There's no such thing as a guaranteed untouched app idea, but there are plenty of everyday problems that no app solves well: splitting the cost of shared subscriptions fairly, tracking warranties from a photo of a receipt, or helping a family manage an elderly parent's appointments. The ideas below are underserved rather than proven empty, so search for each one before you build. If you find similar apps, read their complaints and build what they miss. You can build a first version without code using an AI app builder such as Greta.sh; its free plan gives you 5 credits a day to start.
We can't promise that nobody has built these, and any list that does is guessing. App stores are huge, and someone has probably tried most ideas in some form. What matters is whether anyone has solved the problem well, for a specific group of people. Below, each idea comes with the problem, a small first version and what to search for.
12 app ideas at a glance
| # | Idea | Who it's for | Build difficulty |
|---|---|---|---|
| 1 | Warranty and receipt keeper | Households | Easy |
| 2 | Shared subscription splitter | Housemates, families | Easy |
| 3 | Parent care coordinator | Adult children of elderly parents | Medium |
| 4 | Lost-recipe family archive | Families | Easy |
| 5 | Home repair history | Homeowners and landlords | Easy |
| 6 | Neighbourhood tool lending | Small communities | Medium |
| 7 | Medication handover log | Shared caregivers | Medium |
| 8 | Group gift organiser | Offices, friend groups | Easy |
| 9 | Kids' activity swap board | Parents at one school | Medium |
| 10 | Freelancer late-payment tracker | Freelancers | Easy |
| 11 | Pet sitter handover notes | Pet owners and sitters | Easy |
| 12 | Volunteer hours passport | Students, nonprofits | Medium |
Everyday problems
1. Warranty and receipt keeper
The problem: when something breaks, nobody can find the receipt or remember when the warranty ends. First version: snap a photo, enter the product and warranty length, and get a reminder before it expires. Search first: "warranty tracker app" and read the reviews. Look for complaints about clunky entry.
2. Shared subscription splitter
The problem: housemates share streaming, internet and software bills, and someone always ends up chasing payments. First version: a list of shared bills, who owes what each month and a reminder. Search first: "shared bills app" and "bill splitting app". General expense splitters exist, so focus on the recurring side they handle less well. Check each service's terms too, since some don't allow sharing outside a household.
3. Parent care coordinator
The problem: siblings managing an elderly parent's care coordinate through scattered messages. First version: a shared calendar of appointments, a list of medications entered by the family and notes on who's doing what. Search first: "family caregiver app". This one needs care with privacy, because it holds health information. Get advice on what applies in your country before you offer it to others.
4. Lost-recipe family archive
The problem: family recipes live in one relative's head or on stained cards. First version: a private family space with photos of recipe cards, typed recipes and the story behind each dish. Search first: "family recipe book app". Recipe apps are common, but private, multi-generation archives are a narrower need.
5. Home repair history
The problem: homeowners forget when the boiler was last serviced and who did the work. First version: a log per home, with photos, costs, contractor details and service reminders. It could also produce a clean history to share when selling. Search first: "home maintenance app". Check how many focus on the history you can pass to the next owner.
Community ideas
6. Neighbourhood tool lending
The problem: everyone owns a drill they rarely use, and no one knows who has a ladder. First version: a private group for one street or building, with an item list, borrow requests and return reminders. Search first: "tool library app". Local "library of things" projects exist, so talk to one about how they run it. Growth depends on getting a whole community on board, so start with one building.
7. Medication handover log
The problem: when several people care for one person, it isn't always clear whether a dose has been given. First version: a shared checklist with times and who gave what. Keep it as a record-keeping tool, not medical advice. Search first: "caregiver medication log". Accuracy and privacy really matter here, so it should only be released with legal and professional input.
8. Group gift organiser
The problem: office collections and group gifts mean a lot of awkward chasing. First version: a gift page with a suggested amount, a list of contributors and a shared card. Search first: "group gift app". If you handle money, a payment provider must take care of it for you.
9. Kids' activity swap board
The problem: parents at one school constantly swap lifts, childcare and outgrown kit in overflowing group chats. First version: a private board for one school, with requests, offers and simple categories. Search first: "school parents app". Safety matters here: keep it invite-only, and don't publish children's details.
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Work and side-income ideas
10. Freelancer late-payment tracker
The problem: freelancers lose track of who owes them and feel awkward chasing it. First version: a list of invoices, due dates and pre-written polite reminders at set intervals. Search first: "invoice reminder app". Full invoicing tools exist, so the gap is a simple add-on for people who don't want to switch. See our micro SaaS ideas for similar business-focused ideas.
11. Pet sitter handover notes
The problem: instructions for a pet sitter are spread across long text messages. First version: a shareable page with feeding, medication, vet contacts and house notes, plus daily check-ins from the sitter. Search first: "pet sitting app". Most focus on finding a sitter, not on handing over instructions.
12. Volunteer hours passport
The problem: students and volunteers need signed proof of their hours, usually on paper. First version: a log of hours, plus a link so that a coordinator can approve them, and a shareable record. Search first: "volunteer hours tracker". Some tools are sold to organisations, so there may be room for one aimed at the individual volunteer.
How to check whether an app idea already exists
Do this before you build anything. It takes under an hour.
- Search app stores and the web with three or four different descriptions of the problem, not just your name for it.
- Search Reddit and forums for people asking "is there an app that...". Those threads show real demand and existing options.
- Read one-star and three-star reviews of the closest competitors. The complaints are your feature list.
- Check Product Hunt and similar directories for past launches, including ones that have since closed.
- Ask why it doesn't exist. A gap may mean an opportunity, or it may mean no one will pay, the law gets in the way or the data isn't available.
Finding competitors isn't bad news. It shows that people want it. A narrower version for one group, or a much simpler version, is often a better starting point than a brand-new category with no buyers.
How to turn an idea into an app
Talk to five people who have the problem, then build the smallest useful version. Our pre-build checklist walks you through the plan, and how to make an app with AI shows the prompts step by step. A first prompt for idea 1 could look like this:
Build a warranty tracker. Users sign in and add a product with a name, purchase date, warranty length and a photo of the receipt. Show a list sorted by which warranty ends soonest, and email the user 30 days before a warranty expires. Each user sees only their own items. Clean design that works well on phones.
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 generates web apps that work in a phone's browser, so if you need an App Store listing, check native options first. See PWA vs native apps.
For more ideas, see apps to make, ranked by difficulty, web app ideas, AI app ideas and app ideas for students.
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
Are there any app ideas that haven't been made yet?
Probably some, but it's hard to prove, because so many apps exist. A more useful question is which problems no app solves well for a specific group. Those gaps are easier to find and test.
How do I know if my app idea already exists?
Search app stores and the web using several descriptions of the problem, look for "is there an app that..." threads on Reddit, and check directories like Product Hunt. If you find close matches, read their reviews to see what they miss.
Should I build an app if something similar exists?
Often, yes. Existing apps prove that there's demand. You can win by serving one group better, keeping it simpler or fixing the main complaint in competitors' reviews. Don't copy their branding or content, though.
What should I do with an app idea if I can't code?
Validate it by talking to people who have the problem, then build a small first version with an AI app builder or a no-code tool. You don't need a developer to find out whether anyone wants it.
Can someone steal my app idea?
It's possible, but it's rarely the main risk. Execution matters much more than the idea, and talking to potential users is worth more than secrecy. If your idea involves a real invention, ask a qualified lawyer about protecting it.
Which app ideas make money?
Ideas that solve a recurring problem for people or businesses who already pay to deal with it. Consumer ideas like those above are often harder to charge for. See app ideas that make money for ideas chosen with revenue in mind.
