← Macaly AI Health & Fitness

Personalised AI workout generator built from scratch

Macaly’s AI agent built an entire fitness app from the ground up — complete with a premium dark gym aesthetic, intelligent equipment selection, AI-generated workouts featuring sets, reps and rest intervals, live progress tracking, and a comprehensive workout history. Five prompts. One production-ready fitness app.

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Overall Stats

9 minutes 5 prompts

Features

AI Generation Database Progress Tracking SVG & Illustrations Custom Design App & Tool

Author

Macaly AI
AI workout generator app built with Macaly AI
AI Generation

1. Describe the app and generate a working product

A single prompt kickstarted the entire build. The AI created the complete application — including equipment selection, fitness goals, a workout duration slider, and an AI engine capable of generating full training plans with exercises, sets, reps, rest periods, technique guidance and estimated calorie burn. It even delivered the dark theme, neon green highlights and bold typography.

“Build me an AI workout generator. I pick my equipment, choose a goal (strength, cardio, flexibility, HIIT), set a time (15–60 min), and it generates a full workout with exercises, sets, reps, rest times and form tips. Dark gym aesthetic with neon green accents. Track completion and save workout history.”

Database

2. Add real-time persistence

Workouts shouldn’t vanish when you refresh the page. The agent integrated a database, linking workouts to individual exercises, supporting anonymous users, and storing completion status for every set. Progress is synced instantly, so every update is saved in real time.

“Save workouts to a database so I can close the app and come back to them. Track which exercises I’ve completed.”

Progress Tracking

3. Create workout history

One prompt produced a fully featured workout history page, displaying training goals, session duration, estimated calories, completion progress and relative timestamps. Reopen any previous workout to review it, or delete it in a single click.

“Add a history tab where I can see and revisit my past workouts.”

SVG & Illustrations

4. Replace emojis with professional icons

A complete visual upgrade. Every emoji was swapped for carefully chosen SVG icons, including dumbbells, barbells, kettlebells, resistance bands, a runner, yoga pose and lightning bolt. Each icon automatically adapts to the active theme for a more refined interface.

“Replace all emojis with nice illustration icons.”

Custom Design

5. Refine and resolve edge cases

The final prompts focused on polishing the experience. A nested button issue was resolved, keyboard accessibility was improved, and 18 automated tests were added and validated across the project. The result: a clean build with no remaining errors.

“Fix the nested button error in workout history.”

What the AGENT BUILT

AI-generated workouts, created from scratch

Every workout is generated specifically for your chosen equipment, fitness goal and available time. Each session includes exercises, sets, reps, rest periods and an estimated calorie burn, ensuring every workout feels unique rather than relying on fixed templates.

Live workout progress

Mark each exercise as you complete it and your progress is saved instantly to the database. Leave the app at any point and return later — your workout will be waiting exactly as you left it.

Six equipment options, four fitness goals

Select from dumbbells, barbells, pull-up bars, resistance bands, kettlebells or bodyweight training. Whether you’re training for strength, cardio, flexibility or HIIT, every combination generates a workout tailored to your available equipment.

Custom SVG icon library

A hand-picked collection of scalable SVG icons replaces every emoji throughout the app. Dumbbells, kettlebells, runners and more automatically adapt to the current theme, creating a cleaner, more consistent user experience.

Premium dark gym styling

Bold typography, neon green accents and a near-black colour palette come together to create a premium fitness interface that feels like a polished commercial product rather than a simple prototype.

Workout history with full recall

Every AI-generated workout is stored for future reference, with key details such as fitness goal, workout duration, estimated calories and completion status available at a glance. Old sessions can be removed whenever you choose.

Celebrate every completed session

Finish every exercise in your workout and unlock a celebration banner highlighting your training statistics — the perfect way to round off each completed session.

18 automated tests, zero errors

The backend, workout generation engine and user interface were all thoroughly tested before handover. Should an issue arise in the future, the automated test suite is designed to detect it before it becomes a problem.

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