Micro-SaaS & AI ProductsSource date: July 26, 2026Last reviewed October 20, 2026

A former product designer and his girlfriend built a cat-themed focus timer with AI that he says made over $18K in 30 days

Ryan left a $200K design job; Cat on Chair took off when Instagram influencers featured it in app roundups.

Subject: Cat on Chair (Ryan)Freemium mobile app with annual, lifetime and family plans

Read original source1 source linked below
A laptop showing revenue charts on a desk beside an open notebook and coffee

Case Overview & Background

Ryan was a product designer who quit a job he says paid $200K to build his own apps. With his girlfriend and the help of AI, they built Cat on Chair, a Pomodoro timer where a cat jumps on a chair while you focus and leaves a gift when you finish. He says it has passed 127,000 downloads. It is free, with a $19.99 annual plan and a $29.99 lifetime plan.

How AI Is Used

AI helped build the app. The interview says the app was built 100 percent with AI, and he credits the help of AI and his girlfriend for building it.

Step-by-Step Process

Step 01Make a boring category fun

They added a playful cat to a standard productivity timer.

Step 02Build with AI

A designer without a developer background built it with AI help.

Step 03Let others share it

App roundup posts by Instagram influencers and later Threads posts made it go viral.

Customer Acquisition & Distribution

Organic virality: small moments on RedNote, then Instagram influencers' app collection posts, one of which passed 2 million views, then reshares on Threads in Taiwan.

Limitations, Risks & Failure Modes

What may not apply to you, and what could go wrong:

  • The figures are self-reported and were not independently checked
  • Viral growth can fade without a repeatable channel

Key Takeaways

  • Personality can make a simple utility app stand out
  • Designers can now ship their own apps with AI

Sources

Interview SiteJuly 26, 2026

Starter Story: $18K/Month From This Ridiculously Simple App Idea

Note: Video interview with transcript. States the 18K a month figure, total sales, downloads, pricing and the AI build.

Open Source
Advertising slot availableAdvertise on AI Side Hustles

Category page banner: Reach readers researching one specific AI business model.

One clearly labelled banner on a category page such as Micro-SaaS or AI Agencies, shown next to the documented cases your product is relevant to.

Sponsored placements are always labelled and never change how cases are researched, labelled, or ranked.

Commercial disclosure: We currently have no affiliate or sponsorship relationship with any tool or person on this page. If that changes, affiliate links and sponsored content will be clearly labelled, and evidence labels will never be changed for commercial reasons.

Case ID: cs-cat-on-chair-pomodoro-app-built-with-ai-
Compare

Related Case Studies

DimeADozen.ai social preview: "Validate a business idea before you build it."
Image: DimeADozen.ai
October 16, 2023
1 source

A $185 AI report tool that made $66,000 and sold for $150,000

DimeADozen (Sal Aiello and Monica Powers)

Sal Aiello and Monica Powers built DimeADozen, a site that turns a business idea into an AI-generated validation report. They built it in four days, charged $39 per report, made more than $66,000 in about seven months, and then sold the business for $150,000.

Reported figure
$66,000+ in about 7 months(revenue)
Evidence levelIndependently Documented
Tools:
Inspect Case
Cal AI social preview showing the app scanning a plate of pancakes and listing calories and macros.
Image: Cal AI
September 6, 2025
1 source

Cal AI: a teen-founded photo calorie tracker with about $1.4 million monthly gross profit

Cal AI (Zach Yadegari and Henry Langmack)

Cal AI lets users photograph a meal and get an AI estimate of its calories. Launched in May 2024, it is priced at $2.49 a month or $29.99 a year. CNBC reported about $1.4 million a month in gross profit and about $274,000 a month in net operating income, with a team of 30.

Reported figure
About $1.4M/mo gross profit
Evidence levelIndependently Documented
Tools:none named in the source
Inspect Case
The AI Side Hustles Briefing

Get the free Verified AI Hustles PDF.

Subscribe to get new sourced cases by email and download our PDF of every independently documented case on this site, each with its source link.

By subscribing, you agree to receive the AI Side Hustles briefing. We never sell your data. See our privacy policy.