Olune

Before you build · Stage 1: pick the idea

My app idea already exists. Do I keep building or stop?

Finding a competitor is normal, and often good news. This page shows when it is a stop sign, how to check any app idea in five searches, and what to do if yours already exists.

Updated

Key takeaways

  • Competitors usually mean demand. Paul Graham (2012) and YC's Jared Friedman add one condition: you can name what the existing apps miss. SaaStr's Jason Lemkin asks whether any competitor is at scale.
  • Our call (editorial): stop when free tools from big companies own page one (Zoho, Canva, Adobe and Wise for freelancer invoices) or when the platform owner ships the feature (Gemini in Chrome summarizes pages).
  • Narrowing is not an automatic fix: for 17 of 19 common app ideas, the narrower version still showed 3 or more vendors selling exactly that (Google US, October 2026).
  • Visible gaps draw other builders fast: Mealime set 2026-10-21 as its shutdown date, and by 2026-10-13 eight of Google's US top 10 results for its shutdown were other apps' pages, the earliest dated 2026-09-03.
  • Olune's competitor check covers Google and Product Hunt only. Search the App Store, Google Play and the Chrome Web Store yourself with the copyable strings below.

Good sign or stop sign

Graham and Friedman treat competitors as a usual sign of demand. Lemkin says small competitors always exist and only one at scale should worry you. The right column, and rows 3 and 5 of the middle column, are our editorial read.

Good sign or stop sign
What you foundA good sign whenA stop sign when
Other apps already do itYou can name what they overlook. Graham calls a crowded market a good sign, as long as you can point to that.You cannot say in one sentence what they miss.
How big the competitors areNone is at scale. Lemkin's 2-60-Google rule: if two people each spend 60 minutes on Google and find no competitor at scale, stop worrying.One is at scale and free, or the feature is built into the platform your app runs on.
What users say about themPast-year threads name an existing app and say what it does badly.Competitors exist and nobody complains about them. Recommendation threads and "I built a free X" posts are not complaints.
Who tried beforeEarlier attempts failed for a reason you can name and remove (Friedman, through a dated summary of his talk).Many people tried for years and you cannot name what stopped them. YC calls these tarpit ideas.
The narrower versionA search for your exact audience shows no tool built for it.The narrower search is crowded too.
iPhone or Android appYour app is clearly different from what the store already has.It is another variant of a crowded category. Apple's guideline 4.3(b) and Google Play's spam policy both turn those away.

Middle column, rows 1, 2, 4 and 6: Graham (2012), Lemkin on SaaStr, Friedman through a summary dated 2026-05-24, and Apple and Google Play rules checked 2026-10-13. Rows 3 and 5 of the middle column and the whole right column: editorial.[1], [2], [3], [4], [5], [6]

Six stop signals, with examples

Each signal comes with a case we checked on Google (US, English) on 2026-10-13. Counts are lower bounds and go stale, so re-run the searches before you decide.

  1. Free tools from large companies own page one. Search "invoice generator for freelancers" and 7 of the top 10 results are free generators, including Zoho, Canva and Adobe Express, plus a free template from Wise (Google US, October 2026). Large companies use free tools like these to bring people to paid products (editorial reading). Two freelancer threads we cite are about late payments, which a nicer invoice does not fix (editorial).[9], [10], [11]
  2. The platform owner ships it. Gemini in Chrome summarizes pages, Google Meet takes notes, and Pinterest schedules Pins. When the company that owns the platform builds your feature in, your app competes with a built-in option many of its users already have: included for Pinterest business accounts, part of eligible Workspace editions and Google AI plans for Meet, and rolling out by region for Gemini in Chrome (as of October 2026). Details are in When the platform owner ships it.[12], [16], [18]
  3. The complaint you would fix has already been answered. Splitwise's help center says it added a daily expense limit for free users. On 2026-10-13, 6 alternative apps' own pages ranked in Google's US top 10 for "free splitwise alternative no limits". See When a gap opens, other builders arrive fast.[23], [25]
  4. The narrower version is crowded too. On our app ideas page, the narrower version of 17 of 19 common ideas still showed at least 3 vendors selling exactly that. Example: "ai progress notes for therapists" returned 8 dedicated tools in the top 10, including Mentalyc, Upheal and SimplePractice (Google US, October 2026).[31], [32]
  5. It looks like a tarpit. Friedman calls an idea many founders have tried for years without success a tarpit. His example in the talk is an app for friends to plan meetups: founders have pitched it to YC for about 20 years, and none has made it work. Before starting one, find everyone who tried, talk to them, and name what stopped them. If you cannot, you have no plan to get past it.[2], [3]
  6. Competitors exist and nobody complains about them. If your complaint search returns recommendation threads and launch posts, you have found other builders, which is supply. Demand shows up as complaints. A past-year Reddit search for "invoice app" complaints returned 4 top-10 results titled "I made" or "I built" and 3 that ask for help or complain, one about what invoicing apps cost (Google US, 2026-10-13). Count the second kind, not the first.[33]

