Creating applications used to be a complex and time-consuming challenge, requiring deep coding knowledge and careful planning. Today, with the rise of generative AI, developers and creators can rapidly design, prototype, and deploy functional apps with minimal manual effort, transforming the way software is built. Using AI to build single page apps offers several advantages:

• Speed & Efficiency: AI can generate code quickly, reducing development time from days to minutes.

• Lower Barrier to Entry: Even non-experts can create functional apps using natural language prompts.

• Rapid Prototyping: Ideas can be turned into working apps almost instantly, ideal for testing concepts.

• Customization & Scalability: AI can adapt code to specific requirements, enabling multiple apps to be generated efficiently.

This blog post will showcase how you can use a base prompt as a starting point to create your own single page app. In addition, some app ideas with prompts will be provided as references.

Base Prompt

Create a single app page in a single HTML file called "[App Name]" with UI style of "[UI Style]" and features:

1. [Feature 1]
2. [Feature 2]
3. [Feature 3]
4. [Feature 4]

First, all you need is a base prompt that provides the structure when creating an app. You can also add or remove features based on your preferences. Then, let's move on to app creation with Claude Sonnet 4 using prompts that extend from the base prompt.

Time Click Challenge

A reflex-based game where players try to stop a digital clock exactly at a target time using the space bar. The closer they are, the higher their score. Why create Time Click Challenge? Simple to build, fun to play, and highly addictive. Great for testing reaction time and hand–eye coordination while offering a competitive leaderboard element.

Prompt

Create a single app page in a single HTML file called "Time Click Challenge" with UI style of "Digital clock face, bold animations for scoring feedback, bright neon colors" and features:

1. Stop the clock at the target time using the Space bar
2. Scoring based on accuracy
3. Leaderboard for high scores
4. Countdown option for harder mode

Time Click Challenge.

You can try out Time Click Challenge here.

Astro Quiz

A space-themed quiz that challenges players with astronomy and astrophysics questions, scoring them based on correct answers. Why create Astro Quiz? Makes learning about the universe engaging and interactive. Perfect for science outreach, schools, and space enthusiasts who enjoy testing their cosmic knowledge.

Prompt

Create a single app page in a single HTML file called "Astro Quiz" with UI style of "Dark starfield background, neon cyan highlights, animated transitions" and features:

1. Randomized space-themed questions
2. Score tracking
3. Difficulty scaling
4. Timer challenge with fun facts after answers

Astro Quiz.

Try Astro Quiz in here.

QR Connect

A tool that instantly generates QR codes from links or text for quick mobile scanning. Why create QR Connect? QR codes are essential for fast information sharing. A lightweight, offline-capable generator provides accessibility without relying on third-party services.

Prompt

Create a single app page in a single HTML file called "QR Connect" with UI style of "Clean single-column layout, large preview, bold typography" and features:

1. Generate QR codes from text or URLs
2. Download as PNG or SVG
3. Customize colors and size
4. Instant preview

QR Connect.

The showcase of QR Connect.

World Clock Explorer

Displays the current time in countries across different time zones with an intuitive interface. Why create World Clock Explorer? Ideal for remote teams, travelers, and businesses working across borders. Simplifies planning by making time differences easy to visualize.

Prompt

Create a single app page in a single HTML file called "World Clock Explorer" with UI style of "Light world-map background, list view with flags and time info" and features:

1. Set custom time
2. Show equivalent time in major cities
3. Search by country
4. Compare multiple times side by side

World Clock Explorer.

Here to check out World Clock Explorer.

SketchBoard

A lightweight drawing app for quick sketches, notes, and creative doodles. It features a simple canvas, brush, eraser, and save options for easy use on any device. Why create SketchBoard? To give everyone a minimal, distraction-free space where creativity flows naturally and ideas can be captured instantly without complex tools.

Prompt

Create a single app page in a single HTML file called "SketchBoard" with UI style of "Minimal and Clean, Dark Mode, Retro Pixel" and features:

1. A canvas for freehand drawing with mouse or touch
2. Brush tool with adjustable color and size
3. Eraser tool to remove parts of the drawing
4. Button to clear the canvas and a button to save the drawing as an image

SketchBoard.

Here is the demo link of SketchBoard.

Snake Arena

A classic game where players guide a snake to eat and grow while avoiding collisions. Why create Snake Arena? It offers a relaxing experience through its steady rhythm and focus, while also encouraging reflection, patience, and mindfulness.

Prompt

Create a single app page in a single HTML file called "Snake Arena" with a UI style of "retro arcade pixel style" and features:

1. Classic Snake Gameplay – use arrow keys to start the game, move the snake, and eat food.
2. Score Tracking – display the current score and high score at the top.
3. Levels & Speed Increase – the snake moves faster as the score increases.
4. Restart & Pause Options – include buttons to restart the game or pause/resume (with space bar support and guide text).

Snake Arena.

You can play Snake Arena here.