The best web app ideas to start with solve one clear problem and don't need an app store: a client portal, a booking page, an expense splitter, a habit tracker or an internal dashboard. For a first project, pick something simple you would use yourself. For a business, pick a narrow problem that people already spend time or money on. Web apps run in any browser and work on phones, and with an AI app builder such as Greta.sh you can build one from a description; the free plan gives you 5 credits a day to start.
Below are 15 ideas grouped by difficulty, each with its core features and a note on who it's for. If you're not sure what counts as a web app, start with our guide to what a web app is.
All 15 web app ideas at a glance
| # | Idea | Difficulty | Needs sign-in? | Could make money? |
|---|---|---|---|---|
| 1 | Tip and bill splitter | Easy | No | Rarely |
| 2 | Link-in-bio page builder | Easy | Yes | Yes |
| 3 | Habit tracker | Easy | Yes | Sometimes |
| 4 | Personal expense tracker | Easy | Yes | Sometimes |
| 5 | Poll and vote maker | Easy | Optional | Sometimes |
| 6 | Group trip planner | Medium | Yes | Sometimes |
| 7 | Appointment booking page | Medium | Yes | Yes |
| 8 | Client portal | Medium | Yes | Yes |
| 9 | Job board for one niche | Medium | Yes | Yes |
| 10 | Internal request tracker | Medium | Yes | Yes |
| 11 | Recipe and meal planner | Medium | Yes | Sometimes |
| 12 | Online course site | Hard | Yes | Yes |
| 13 | Local services marketplace | Hard | Yes | Yes |
| 14 | Niche community forum | Hard | Yes | Sometimes |
| 15 | AI document assistant | Hard | Yes | Yes |
"Difficulty" reflects how much data, how many user types and how many edge cases are involved, not how long the code takes to generate.
Simple web app ideas for beginners
These have one user type and a small amount of data. They're good for learning how to build and test an app.
1. Tip and bill splitter
Enter a total and the number of people, then split it evenly or by item. Core features: a calculator, a shareable result link. Why start here: there's no database or login, so you can finish it in one session and see the whole process through to publishing.
2. Link-in-bio page builder
Users create a simple page with their links and a photo, and share a short URL. Core features: sign-up, a page editor, public pages, click counts. Why it's useful: it teaches public and private views, and there's a clear paid upgrade in custom themes or analytics.
3. Habit tracker
Users define daily habits and check them off, then see streaks. Core features: sign-in, habits, daily check-ins, a streak view. Why it's useful: your first real data model, and something you can use daily yourself. We've also written up a habit tracker built from a single prompt.
4. Personal expense tracker
Log spending by category and see a monthly summary. Core features: sign-in, an expense form, categories, a chart. Why it's useful: it teaches charts and summaries. Keep the first version to manual entry rather than connecting to bank accounts, which adds security and compliance work.
5. Poll and vote maker
Create a question, share a link and watch votes come in. Core features: poll creation, one vote per person, live results. Why it's useful: it introduces sharing and preventing duplicate votes. Our real-time voting app guide goes deeper.
Web app ideas with real users
These have more than one type of user or real coordination between people. They need attention to permissions.
6. Group trip planner
A group shares an itinerary, votes on options and splits costs. Core features: invites, a shared itinerary, polls, expense splitting. Who it's for: friend groups currently using a messy group chat and a spreadsheet.
7. Appointment booking page
Clients pick a service and a time; the owner manages a calendar. Core features: services, availability, booking, confirmation emails, an admin view. Who it's for: tutors, consultants, salons. Our guide on how to create a booking website has a full prompt.
8. Client portal
Clients log in to see project status, files and invoices. Core features: two user roles, per-client data, file sharing, messages. Who it's for: agencies, accountants and freelancers who are tired of email threads. This is a strong one to sell, because the buyer already has the problem and a budget.
9. Job board for one niche
Employers post jobs in one field or region and candidates apply. Core features: listings, search and filters, applications, paid posts. Who it's for: a specific community that general job sites serve poorly. Our job board guide covers the build.
10. Internal request tracker
Staff submit requests, such as IT or purchasing, and a manager approves and tracks them. Core features: a request form, statuses, approvals, notifications. Who it's for: small teams replacing a spreadsheet. See how ops teams replace spreadsheets with internal apps.