How to check if an app idea already exists: five searches

Run these five searches before you write the first prompt in Cursor, Claude Code, Lovable or Bolt. Each one is a single Google search, and each answers one question.

  • Why bother. In r/vibecoding, a post titled "me everytime" describes the loop: start building, find a near-identical app halfway through, quit, repeat. A r/SideProject reply notes that people assume an idea they have not seen does not exist, and never check. Builders ask the same question in r/iOSProgramming and r/startups, and at least two Claude skills for this job have been posted in r/claudeskills. These searches are a free first pass before you spend any credits.[27], [45], [44], [28], [29], [30]
  • How to count. Count distinct products, not pages: Product Hunt has separate reviews and awards pages for one product, and App Store results include other countries' stores unless you add /us. Google documents the site: and after: operators on its search help page.[8]
  • What normal looks like. For comparison, the 19 ideas on our app ideas page plus the Chrome summarizer below had 3 to 9 product pages in Google's top 10 for the obvious search (median 6) and 8 to 19 distinct Product Hunt products in the first 20 site-search results (Google US, October 2026). In that range, the idea is crowded and the seam has to carry it.[31], [14]

The five searches run on one idea: habit tracker

One idea from our app ideas page, run through all five searches. Search 3 uses the App Store version.

The five searches run on one idea: habit tracker
SearchWhat we counted
1. habit tracker app5 to 6 of the 9 results were habit apps (two same-day checks). The rest were app roundups.
2. site:producthunt.com/products habit tracker16 distinct products in the first 20 results
3. site:apps.apple.com/us habit tracker17 distinct US App Store listings. Google returned only 17 results across two pages.
4. adhd habit tracker appStill crowded: pages for Unique (Google Play), Focus Bear and Lunatask, each aimed at people with ADHD, plus a Notion template and app lists
5. site:reddit.com "habit tracker" (alternative OR "looking for" OR frustrating) after:2025/10/134 requests for app recommendations, 2 app roundups, 2 "I built" posts and 2 threads about quitting trackers. No title complains about a named app.

Google US, checked 2026-10-13. The counts for searches 1, 2 and 4 come from our app ideas page; we ran 3 and 5 for this example. Our read (editorial): crowded on every search, and past-year Reddit shows people asking for an app rather than naming one that fails them, so there is no visible seam yet.[31], [46], [47], [48]

When the platform owner ships it

If your app lives inside someone else's product (a browser, a meeting tool, a social network), search that company's help center and developer docs first. Three cases from our checks:

  • Chrome summarizer extensions vs Gemini in Chrome. Google's Gemini in Chrome page says Gemini summarizes articles, pages or threads in Chrome on desktop, and it describes Gemini on Android and, starting soon, in the Chrome app on iOS. It is for users 18 and over and is rolling out by region (as of October 2026). Chrome's Summarizer API, built into desktop Chrome from version 138, lets any developer add summaries too. "ai summarizer chrome extension" showed 5 dedicated extensions in the top 10, plus Chrome's own API page. Site searches found 13 Product Hunt products and 18 Chrome Web Store listings in the first 20 results (Google US, October 2026). One r/chrome_extensions builder reports 10 published extensions with basically zero installs. Our call (editorial): skip as a business, fine to learn on.[12], [13], [14], [15]
  • AI meeting notes vs Google Meet. Google Meet's "Take notes for me" writes notes to a Google Doc on eligible Google Workspace editions and Google AI plans (as of October 2026). "ai meeting notes" showed 6 dedicated tools in the top 10, including Otter, Read.ai and Notion, plus Google's own admin guide for Meet's notes, and a site search found 17 Product Hunt products in the first 20 results (Google US, October 2026). Our call (editorial): skip.[16], [17]
  • Pinterest schedulers vs Pinterest. Pinterest's own "Schedule Pins" help page ranks first for "pinterest scheduler" (Google US, October 2026). Business accounts can schedule Pins up to 30 days ahead, with up to 10 queued at once (as of October 2026). Users who need more than that are served by Tailwind, Buffer, Later, Planable and others, which rank on the same page. Our call (editorial): skip.[18], [19]
  • How to check your own idea. Search the platform's help center for your feature (for example, site:support.google.com plus the feature name) and read its developer changelog.

