Design mobile apps by chatting with AI
Sleek turns a chat about an app idea into polished mobile app designs in minutes.
Coding · Do this yourself
Run an authorized pentest agent on an old Android phone.
✅ He reports the small model produces a usable command about 50% of the time.
Who it’s for
People who build or maintain software, and non-developers who want a small tool made for them.
Adapt it to your industry
- Shop owner: a small script that exports orders to a spreadsheet every night
- Agency: a reusable starter template for client websites
- Healthcare or legal office: a simple internal form that saves to a shared sheet
Step by step
- Install Cursor (cursor.com) or Claude Code, and open an empty folder for this project.
- Write a one-paragraph description of what you want in a file called README.md: who uses it, what goes in, what comes out.
- Open the AI chat panel and paste the prompt below, then let it propose a plan before it writes any code.
- Ask it to build the smallest working version first and run it. Paste any error message straight back into the chat.
- Test it with one real example from your work and write down what is wrong.
- Ask for one fix at a time. After each working change, save a copy (for example with “git commit”).
- When it works, ask the AI to write short instructions so a teammate can run it.
Ready-to-copy prompt
Start with AI
Opens the AI with this guide and the prompt filled in.
- Cost
- $0–20/month (free tiers or one AI plan)Our estimate
- Time
- 2–6 weeksOur estimate
How to make money from it
Pricing idea: Sell it as a small tool: a one-time setup fee plus a low monthly price for hosting and fixes, or a self-serve plan from about $10–50 a month.
Finding your first 10 customers
- Fix a real problem for 3 people you already know, for free, in exchange for honest feedback.
- Post a short demo video where your audience hangs out (X, LinkedIn, Reddit, a Slack or Discord group).
- Ask each happy user for one introduction to someone with the same problem.
Ideas, not promises. Results vary.
Details: source, numbers and tags
What they did
The phone’s model picks targets and tools; a proxy checks every command against the allowed scope; findings are matched to a local CVE database.
How it went
He reports the small model produces a usable command about 50% of the time.
Worth knowing
Only test systems you own or are authorized to test.
- Difficulty
- AdvancedOur rating
- Time to build
- Not reportedOur estimate
- Monthly cost
- Not reported
- Revenue
- Not reportedWe only show revenue the source states
- Engagement
- 120 HN points35 comments · fetched Oct 15, 2026
Original builder recipe
- Android phone
- Local 1.2B model
- Scope proxy
- Open the repo in your coding agent and describe the goal and constraints.
- Ask for a plan first, then let it implement in small, reviewable steps.
- Run the tests or the app after each step and feed errors back.
- Review the diff before merging.
Tags
Read the original
- Hacker News: news.ycombinator.com/item?id=49154127 ↗ (opens in new tab) Aug 3, 2026 · 120 points, 35 comments (fetched 2026-10-15)
- GitHub: github.com/garagehq/nightcrawler/ ↗ (opens in new tab) Aug 3, 2026
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