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Build The Keyword Gems · Apr 4, 2025

💎 3 mini-tool ideas with passive income

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Katt · Build The Keyword Gems

During the Build Challenge I challenged Lee to build something in 1 day.

The criteria:

  • Keyword with minimum of 30,000 monthly search volume (so you can monetize with display ads)

  • Keyword that specifically addresses a problem.

  • And as usual low keyword difficulty

He could build in 1 day a mini-tool around it thanks to:

  • Using ai builder Lovable

  • Focussing on the 1 feature that solves the problem

  • Keeping it simple: no authentication, no payments, no complicated upgrade flows because the goal is to monetize with display ads when traffic kicks in.

It’s the perfect strategy for small bets.

You want to do it too?

Go to Build The Keyword and use smart search with these topics.

Or check out the 3 ideas below.

We added a bunch more in the library for Build The Keyword customers.

PS: We will be hosting a challenge to build a mini-tool like this in 24 hours. Join here for free :). I can’t wait!

  • Monthly search volume: 246,000

  • Keyword difficulty: 🟢3/100

  • Product idea: a calculator that helps you predict if a school will be closed due to snow days

  • Monetization: google ad sense display ads

  • Monthly search volume: 135,000

  • Keyword difficulty: 🟢5/100

  • Product idea: Calculator to helps investors calculate hoe the investment holdings change after a stock split

  • Monetization: Google ad sense display ads

  • Monthly search volume: 74,000

  • Keyword difficulty: 🟢19/100

  • Product idea: A calculator that estimates Uber fares

  • Monetization: Google ad sense display ads

Here is what the participants built around a keyword with high search volume and low competition during the channel.

  1. Mark built a directory website that helps people find in-person or online professional headshot services

  2. Deborah built a directory of abandoned, forgotten, haunted and historical places across the UK.

  3. Samyak built MyAudioJournal, an AI audio journal for personal growth.

  4. Ben built a directory of Model Context Protocol servers (MCPs).

  5. Mike built a Job board for overnight jobs, night shift jobs, and overnight remote jobs.

  6. Marcus built an all-in-one platform for restaurants to manage and cost recipes, while also handling staff scheduling.

  7. Motlalepula built a newsletter name generator

  8. Dorothy built a curated list of entry level ai jobs opportunities and internships for those looking to start a career in AI or make a switch.

  9. Lee built in 1 day a board calculator to caluculate for wood working projects.

  10. Ben built scrambleletters.com a fun website for word tools and games.

  11. I built a local restaurant directory. I almost gave up but live streaming the thing made me finish it :’).

We will organize a mini build challenge (24 hours) in April. Register here if you want to participate for free.

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