When a gap opens, other builders arrive fast

A shutdown or a new limit on a popular app looks like an opening. Other builders see it too.

  • Mealime shutdown. Mealime's homepage, checked 2026-10-13, gave 2026-10-21 as its shutdown date. Its closing page says Albertsons Companies, its owner since 2021, points users to Meals Hub in Albertsons Companies grocery apps and websites. On 2026-10-13, 8 of Google's US top 10 results for "mealime shutting down 2026" were pages from other recipe and meal-planning apps courting Mealime users. The earliest date shown on any of them is 2026-09-03.[20], [21], [22]
  • Splitwise free-tier limit. Splitwise's help center says it added a daily expense limit for free users, without giving a number or a date, and its Pro page sells unlimited daily expenses (both checked 2026-10-13). In the past year, at least 9 Reddit posts presented a Splitwise alternative the poster had built (our count; some may be one builder posting twice). On 2026-10-13, 6 alternative apps' own pages ranked in Google's US top 10 for "free splitwise alternative no limits".[23], [24], [26], [25]
  • What this means (editorial). By the time a gap is easy to see, other builders with the same AI tools see it too. If you go after one, move quickly and aim at a group the crowd ignores: read what leaving users ask for in the old app's subreddit and store reviews, then run the five-search check on that version.

Finding the seam

A seam is one thing the existing apps do badly for one group of people, which that group says in public. It is what lets a crowded idea work.

  1. Step 1: Pick one group, not everyone

    Choose a group you can describe and reach: solo plumbers, therapists in private practice, small architecture firms. The generic version of most app ideas is where the free tools and the big players already sit.

  2. Step 2: Find complaints about a named app

    Run search 5 with that group's words. Useful complaints name an app and what is wrong with it: it joins the call as a visible bot, or it is built for enterprise sales teams when the buyer is a small firm. Recent low-star store reviews of the top three apps are a second source.[34], [35], [38]

  3. Step 3: Write the seam as one sentence

    "For <group>, <app> fails at <job> because <reason>, and they say so here: <links>." If you cannot fill every blank, you do not have a seam yet. It is Paul Graham's test in fill-in form: phrase the idea as something the incumbents overlook.[1]

  4. Step 4: Check the seam itself

    Run searches 1, 2 and 4 again with the seam in the words, because seams get taken too. People in r/NoteTaking and r/msp asked for AI meeting notes without a visible bot. A r/SaaS builder had already posted an "invisible" meeting notes tool, and Product Hunt lists a Google Meet note taker that joins without a bot (Google US, October 2026).[34], [35], [36], [37]

  5. Step 5: Decide

    If the seam holds and people complain about it in the past year, build the smallest version that fixes that one thing. If it does not, treat the idea as practice. Our validate before you build guide covers the checks that come next.

Two narrowed ideas without a crowd yet

Across the common app ideas we checked, two narrower versions showed no crowd of tools built for that exact group on Google's first page. Both are editorial "narrow-it" calls, not Olune runs, and both still carry risks. The full cards are on our app ideas page.

