20 Side Project Ideas You Can Build with AI This Weekend

Twenty side project ideas you can build with an AI app builder, each with who it's for, why it matters, and a first version small enough to finish.

Mythex Team · 2026-09-29 · 6 min read

A good side project to build with AI is small enough to finish in a weekend, useful to someone you know, and interesting enough that you'll keep improving it. The twenty ideas below are grouped by type; each says who it's for, why it matters, and the first version (MVP) to build. All of them are web apps an AI app builder can produce from a plain-language description — you describe it, test it in a preview, and publish it to a link you can share.

How to pick one

A side project works best when:

You are a user. You'll notice what's wrong and keep fixing it.
Someone else wants it. A friend, a club, a colleague — a real first user.
The first version is tiny. One core job, three to five screens.
It teaches you something. Login, a database, payments, an API — pick one new thing per project.

If you want the project to earn money eventually, look at micro-SaaS ideas instead — those are chosen for a paying audience.

Personal tools

1. Subscription tracker

For: Anyone losing track of streaming, software and membership fees.
Why it matters: Shows the real monthly total and warns before renewals and trial ends.
MVP: Add subscriptions with price, cycle and renewal date; a monthly total; an upcoming renewals list.

2. Habit tracker with streaks

For: You and anyone building a routine.
Why it matters: Visible streaks are a simple, effective motivator.
MVP: Habits, daily check-offs, streak counts and a calendar view. See how to build a habit tracker app.

3. Reading list and notes

For: Readers who forget what they read and why they liked it.
Why it matters: Your notes and highlights in one searchable place.
MVP: Books with status (want, reading, done), rating, notes, and a search.

4. Meal planner and shopping list

For: Households that decide dinner at 6pm every day.
Why it matters: Plan the week once and generate the shopping list from it.
MVP: Recipes with ingredients, a weekly plan grid, and a combined shopping list.

5. Personal CRM for keeping in touch

For: People who mean to stay in touch with friends and contacts but forget.
Why it matters: Nudges you when it's been a while.
MVP: Contacts with a "contact every X weeks" setting, a log of last contact, and a due list.

Hobbies and interests

6. Collection catalogue

For: Collectors of records, plants, board games, sneakers.
Why it matters: Know what you have, what it's worth to you, and what you're looking for.
MVP: Items with photo, details and tags; a wishlist; a public page to share your collection.

7. Training log for one sport

For: Runners, climbers, lifters, swimmers.
Why it matters: Generic fitness apps rarely track what your sport cares about.
MVP: Sessions with sport-specific fields, personal bests, and a simple progress chart.

8. Garden planner

For: Home gardeners and allotment holders.
Why it matters: Remember what was planted where and when to sow, water or harvest.
MVP: Beds, plants with dates, a to-do list by week, and notes per season.

9. Recipe box for a family

For: Families who want grandma's recipes in one place.
Why it matters: Recipes stop living in photos and group chats.
MVP: Recipes with photos, categories, a shared login for the family, and printable pages.

Community and groups

10. Club or team organiser

For: Five-a-side teams, book clubs, running groups.
Why it matters: One link for fixtures, who's coming and who's paid, instead of a busy group chat.
MVP: Events, RSVP, a member list and a simple payments-received tracker.

11. Local directory

For: A neighbourhood, a niche (vegan cafes in your city) or an interest group.
Why it matters: Useful, shareable, and a good way to learn search and filters.
MVP: Listings with categories and location, search and filters, and a "suggest a listing" form. See how to build a directory website.

For: Schools, charities, community events.
Why it matters: Replaces paper sheets and endless reply-all emails.
MVP: Shifts with slots, sign-up with name and email, and a list for the organiser.

13. Tool or item lending library

For: Neighbours, offices, clubs sharing equipment.
Why it matters: People borrow instead of buying things they use twice a year.
MVP: Items with owner and availability, a borrow request, and a return date.

Work and career

14. Job application tracker

For: Anyone job hunting.
Why it matters: Know where you applied, what stage you're at, and when to follow up.
MVP: Applications with company, role, stage, dates and notes; a kanban board by stage.

15. Portfolio site with a project database

For: Designers, developers, writers and photographers.
Why it matters: A portfolio you can update in minutes without editing pages by hand.
MVP: Projects stored as records, a public portfolio page, and a contact form. See how to build a portfolio website.

16. Interview question bank

For: Hiring managers or candidates preparing for interviews.
Why it matters: Reusable, organised questions and notes instead of scattered documents.
MVP: Questions by topic and level, notes per question, and a random practice mode.

Learning and AI-powered projects

17. Flashcard app with spaced repetition

For: Language learners and students.
Why it matters: Reviewing cards at the right time is how memory sticks.
MVP: Decks, cards, a review session, and a simple schedule that shows hard cards more often.

18. AI writing helper for one task

For: A specific job — product descriptions for a shop, lesson plans for teachers.
Why it matters: A focused tool with good prompts beats a general chatbot for repeated work.
MVP: A form for inputs, a call to an AI model, and saved results. You'll need an API key from an AI provider, and usage costs money per request — see how to use LLM APIs.

19. Quiz or trivia game

For: Friends, classrooms, pub quiz nights.
Why it matters: Fun to share and a gentle way to learn scoring and timers.
MVP: Question sets, a timed round, a score screen and a shareable link.

20. Personal finance snapshot

For: People who want a clear monthly picture without a full budgeting app.
Why it matters: Seeing where money goes is the first step to changing it.
MVP: Manually entered income and spending by category, a monthly summary and a chart. Keep it private: add login before you store real data.

Ideas by what they teach you

Idea	New skill it teaches
Subscription tracker	Dates, reminders, totals
Collection catalogue	Image uploads and public pages
Club organiser	Login, roles and RSVPs
Local directory	Search, filters and SEO basics
Job application tracker	Kanban boards and drag and drop
AI writing helper	Calling an AI API and keeping keys secret
Flashcards	Scheduling logic

How to finish a side project

Write one paragraph describing who uses it, the one job, and the data it keeps. That's your first prompt — how to write prompts for AI app builders has more.
Get the core loop working before styling anything.
Share it with one real user within the first week.
Keep a short list of next features and add one per session.
Publish it. A live link you can share is what makes it real.

Building side projects with Mythex

Mythex is a good fit for this kind of project: you describe the app in chat, watch it run in a live preview, add a database when it needs to save data, and publish it to a yourname.mythex.ai link. The Free plan includes daily credits, which suits building a little at a time, and checkpoints let you roll back when an experiment goes wrong. The quickstart in the docs takes you from first prompt to live app, and the templates give you a head start.

Questions

What is a good side project to build with AI?

Something you or people you know would use every week, that fits in a handful of screens: a tracker, a small directory, a booking page for a club, a tool for a hobby. Finishing a small project teaches more than abandoning a big one.

Can a side project make money?

Some do, through subscriptions, one-off payments, sponsorships or ads, but most don't, and that's fine. If earning is a goal, pick an idea where a specific group already spends money on the problem, and validate it before you build much.

How long does it take to build a side project with AI?

A simple first version — a tracker, a directory, a landing page with a form — can work in an afternoon with an AI app builder. Adding login, a database, payments and polish typically takes a few more sessions.

Do I need to know how to code to build these?

No. AI app builders turn a plain-language description into a working web app. Understanding basics like databases and login helps you ask for the right things, and some ideas need API keys from outside services.