# Get a private little app for the task you repeat every week

> Your client numbers stay on your own computer, because the finished tool runs with no AI at all.

Describe a chore you do by hand every week, and Claude builds a one-file web page that does it for you. You save it and run it in your browser, so your data never goes back to the AI.

- Page: https://thesolocreators.com/prompts/private-mini-app-for-a-repeat-task/
- Category: Put your business on autopilot
- Made for: Small business owners, Coaches, Everyone
- Works in: Claude, ChatGPT, Gemini
- Time: About 15 minutes to build, then reuse it any time
- Effort: A few steps
- Note: Works on free plans. Claude's preview lets you test the tool before you download it.
- Published: 2026-10-20

## Can AI build me a simple tool that keeps my data private?

Yes. Ask the AI to build a small tool as one HTML file instead of doing the task for you each time, then run that file in your browser. Claude fits best when you want to test the tool on screen before you save it. ChatGPT and Gemini also write the same kind of file. Pick this route when the data is private, like client fees, or when you repeat the job every week and want it to run with no AI and no usage limits.

## The prompt

Fill in the parts in [square brackets], or leave them and the AI will ask you for them.

```text
I do this task by hand over and over: [THE REPEAT TASK, e.g. working out package prices for clients]. Here's what I type in each time: [WHAT GOES IN, e.g. client name, hours, hourly rate]. Here's what I want out: [WHAT COMES OUT, e.g. a total and a printable summary]. Build me a small tool as one single HTML file that does this job in my web browser. Rules: it must work offline with no AI, no logins and no outside services, so my data stays on my computer. Use big, clear labels a non-technical person understands, catch obvious typing mistakes, and add a Copy and a Print button for the result. Fill it with fake sample data so I can test it right away. Then tell me in two plain sentences how to save it and open it again next time. If anything about the task is unclear, ask me up to three questions before you build.
```

## Step by step

1. Fill in the prompt below with the task you repeat and paste it into Claude
2. Test the tool Claude shows you with its fake sample data
3. Ask for changes in plain words, like a bigger button or one more column
4. Download the HTML file and save it somewhere easy to find
5. Double-click the file whenever you need it, even offline

## What you'll get

A single HTML file that does your repeat task in your browser, offline, with copy and print buttons and no data sent anywhere.

## Good to know

**Can AI build me a simple tool that keeps my data private?** Yes. Ask the AI to build a small tool as one HTML file instead of doing the task for you each time, then run that file in your browser. Claude fits best when you want to test the tool on screen before you save it. ChatGPT and Gemini also write the same kind of file. Pick this route when the data is private, like client fees, or when you repeat the job every week and want it to run with no AI and no usage limits.

**Which AI tools does this work in?** It works in Claude, ChatGPT and Gemini. On this page, Claude and ChatGPT open with your prompt already typed in. Works on free plans. Claude's preview lets you test the tool before you download it.

**How long does it take?** About 15 minutes to build, then reuse it any time. It's rated "A few steps". There are 5 steps, listed above.

**What do I need before I start?** Just your details for 3 blanks: the repeat task, what goes in and what comes out. You can skip any, and your AI will ask for them.

**What will I get back?** A single HTML file that does your repeat task in your browser, offline, with copy and print buttons and no data sent anywhere.

Idea spotted on Reddit, shared by r/ClaudeAI thread by u/Realestmember: https://www.reddit.com/r/ClaudeAI/comments/1x5or3q/what_is_an_ai_lifehack_that_people_dont_seem_to/. The prompt is The Solo Creators' own version.

## Go further

Ready-made skills in the Solo Creators AI Studio (https://thesolocreators.com/studio/) that fit this: Second Brain (Give your AI a memory it reads across every project, so it finally knows your business); Watch It For Me (Drop any video link and get the step-by-step playbook, the full timestamped transcript, and the best quotes. Without watching it).

From AI Use Cases and Prompts by The Solo Creators: https://thesolocreators.com/prompts/. Free to use; please link back to the page when you share it.