  • RFP responses for architecture and engineering firms. The generic "ai proposal generator" search showed 8 dedicated tools, most free per their page titles. "ai rfp response software for architects" showed general RFP vendors and vendor lists. At number 2 was a r/Architects post by a builder who had already made an RFP tool for architecture and engineering firms (Google dated it about six months before 2026-10-13). No architecture-specific product page ranked (Google US, October 2026). That builder says existing RFP platforms are built for enterprise sales teams. Risks: at least one direct entrant already exists (another r/Architects poster built an RFP tool for their own firm), small firms may not pay, and a general vendor can add a template for architects. First find out whether that builder found paying firms, and whether firms already pay someone for RFP work.[39], [40], [38], [49]
  • Google-review requests for one kind of contractor. Testimonial widgets are crowded: 5 dedicated tools in the top 10 for "testimonial collection tool". "google review request app for contractors" showed 2 dedicated tools, with guides, Facebook group posts and Reddit threads filling most of the rest (Google US, October 2026). In r/smallbusiness, one poster says asking at the end of every transaction gets "Maybe 1 in 20" to leave a review. Risk: field-service suites and review platforms already offer review requests, so check what the trade pays for today.[41], [42], [43]

Check your idea with the seam in it

Describe your app, who it is for, and the app you would beat and why. Olune scores it free. A free sign-in then runs the research: search demand, public complaints found through Google, and competitors from Google and Product Hunt. You get Cook it, Sleep on it or Kill it, with the reasoning. 3 a day, no card.

Free score, no account. The research needs a free sign-in.

Found a twin? Check before you quit or keep going

Type your app idea and the thing you think the existing apps miss, or leave the box empty to try the architecture-firm RFP example from this page. A free sign-in runs the research, and Kill it is a normal answer. 3 a day, no card.

Free score, no account. The research needs a free sign-in.

Common questions

What should I do if my app idea already exists?

Keep going only if you can name what the existing apps miss for a specific group and find people in that group complaining about it in the past year. Run the five-search check on this page first. If both tests fail, build it to learn or move on.

Is a crowded market bad for a new app?

Not by itself. Paul Graham calls a crowded market a good sign if you can say what the incumbents overlook, and SaaStr's Jason Lemkin says what matters is whether any competitor is at scale. It turns bad when big companies give the tool away, the platform owner ships it, or nobody complains about the existing apps.

How do I check if my app idea is already on the App Store?

Search Google for site:apps.apple.com/us plus what your app does, then search the App Store itself in a buyer's words. For Android, use site:play.google.com/store/apps. Count distinct apps, not pages, and read the recent low-star reviews of the top three, where seams show up.

Will Apple reject my app if similar apps exist?

It can, if your app is indistinguishable from what is already widely available. Apple's guideline 4.3(b) accepts new apps in established categories such as dating, flashlight and wallpaper only if they are meaningfully different or improved (as of October 2026), and Google Play bans apps that merely repeat an existing experience.

Can I copy an existing app?

You can build an app that does the same job, since the US Copyright Office says copyright does not protect ideas, but you cannot copy its code, text, images or design, and its name and logo may be trademarks. Apple's guideline 4.1(a) also rejects copies with small changes to the name or UI. This is general information, not legal advice.

Should I stop if I find a competitor halfway through building?

Not automatically. Pause the build, run the five searches, and apply the seam test: if you can name what the competitor misses and find people complaining about it, finish a smaller version aimed at that gap. If you cannot, stopping now costs less than stopping after launch.

Does Olune tell me if my app idea already exists?

Partly. After a free sign-in, its research lists up to 6 competitors from 3 Google searches and 1 Product Hunt search. It does not search the App Store, Google Play or the Chrome Web Store, so check those by hand.

How do I know if my app idea is already taken?

Run five Google searches: the obvious one, Product Hunt, the store your app would ship in, the narrower version, and past-year Reddit complaints. If they turn up products doing the job, it is taken in the plain sense, and the real question is whether you can name what those products miss.

Sources

Each number in brackets on this page points here. Prices and limits change; the date is when we read the page.

