# [030] Niche sports × AI: AI boxing coaches, rugby / fight manager sims, camera-scored auto-scoring darts, subscription-based; single products reach $1–50k a month, but they depend on paid acquisition and margins are thin

> Source: https://stringers.io/en/o/030.html (Stringers / 什么值得做, generated 2026-11-08)
> Stringers answers one question every day: what small product can one or two people build in a few months and actually make money from. Numbers come from 15 databases we collect daily, each with source and date.
> For agents: these verdicts and the underlying databases (verified revenue, App Store / Google Play charts, ad libraries, GitHub, Product Hunt…) are queryable live over MCP — tools today / hot / products / directions / direction / data. Setup: https://github.com/komako-workshop/stringers (the user logs in at stringers.io → "配置 agent" to get a personal URL). Site index: https://stringers.io/llms.txt

> Phone-based pose detection and vision models are now accurate enough, so "AI coach" and "camera scoring" are possible for the first time.

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# Niche sports × AI: boxing AI coach, rugby / fight-manager sims, camera auto-scoring darts, subscription. Single products reach $1–50k a month, but rely on paid acquisition and thin margins

Watching Inspiration · niche audience + new capability First spotted 2026-11-01 · last updated 2026-11-02

Status

Watching (one sample per sub-direction; need to see whether Brawler's November revenue and Autodarts' ranking hold up)

Why now, and how long the window lasts

Phone-based pose detection and vision models are now accurate enough, so "AI coach" and "camera scoring" are possible for the first time; the big players aren't making niche sports like boxing, darts, combat sports, or high school football, and enthusiasts are willing to subscribe. Brawler went from $4k in 5–September to $49k, showing that paid acquisition can scale it. The window length is unclear (single sample).

Confidence

Low. One sample per sub-direction. Disproving conditions: Brawler's November revenue falls below $35,000, or listing sale prices land well under $200k. Upgrade conditions: a second "AI coach" product passes $10,000 in revenue within 30 days, or Autodarts holds a top-20 spot in de Sports Top Grossing for two weeks.

## Evidence

Grouped by store. Each group starts with the charts that can be graphed (real curves, data dates below the chart), then the scanner's original notes and source links.

### Indie product revenue (TrustMRR)2 evidence · 3 products with curves

[Football Coach](https://trustmrr.com/startup/football-coach)

TrustMRR · 30-day revenue $13,653 (+47%) · MRR $2,257 · 407 subscriptions

Monthly revenue (verified by payment platform)

2026-07 → 2026-11 (5 pts). Light bars = current month, not yet complete

Daily revenue (UTC day)

Data 2026-09-29 → 2026-11-06 (39 days, 39 observations). Single-day swings are big, so look at the trend in the monthly breakdown above.

[MMA](https://trustmrr.com/startup/mma)

TrustMRR · 30-day revenue $1,798 (+13%) · MRR $633 · 80 subscriptions

Monthly revenue (verified by payment platform)

2026-06 → 2026-11 (6 pts). Light bars = current month, not yet complete

Daily revenue (UTC day)

Data 2026-09-29 → 2026-11-06 (39 days, 39 observations). Single-day swings are big, so look at the trend in the monthly breakdown above.

[High School Football Coach](https://apps.apple.com/us/app/high-school-football-coach/id6762107690) Richard DeBanks

App Store · launched 2026-06-15 · US store rating 543 · charted in 11-08 of 1 stores

Best category chart rank · by store

Data 2026-10-29 → 2026-11-07 (10 days, 7 observations). Lower rank is higher; gaps mean it wasn't charted that day

Ratings count · US store

Data 2026-10-29 → 2026-11-07 (10 days, 7 observations). Apple doesn't publish download counts; rating growth is a proxy for downloads.

- Indie (11-02): Brawler (AI boxing coach, US) took in $45,576 in 30 days (−11.7%), MRR $23,585,4,540 from subscriptions; $9.99/month, $59.99/year; the channel is Meta ads plus influencers; listing asking price $200,000, about 0.4× annualized revenue. Monthly revenue May $4,152 → September $48,751 → October $47,844 (reported figures).

- Indie (11-02): the same line also includes Football Coach (high school football manager sim) at $12,275 (+33.4%), listed at $190,000; MMA (fight manager) at $2,124 (+81.4%). On the App Store, High School Football Coach (6762107690, Richard DeBanks) is us Sports Top Grossing #185 with 510 ratings; inferred to be the indie Football Coach.

### App Store2 evidence items · 2 products with curves

[BRAWLER- Future of Boxing](https://apps.apple.com/us/app/brawler-future-of-boxing/id6760366949) Brawler LLC

App Store · launched 2026-05-01 · US store rating 2,408 · charted in 11-08 of 11 stores

Best category chart rank · by store

US store Australia UK

Data 2026-10-28 → 2026-11-08 (12 days, 12 observations). Lower rank is higher; gaps mean it wasn't charted that day

Ratings count · US store

Data 2026-10-28 → 2026-11-08 (12 days, 12 observations). Apple doesn't publish download counts; rating growth is a proxy for downloads.

