One phone replaces a €500 scoring machine: a small Czech team's dart app squeezes into an already crowded market with "free"

Darteer lets you prop up your phone in front of a dartboard and it automatically recognizes every dart and works out the score. That part is free forever; online play costs €15.99 a year. It launched in 2026 in July, and in four months it has around 19K Android installs. Dart fans on Facebook groups and YouTube keep comparing it with paid rivals. It gets noticed mainly because of its price, but the category is crowded with hardware giants, official licensed apps and several indie developers. If you want to follow it, there's little room left in darts itself. What you can learn is the playbook.

A "much cheaper" post

Darteer hit the UK App Store only 12 days ago, in July 2026 23. A user in the Facebook group "Darts Advice, Tips, and Discussion." posted about it:

fantastic little app, £2 a month which includes online play. Dartsmind just cheaper. A whole lot cheaper lol

The post drew 28 comments, and almost everyone compared it with Dartsmind. Dartsmind was the first to do camera-based scoring, charges an annual fee (about $14.99 / £12.99), and requires extra coins for online matches.

A month later, on Sep 1,1,780, Penguin Darts, a UK channel with 1.99 subscribers, posted a review titled "The £500 OMNI Killer?" The OMNI is a camera-based scoring system sold by Target for about £1.99. The video description had just one line: "Darteer is a £500 a month AI auto-scoring app. Can it match the OMNI, or even beat it?" By November, the video had about 5,300 views.

Almost every post or video that mentions it talks about price.

What it is

It's made by Darteer.ai s.r.o. in Prague, which has only this one app. You prop a phone or tablet in front of an ordinary steel dartboard, calibrate once, and start throwing. An on-device vision model works out where each dart lands and what it's worth. No electronic board, no hardware. Game modes include 501 / 301, Cricket, Around the Clock and Shanghai. A second phone can connect over Bluetooth as a second camera, or act as a remote.

The price comparison site dartsautoscoring.com added it in Oct 25. Sorted by three-year total cost, Darteer comes to €48 for three years, in the cheapest tier. DartsOn, with nearly identical features, costs about €75 over three years.

How big is it really?

Not very big.

• iOS: After almost four months on the App Store, it has 32 ratings worldwide (10-28 had 31; in 7 days it added only 2 more), of which 16 are from the Czech Republic and 11 from Germany.
• Android is the main channel: Google Play installs rose from 10-29 at 16,517 to 11-06 at 19,126, adding 2,609 in a week. In the sports free chart it ranks #35 in Poland and #50 in Germany (11-06).
• Don't take the Top Grossing chart too seriously. On the iOS Sports Top Grossing chart it's #12 in Czechia, #19 in Hungary and #25 in Slovakia (11-06). These markets have a low bar: a few subscriptions a day can get you into the top 20, so it only tells you people are paying, not how much.

Why users pick it

The store reviews say it plainly:

• "Nejlevnější opravdu funkční!" (the cheapest dart scoring app that actually works) "Features other apps charge for are free here." (Czech store, 7-15)
• "Preis-Leistung überragend" (outstanding value for money) "Even if one dart blocks another, pulling them in order still scores it right." (German store, 9-15)
• "in der Preisklasse (jährlich<20€) mit Abstand die beste App" (by far the best app in the under €20/year bracket) (German store, 8-20)
• "I have no idea how this app isn't talked about much! It's on par with Dartsmind if not better." (UK store, 8-08)

There are problems, mainly two kinds. One is recognition: "Barely recognises the darts, keeps needing manual fixes, deleted it" (German 1-star, 10-18). A UK user also said that after one update, each round only registers the first dart and auto-logs the other two as 0 (9-03). The other is finding online opponents: "Community is still small, hard to get matched" (Czech store, 8-15). There are also Reddit r/Darts complaints that you can't try online games without buying a subscription.

The second is the worse one. Pro is built around online play, and online play needs an opponent pool. An opponent pool is exactly what the established DartCounter and the newcomer Autodarts have the most of.