  1. [1]Paul Graham, "How to Get Startup Ideas" (November 2012) · accessed
  2. [2]Summary of Jared Friedman's YC Startup School talk "How to Get and Evaluate Startup Ideas" (personal blog on mit.edu, dated 2026-05-24; a summary, not YC's own text) · accessed
  3. [3]Startup School, "How to Get and Evaluate Startup Ideas" (Jared Friedman, video; competition and tarpit points checked against a transcript 2026-10-13) · accessed
  4. [4]Jason Lemkin, SaaStr, "How Do You Know If Your Startup Idea Already Exists?" (undated) · accessed
  5. [5]Apple, App Review Guidelines (4.1 Copycats, 4.3 Spam) · accessed
  6. [6]Google Play Console Help, Spam policy (repetitive content) · accessed
  7. [7]US Copyright Office, "What Does Copyright Protect?" FAQ · accessed
  8. [8]Google Search Help, "Refine Google searches" (site:, before: and after: operators) · accessed
  9. [9]Google search, US, "invoice generator for freelancers", top 10 · accessed
  10. [10]r/Freelancers thread: following up on unpaid invoices · accessed
  11. [11]r/Solopreneur thread: why freelancers struggle with late payments · accessed
  12. [12]Google, Gemini in Chrome overview · accessed
  13. [13]Chrome for Developers, "Summarize with built-in AI" (Summarizer API; published 2024-11-11, updated 2025-07-30) · accessed
  14. [14]Google search, US, "ai summarizer chrome extension", top 10; plus site:producthunt.com/products and site:chromewebstore.google.com searches, first 20 results · accessed
  15. [15]r/chrome_extensions thread: 10 extensions published, basically zero installs · accessed
  16. [16]Google Meet Help, "Take notes for me" · accessed
  17. [17]Google search, US, "ai meeting notes", top 10; plus site:producthunt.com/products search, first 20 results · accessed
  18. [18]Pinterest Business Help, "Schedule Pins" · accessed
  19. [19]Google search, US, "pinterest scheduler", top 10 · accessed
  20. [20]Mealime homepage (shutdown banner) · accessed
  21. [21]Mealime, closing page · accessed
  22. [22]Google search, US, "mealime shutting down 2026", top 10 · accessed
  23. [23]Splitwise help center, "Why am I seeing an expense limit?" · accessed
  24. [24]Splitwise Pro page · accessed
  25. [25]Google search, US, "free splitwise alternative no limits", top 10 · accessed
  26. [26]Google search, US, past year: Reddit posts presenting a built Splitwise alternative · accessed
  27. [27]r/vibecoding thread: "me everytime" (finding a competitor mid-build, 2026-04-19) · accessed
  28. [28]r/startups thread: where to check if an idea already exists · accessed
  29. [29]r/claudeskills post: a Claude skill that checks whether an idea already exists · accessed
  30. [30]r/claudeskills post: a Claude skill pitched on killing app ideas before you build · accessed
  31. [31]Olune, vibe coding app ideas: Google US checks of 20 common idea types (counts, narrowed searches) · accessed
  32. [32]Google search, US, "ai progress notes for therapists", top 10 · accessed
  33. [33]Google search, US, past year: Reddit complaints about invoice apps · accessed
  34. [34]r/NoteTaking thread: an AI note taker that does not join as a bot · accessed
  35. [35]r/msp thread: AI note takers with botless features · accessed
  36. [36]r/SaaS post: building an "invisible" AI meeting notes tool · accessed
  37. [37]Product Hunt, MeetNote (listing title as shown in Google results) · accessed
  38. [38]r/Architects post: an AI RFP tool built for architecture and engineering firms (Google showed it as about six months old on 2026-10-13) · accessed
  39. [39]Google search, US, "ai proposal generator", top 10 · accessed
  40. [40]Google search, US, "ai rfp response software for architects", top 10 · accessed
  41. [41]Google search, US, "testimonial collection tool", top 10 · accessed
  42. [42]Google search, US, "google review request app for contractors", top 10 · accessed
  43. [43]r/smallbusiness thread: getting customers to leave Google reviews · accessed
  44. [44]r/iOSProgramming thread: developing an app when a similar one exists · accessed
  45. [45]r/SideProject thread: "Everybody is doing different color of the same app" · accessed
  46. [46]Google search, US, "habit tracker app", top 10; plus site:producthunt.com/products habit tracker (first 20) and "adhd habit tracker app" (top 10) · accessed
  47. [47]Google search, US, site:apps.apple.com/us habit tracker, first two pages · accessed
  48. [48]Google search, US, past year: Reddit threads on habit trackers (search 5 string) · accessed
  49. [49]r/Architects post: a tool built to speed up the poster's own firm's RFP responses · accessed

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