[Autodarts: Darts Scorer](https://apps.apple.com/bg/app/autodarts-darts-scorer/id6759263107) Autodarts GmbH

App Store · first launched 2026-09-02 · UK ratings 341 · charted in 34 stores (11-08)

Best category chart rank · by store

Germany UK Australia

Data 2026-10-28 → 2026-11-08 (12 days, 12 observations). Lower rank is higher; gaps mean it wasn't charted that day

Rating count · UK

Data 2026-10-28 → 2026-11-08 (12 days, 12 observations). Apple doesn't publish download counts; rating growth is a proxy for downloads.

- App Store (au/ca/us, 11-02): BRAWLER (6760366949) Sports Top Grossing au #46, ca #63, us #115 (report: au #41, ca #52); us has 2,299 ratings, and today 7 stores are charting (report: 10 stores). The report uses "$45k / 30 days ≈ au Sports Top Grossing #41" as its only revenue and ranking anchor.

- App Store (all storefronts, 11-02): Autodarts: Darts Scorer (6759263107, Autodarts GmbH, 09-02) charted in 24 stores with about 735 ratings combined; Sports Top Grossing at #19 (at), #24 (de), #54 (nl), #60 (gb), #94 (se) (report: de #25, se #35, nl #43).

### Google Play1 evidence items · 3 products with curves

[Autodarts: Darts Scorer](https://play.google.com/store/apps/details?id=com.autodarts.play) Autodarts GmbH

Google Play · Launched 2026-08-24 · 11-07 installs 59,440

Global cumulative installs

Data 2026-10-29 → 2026-11-07 (10 days, 10 observations). Google's detail page only refreshes install counts every other day, so a flat day doesn't mean nobody installed.

Ratings (total)

Data 2026-10-29 → 2026-11-07 (10 days, 10 observations)

[DartsOn: Darts Scoreboard](https://play.google.com/store/apps/details?id=eu.rsapps.darts) RSApps Nordics

Google Play · Launched 2026-08-18 · 11-07 installs 19,965

Global cumulative installs

Data 2026-10-29 → 2026-11-07 (10 days, 10 observations). Google's detail page only refreshes install counts every other day, so a flat day doesn't mean nobody installed.

Ratings (total)

Data 2026-11-01 → 2026-11-07 (7 days, 7 observations)

[Darteer: Automatic Dart Scorer](https://play.google.com/store/apps/details?id=ai.darteer.darteer) Darteer.ai

Google Play · Launched 2026-07-05 · 11-07 installs 19,126

Global cumulative installs

Data 2026-10-29 → 2026-11-07 (10 days, 10 observations). Google's detail page only refreshes install counts every other day, so a flat day doesn't mean nobody installed.

- Google Play (de/gb, 11-02): Autodarts (com.autodarts.play, 08-24) has 56,503 installs and 802 ratings, Sports Top Grossing de #15, gb #20 (report #18, #24). Similar apps DartsOn (eu.rsapps.darts) with 17,890 installs and Darteer (ai.darteer.darteer, camera-based auto-scoring) with 17,429 installs have not entered the local Top Grossing charts.

### Qualifying list 1 pieces of evidence

- Pass-line list (11-02): the Autodarts Play version "first entered de SPORTS Top Grossing" passed the line; "flat" on 11-02 (10-31).

### Meta Ad Library1 evidence items

- Meta ad library (11-02): searching brawler and autodarts returned no hits; the term list doesn't cover it.

## Already doing it

Brawler, Football Coach, MMA (indie); Autodarts, DartsOn, Darteer (darts scoring).

## The hardest step

Paid acquisition and margins. Brawler's founder himself only lists 0.4× multiples, which suggests very thin margins; October revenue has already started to decline. Camera scoring requires accuracy, and Autodarts is backed by a company (whether it pairs with its own hardware was not verified today).

## Who it's for

Someone who practices a niche sport and is willing to run Meta ads, roughly 1–2 people; a subscription at the $10/month tier.

## Should every product builder know this?

No.

## Change log

2026-11-02

Backfill check: Brawler $45,587 → $45,576, MRR $23,194 → $23,585; au Sports Top Grossing #41 → #46, ca #52 → #63; Football Coach growth +43% → +33.4%; Autodarts Play de #18 → #15, gb #24 → #20, iOS se #35 → #94.

2026-11-01

First recorded (backfill: from §1.8 of "Products in the revenue library that recently started earning," §1.7 of "App Store New Opportunities," and §1.10 of "Google Play New Opportunities"; data as of 11-01).

Original: Scanner opportunity library #030 (updated daily, 06:00); this page was generated on the 2026-11-08 edition.