance their coding skills.

Step-by-step Python tutorialsInteractive coding exercisesBuilt-in code editor
📚 Education
(3.1K)
freemium
15
Pythonista 3
Pythonista 3
Pythonista 3
Python IDE
$9.99

Develop and run Python 3 scripts directly on your iPad or iPhone. This complete scripting environment includes popular third-party modules and allows access to iOS features like sensors, location, and photos. Automate your device with app extensions and integrate with Shortcuts and Siri.

Powerful code editor with syntax highlightingInteractive prompt with code completionIntegrated visual debugger
📊 Productivity
(1.5K)
paid
16
Numerical³
Numerical³
Numerical³
The Calculator Without Equal
Free

A powerful and beautifully designed calculator app that offers advanced scientific functions, automatic bracket handling, and a unique no-equals button interface. It integrates seamlessly with iOS features like widgets and keyboards for calculations anywhere.

No equals button interfaceAutomatic bracket handlingFull scientific keypad
🔧 Utilities
(1.3K)
paid
17
DetailsPro
DetailsPro
DetailsPro
Design tool for SwiftUI™
Free

A design tool for Apple developers to create SwiftUI interfaces visually without coding. It supports various SwiftUI views, modifiers, and SF Symbols, with options to export to Xcode and Swift Playgrounds. An optional premium upgrade offers advanced prototyping and templates.

Visual SwiftUI view creationCode-free designExport to Xcode and Swift Playgrounds
🛠️ Developer Tools
(27)
freemium
18
MIT App Inventor
MIT App Inventor
MIT App Inventor
by Massachusetts Institute of Technology
Free

Learn programming and build mobile applications using a visual, block-based interface. This educational tool helps users understand computational thinking and design their own projects, with built-in tutorials and over 60 components for diverse app creation.

Visual block-based programmingMobile app developmentComputational thinking education
📚 Education
(834)
free
19
Profound UI
Profound UI
Profound UI
by Profound Logic Software
Free

Access and manage IBM i server data on your iPhone or iPad in real-time. Convert existing character-based applications into enriched mobile interfaces, with features like photo uploading using the device camera.

Real-time IBM i data accessUpdate and integrate IBM i dataUse native device features (e.g., camera)
💼 Business
(7)
free
20
YouWare-Vibe Code Apps with AI
YouWare-Vibe Code Apps with AI
YouWare-Vibe Code Apps with AI
Build Websites with No Code
Free

Build websites and web apps without coding using AI. Process text, voice, or screen recordings to generate functional products, from design to deployment. Automates the entire development stack for production-ready applications.

AI-driven code generation from multi-modal inputsAutomated full development stack (design, frontend, backend, deployment)Integrated backend infrastructure (YouBase)
📊 Productivity
(17)
free with in-app purchases