15 App Ideas You Can Build This Weekend (With the Prompt for Each)

How to pick an app idea worth building

The best app ideas are small, specific and yours. Small, because a first version you finish beats a big one you abandon. Specific, because "an app for runners" is a category and "a log of my weekly long run with the route and how my knees felt" is an app. Yours, because the person who has the problem is the best judge of whether the app solves it.

Every idea below comes with a first prompt you can paste into Buildra. Each one is sized to work in a first session, and each has an obvious next step once it does.

App ideas for yourself

1. A habit tracker that asks one question a day

One question each evening ("Did you read today?") and a streak calendar. Most habit apps fail by asking too much; this one asks once.

Prompt: "A habit tracker with one daily yes/no question I choose, a streak count and a calendar that colours the days I said yes."

2. A personal recipe box

Paste a recipe, get a clean card with ingredients scaled to the number of servings. Add tags for "weeknight" and "freezer-friendly".

Prompt: "A recipe box where I paste a recipe and it becomes a card with ingredients I can scale by servings, plus tags and search."

3. A reading log with notes

Books you have read, the quotes you kept, and a yearly count. Useful the first time someone asks what you read last spring.

Prompt: "A reading log with book, author, date finished, a rating, my notes and saved quotes, and a count per year."

4. A subscription tracker

Every subscription, what it costs a month, and when it renews next. Sort by renewal date and you will find the one you forgot.

Prompt: "A subscription tracker with name, monthly cost, renewal date and a total per month, sorted by the next renewal."

App ideas for a small business

5. A booking page for a one-person service

A tutor, a barber, a dog walker: a page that shows open slots and takes a booking with a name and phone number, and an admin view of the week.

Prompt: "A booking page for my tutoring with weekly time slots, a form for name and phone, and an admin page that shows the week's bookings."

6. A menu with a QR code

A café or food truck menu that is easy to update the moment something sells out. Print the QR code once; change the menu any time.

Prompt: "A mobile-first café menu with sections, prices and a sold-out switch per item, and an admin page to edit it."

7. A simple invoicing tool

Clients, invoices and a paid or unpaid status. It is not accounting software, and your accountant's tool still keeps the books; this is where invoices are made and tracked. More in build your own QuickBooks alternative.

Prompt: "An invoicing tool with clients, invoices with line items, a paid/unpaid status and a list of what is overdue."

8. A waitlist page for a product that does not exist yet

A headline, a sign-up form and a count of who joined. The cheapest way to find out whether anyone wants the thing.

Prompt: "A launch waitlist page with a headline, a short description, an email sign-up form and an admin page listing sign-ups."

App ideas for a team or a club

9. A shared chore or rota board

Who is on dishes this week, who opens the shop on Saturday. Rotates automatically and shows today at the top.

Prompt: "A rota board for my team that rotates weekly duties between people and shows today's assignments first."

10. An internal request tracker

Requests come in through a form, get an owner and a status, and stop living in a group chat. See internal tools for the bigger version.

Prompt: "A request tracker where anyone submits a request through a form and an admin assigns an owner and a status."

11. A league table for a sports club

Results go in, the table updates itself. Add fixtures and a page per team when the first version works.

Prompt: "A five-a-side league with teams, match results and a standings table that updates from the results."

App ideas for your phone

12. A workout timer for your own routine

Intervals you set, the next exercise in large type, and a sound at each change. Buildra builds cross-platform iPhone and Android apps as well as websites.

Prompt: "A phone app workout timer where I set exercises and intervals, with the next exercise in large type and a sound at each change."

13. A plant watering reminder

Each plant, how often it needs water, and which ones are due today.

Prompt: "A phone app for my plants with a watering interval per plant and a list of which are due today."

Fun app ideas

14. A browser game for one afternoon

A small arcade game: one mechanic, a score and a restart button. Games are the fastest way to learn what "make it feel better" means.

Prompt: "A browser game where you steer a paper plane between moving obstacles, with a score and a restart button."

15. A trivia quiz about your own subject

Your favourite team, your city, your field of work. Ten questions, a score and a share link.

Prompt: "A ten-question multiple-choice quiz about the history of jazz, with a score at the end and a button to play again."

From idea to a published app

Start with the smallest version of one idea, use it for a week, and change it by describing what is wrong. When it is ready, publish it to a buildra.page address, or to your own domain on the Starter plan. If an idea needs a home on the web first, the personal website guide and the portfolio templates are good places to start.