Scanning 18 subreddits + Hacker News

What people are asking to be built

Sonar is a demand signal scanner that monitors 18 subreddits and Hacker News for posts where people describe tools, apps, and services they wish existed. Each signal is scored 0–100 by real demand — upvotes, comments, and willingness-to-pay phrases.

Top signals right now

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100

a guy i talked to makes $14K/month from an app that sends invoice reminders to plumbers. he found the idea in a reddit comment section. here's the actual playbook

r/passive_income·2mo·3603 pts·324 cmt·Money·Small Biz
100

For anyone who's looking for an Alternative to Myrient, there's a good one

r/Roms·1mo·2124 pts·307 cmt·Request
100

Announcement: Temporary LLM Content Ban

r/programming·1mo·2045 pts·242 cmt·Dev Tools
98

Fake It Until You Break It: The End Of Non-Technical Managers In Software Engineering Dawns

r/programming·1mo·966 pts·188 cmt
97

Sell me your Saas in one sentence!

r/SaaS·1mo·142 pts·432 cmt·SaaS
96

Google Is Closing Android. 37 Orgs Are Fighting Back | Techlore

r/programming·1mo·732 pts·188 cmt
95

Started a weird side hustle… accidentally made it work

r/sidehustle·1mo·770 pts·152 cmt·Money·Dev Tools
93

I make $500/month selling PDFs on Etsy and each product takes me maybe 4 hours

r/sidehustle·1mo·724 pts·101 cmt·Money·Freelance

Sources

Sonar monitors 18 curated subreddits including r/startups, r/SaaS, r/selfhosted, and r/programming. Plus Reddit global search and Hacker News via the Algolia API. New signals every 4 hours.

Scoring

Each signal gets a 0–100 demand score combining upvotes, comment count, recency, and willingness-to-pay indicators like “I'd pay for this” or “take my money.”

Classification

Every signal is classified into 3 types: Solution Request (someone looking for a tool), Pain Point (frustration with the status quo), or Money Talk (discussing willingness to pay).