Personalised AI workout generator from scratch
Macaly's AI agent created a complete fitness app from the ground up — featuring a sleek dark gym aesthetic, intelligent equipment selection, AI-generated workouts with sets, reps and rest periods, live progress tracking, and a full workout history. Six prompts. One production-ready training app.
Try it yourself →Overall Stats
Features
Author
1. Describe the app and get a working product
One prompt was all it took. The AI generated the entire application — equipment selection, goal options, workout duration slider, plus an AI engine that creates complete training sessions with exercises, sets, reps, rest intervals, technique guidance and calorie estimates. Dark theme, neon green highlights and bold typography included.
2. Add real-time persistence
A workout shouldn't disappear after a refresh. The agent connected everything to a database, linking workouts to individual exercises, supporting anonymous sessions, and saving completion status for every set. Every change updates instantly in real time.
3. Build workout history
A single prompt produced a complete workout history screen — displaying training goal, session length, estimated calories, completion progress and relative timestamps. Open any previous workout to review it, or remove it with a single click.
4. Replace emojis with proper icons
A visual refresh. Every emoji was replaced with carefully selected SVG icons — including dumbbells, barbells, kettlebells, resistance bands, a runner, yoga pose and lightning bolt — all designed to adapt automatically to the app's theme.
5. Polish and fix edge cases · Prompts 5–6
The final prompts focused on refinement. A nested button issue was identified and fixed, keyboard navigation was improved, and 18 automated tests were added and verified across the codebase. No errors remained.
What the agent built
AI-generated workouts, never templates
Each workout is created from scratch based on your chosen equipment, fitness goal and available time. Every plan includes exercises, sets, reps, rest periods and a realistic calorie estimate, so no two workouts are the same.
Live progress tracking
Tick off each exercise as you complete it and your progress is saved to the database immediately. Close the app and return later — your workout will still be exactly where you left it.
Six equipment types, four training goals
Choose from dumbbells, barbells, pull-up bars, resistance bands, kettlebells or bodyweight training. Whether your goal is strength, cardio, flexibility or HIIT, every combination produces a workout tailored to your setup.
Custom SVG icon system
A curated collection of scalable SVG icons replaces every emoji. Dumbbells, kettlebells, running figures and more automatically adjust to the active theme, delivering a cleaner and more polished interface.
Premium dark gym aesthetic
Large, bold typography, neon green accents and a near-black colour palette combine to create a premium fitness experience that feels like a polished product rather than a side project.
Workout history with complete recall
Every AI-generated workout is stored for later viewing, with key details including goal, duration, calorie estimate and completion status visible at a glance. Delete old sessions whenever you like.
Celebrate every completed workout
Complete every exercise and unlock a celebration banner summarising your workout statistics — a rewarding finish to every training session.
18 tests, zero errors
The backend, workout generation logic and interface rendering were all thoroughly tested before handover. If an issue appears, the automated test suite is designed to catch it first.
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