# [071] AI single-function micro-tools (one verb, one search term: convert to SVG, convert to LaTeX, text-to-speech, PDF generation API): a solo builder collecting cash for 12 months, sold while last month's revenue is still ≥ TTM/12 > Source: https://stringers.io/en/o/071.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 > A clear verb can be built in a week, and one search term gets you SEO traffic. [Home](https://stringers.io/worth/) / [071] # Single-feature AI micro-tools (one verb, one search term: SVG converter, LaTeX converter, text-to-speech, PDF generation API): solo builder collects cash for 12 months, sells while last month's revenue is still ≥ TTM/12 Live Inspirational · the playbook (build it, collect cash, sell before it falls) First spotted 2026-11-02 · Last updated 2026-11-02 Status Live (will fall: consumer-facing text tools were absorbed by LLMs first; developer APIs and hand-made tools last longer) Why now, and how long the window lasts A clear verb can be built in a week, and one search term brings SEO traffic. The window for a single tool is 12–24 months, and it starts to fall once ChatGPT / Gemini / Claude builds that verb into their products. Confidence Medium. 11 listings are all seller-filled; 10 uploaded a P&L. "Consumer text tools fall first" is inference, but the run-rates already show the direction. Would flip if the still-growing SVG / LaTeX listings drop below 1 next month, or if the falling humanizer / prompt tools rebound. ## 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. ### For-sale listings5 evidence items - For sale listing (Acquire, P&L, 11-02 listed, still growing): k2flx91x0u image / text → SVG (for Cricut and laser-engraving users, solo, 12 months, TTM $85,200 / $55,200, last month $12,000, run-rate 1.69, asking $250,000); z75uq7rq5o handwriting / PDF → LaTeX (solo, TTM $59,700, last month $7,000,1.41, asking $190,000); iwu7bmnknk one-click profanity removal from video / audio (solo, TTM $28,600, last month $3,100,1.3, asking $90,000). - For sale listings (Acquire, P&L, developer APIs, which don't fall as fast): f5to5nqgj6 PDF generation + screenshot API (Germany, solo, 50 months, TTM $71,900 / $65,400, last month $6,800,1.13, asking $170,000); 1ivu6r0lh5 Text-to-SQL (solo, 63 months, 238 subscriptions, last month $3,000,0.72, asking $150,000). - For sale listings (Acquire, P&L, consumer text tools, falling): ej18c4vtui prompt rewriter (Chrome + Web + MCP, 50k users, TTM $168,000 / $148,000, last month only $2,500, run-rate 0.18, still asking $350,000, which is 11.7× current annualized revenue); 8kg90xiqku humanizer (solo, 57 months, last month $1,500,0.37, asking $29,500, the seller admits revenue and traffic are falling); ag8qax9ofw one-click "remove AI tone" app (last month $8,500,0.87, asking $299,000). - For sale (Acquire, P&L): s2ov91bhrm iOS text-to-speech (France, solo, TTM $200,000 / $180,000, last month $13,000,0.78, asking $150,000, below current annualized); js81eti4zg video AI subtitles (solo, last month $5,600,0.91, asking $109,000). - For sale (counter-example, Acquire exiqebus7a, no P&L shared): TradingView Pine Script to Chrome extension generator, TTM $450,000 / $330,000, last month $9,600, run-rate 0.26, asking $200,000. Report §4.9: listings like this price off TTM, which means pricing off the rear-view mirror. ### Indie product revenue (TrustMRR)1 evidence · 4 products with curves [Humanizer PRO](https://trustmrr.com/startup/humanizer-pro) texthumanizer.pro TrustMRR · 30-day revenue $888 (+7%) · MRR $834 · 67 subscriptions Monthly revenue (verified by payment platform) 2025-11 → 2026-11 (13 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. [Natural Text AI](https://trustmrr.com/startup/natural-text-ai) naturaltextai.com TrustMRR · 30-day revenue $143 (+14%) · MRR $137 · 13 subscriptions Monthly revenue (verified by payment platform) 2025-11 → 2026-11 (13 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. [SVG Weave](https://trustmrr.com/startup/svg-weave) svgweave.com TrustMRR · 30-day revenue $59 (−47%) Monthly revenue (verified by payment platform) 2026-03 → 2026-11 (9 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. [Anim8](https://trustmrr.com/startup/ternary-studios) tryanim8.com TrustMRR · 30-day revenue $448 (-89%) · MRR $378 · 42 subscriptions Monthly revenue (verified by payment platform) 2025-11 → 2026-11 (10 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. - Indie (30 days, as of 11-01): the similar products with public revenue are all tiny: Humanizer PRO (texthumanizer.pro) $857, +11%; Natural Text AI $137; SVG Weave $80; Anim8 $483 (−90.5%). ## Already doing it Those are the listings above; each verb has a cluster of same-named small sites (inferred). ## The hardest step Judge whether a model's next version will build this verb in, and time the sale right. Sellers commonly ask based on TTM; buyers look at last month. ## Who it's for Solo, subscription or usage-based; prefer developer APIs and manual / maker workflows (Cricut, laser, LaTeX) and avoid verbs like 'polish text'. ## Should every product builder know this? Yes. 'Look at last month before TTM' and 'sell when run-rate ≥ TTM/12' apply to anyone selling a product. ## Change log 2026-11-02 Backfill check: all 11 listings still for sale, none cut in price, run-rate matches the report. The voice-input fz7krp5anw in report §2.6 goes under [073]. 2026-11-02 First record (backfill: from 'For sale (batch 1)' §2.6 and §4.9, data as of 2026-11-02). Original: Scanner opportunity library #071 (updated daily, 06:00); this page was generated on the 2026-11-08 edition.