11. Recipe and meal planner
Save recipes, plan the week and generate a shopping list. Core features: a recipe database, a weekly calendar, a combined shopping list. Who it's for: home cooks and families. It's useful as a project, and harder as a business because free options are plentiful, so a specific audience such as a dietary need gives it a better chance.
Got an idea? Build it now!
Just start with a simple prompt. No coding required: Greta.sh turns your idea into a working app in minutes.
Web app ideas that are full products
These are real businesses. Expect more users, more edge cases and more ongoing work.
12. Online course site
Instructors publish lessons and students pay and track progress. Core features: courses, video lessons, payments, progress tracking. Watch out for: video hosting costs and refund handling. See how to build an online course platform.
13. Local services marketplace
Customers find and book local providers, such as dog walkers. Core features: two sides of users, listings, bookings, payments, reviews. Watch out for: getting both sides at once. Start in one town with one service. Our two-sided marketplace guide explains how.
14. Niche community forum
A place for one group to ask questions and share knowledge. Core features: profiles, topics, replies, moderation. Watch out for: empty forums attract no one, so seed it with real discussion first. Our guides on building a forum website and making a social media app cover related ground.
15. AI document assistant
Users upload documents from a specific domain and get summaries or extracted details. Core features: uploads, an AI step, results with the source text shown beside them, usage limits. Watch out for: accuracy and privacy. Greta.sh connectors include OpenAI, Claude and Gemini for AI steps in flows. See our list of AI app ideas for more.
How to choose the right idea
- To learn: pick ideas 1 to 5. Finishing something small teaches you more than abandoning something big.
- To build a portfolio: pick something you can demo with sign-in and real data, such as ideas 3, 6 or 7.
- To make money: pick ideas 7 to 10, where a business already feels the problem. See app ideas that make money and our micro SaaS ideas.
- For a school project: see app ideas for students.
Before you build, ask three questions. Who specifically will use this? What do they do today instead? Would you use it yourself, or can you talk to five people who would?
How to build a web app idea without coding
Start with one sentence on what it does and for whom, then list the users, data and main flow. A first prompt for idea 8 might be:
Build a client portal for a small marketing agency. Two roles: agency staff and clients. Staff create client accounts and projects, and upload files and status updates to each project. Clients sign in and see only their own projects, files and updates, and can leave comments. Add a dashboard for staff that shows all projects by status. Clean design that works well on phones.
Our step-by-step guide on how to build a web app takes you from there to launch.
On Greta.sh, the free plan gives you 5 credits a day but cannot deploy. Deployment and custom domains start on Starter (a $5/month welcome offer, normally $20/month). Pro (a $20/month welcome offer, normally $50/month) adds the Database, Flows and GitHub version control. Greta.sh builds its own database for each app rather than sitting on top of an existing production database.
Got an idea? Build it now!
Just start with a simple prompt. No coding required: Greta.sh turns your idea into a working app in minutes.
FAQ
What is a good web app idea for beginners?
A tip splitter, habit tracker or expense tracker. They have one type of user and little data, so you can finish them and learn the full process of building, testing and publishing. Pick one you would actually use.
What are some simple web app ideas?
Simple ideas include a bill splitter, a poll maker, a habit tracker, a link-in-bio page and a personal expense tracker. Each does one job for one type of user, and none needs complicated permissions.
What web apps make money?
Web apps that solve a recurring business problem are the most likely to make money: client portals, booking systems, niche job boards and internal tools for specific trades. Consumer apps can work too, but they usually need a much larger audience.
What's the difference between a web app and a mobile app?
A web app runs in a browser on any device, with nothing to install, and you can update it instantly. A native mobile app is installed from an app store and can use more of the phone's features. Most first projects can start as a web app. See PWA vs native apps.
Can I build a web app without coding?
Yes. An AI app builder can generate one from a plain-English description, and no-code tools let you assemble one visually. You still need to test it, especially sign-in and permissions, before real users rely on it.
How long does it take to build a web app?
A simple idea can work within a session or two with an AI app builder, while a marketplace or course platform takes much longer, mostly in testing and refining. Our guide to how long it takes to build an app has more detail.