Where users come from

I couldn't find any sign of paid acquisition (no related TikTok videos, nobody discussing it on X). The visible sources are all within the dart community:

1. Czech local creators got there first. The developer is Czech. In the month of launch, the Czech channel "SVĚT ŠIPEK | MATY" posted a video titled "darteer – the Czech app every dart player must try!", with about 5,400 views. Half of the iOS ratings come from Czechia.
2. UK dart YouTube. Besides Penguin Darts, To Throw First ran three videos on it, with price-led titles: "26p a month auto-scoring app", "Move Over Autodarts Lens", plus a three-way comparison, one of which has 5,241 views. One channel posting three videos on a new app in a row looks like a partnership, but I didn't see any sponsorship disclosure (unverified). Penguin Darts' video carries a product affiliate link, but it's for a dartboard, not this app.
3. Word of mouth in Facebook groups and on Reddit, which is the post at the top of this section.
4. Price comparison sites. Sorted by three-year total cost among the 35 systems listed on dartsautoscoring.com, it wins easily.
5. Store search (inferred). The title is literally "Automatic Dart Scorer", targeting the phrase users would search.

A few videos with a few thousand views each, plus a few groups, brought in nearly 20,000 installs on Android. Dart players cluster together and often ask in groups "what do you score with?", and that matters a lot.

Who it's competing with

It's crowded. dartsautoscoring.com lists 35 auto-scoring systems, 13 of which need only a phone or tablet.

Darteer has no feature exclusive to it: dual cameras, offline and on-device recognition are all matched by DartsOn. What's unique is only the pricing combination: unlimited free scoring, with the cheapest Pro. This spot is open to anyone. Autodarts has PDC backing and could lift its free 5-game cap at any time; DartsOn only needs to change its free allowance to catch up.

If it were you

C: Worth studying, but don't copy it in darts. If you want to build a dart scoring app, your competitors are Autodarts, a big player with official licensing; DartCounter, with millions of legacy users; and three or four indie developers with the same features. Even Darteer itself can't fill its online matches. What you can take is its playbook: find a niche hobby where hardware is expensive and existing apps charge for it, make the core AI scoring free, and let "so much cheaper" become something users say for you.

Who it suits: a team of 1–2 people who can build on-device vision models (local recognition, calibration, occlusion handling). Ideally you play the niche sport yourself, or speak a minority language and can first build a foothold in your home community.

Who it doesn't suit: people who want to build for darts, or who want English as the main market; people counting on online play and community subscriptions without a way to cold-start an opponent pool; people who can only wrap LLM APIs and can't do real-time recognition on-device.

How to do it: pick a project that hasn't been filled by phone-camera solutions yet. Pool (pocket detection, shot tracking), archery (scoring), disc golf and table tennis serve training are all worth a look (inferred; check the stores first to see which is still empty). Scoring itself is free, unlimited, and requires no sign-up. Charge only for what needs servers, such as online matches, tournaments and cloud data, with a yearly price under €20. Get accuracy solid first, since nearly all one-star reviews are "doesn't recognise it".

How to acquire users: first find local niche YouTubers and Facebook groups, and have a native-language review video out in the launch month. Then find UK or US review channels for that sport and get their titles to hinge on price ("The £2 £500 killer?"). Actively show up on that sport's price comparison sites and in "which app do you use" threads. Use feature keywords in the store title, like "Automatic Pool Scorer".

When to get in: on-device vision scoring is being built one sport at a time. For darts, Dartsmind, DartsOn and the Autodarts Lens phone scoring all launched 2024 to 2026 years ago (inferred: the window is about two years). If you pick a sport, go live within 6 months, before the big brands in that sport launch their own official apps.

Signs you've got it wrong: ① for the sport you picked, a search for feature keywords already returns three or more free, working camera-scoring apps; ② three months after launch, local groups and review videos have brought in fewer than a few thousand installs, meaning the community isn't dense enough or people don't care about scoring; ③ look at Darteer itself: if, after Autodarts lifts its free-game limit, its weekly Google Play growth drops from 2,000+ to a few hundred, price alone can't hold for long, and your project needs something beyond price too.