Make your AI know you.
Every chat with an AI starts with a stranger. It does not know your job, what you already understand, or that you hate being told "Great question!". Custom instructions fix that for every future chat, and almost nobody sets them up, because a blank box that says "how should I respond?" is hard to answer.
Onboard asks you instead.
WHAT IT DOES
- Interview: name, role, place, what you use AI for, anything it should always know
- Knowledge levels per topic (beginner, comfortable, expert) so explanations land at the right height
- Two tone dials with the exact sentence they produce shown as you drag
- Sixteen house rules with one click each: answer first, no flattery, admit when unsure, push back on me, ask before guessing, no em dashes, no AI vocabulary, numbered how-tos, flag stale info, whole files not snippets, and more
- Conflicting rules switch each other off
- Spelling, units, your own banned words, your own rule
- Output for ChatGPT (two boxes with live 1,500-character meters), Claude, Gemini (one fact per line, copy each) and an any-chat opening message
- Compact wording mode when you are over a limit
- Separate profiles for work, personal, a side business
- Six test prompts with what to look for
- Backup and restore
Who it's for
Anyone who uses an AI most days and keeps re-explaining who they are and how they like answers.
What you get
- Onboard (one .html file, runs in your browser, offline)
- A 2-page quick-start guide
Good to know
- Works with the AI you already use: ChatGPT, Claude, Gemini and the rest. There is no AI inside the app, so no API key, no credits and no monthly fee.
- One file. No install, no account, no subscription, no internet needed after download.
- Your data stays on your computer. Export a backup any time; import it on another machine.
- Built for a computer screen: Windows or Mac, in Chrome, Edge, Safari or Firefox.
- Instant download.
Need a custom app built for your business? I build native iOS apps and web tools from prototype to launch. Services and pricing · LinkedIn
AI tools
Onboard
custom instructions builder for ChatGPT, Claude and Gemini: a 3-minute interview that makes every answer fit you
Most people have never filled in their AI's custom instructions, so every chat starts from zero. Onboard interviews you (who you are, what you know, how you want answers) and writes the text for ChatGPT's two boxes with live 1,500-character counters, Claude's preferences, Gemini's saved info, and a paste-anywhere opener. Then six test prompts prove it stuck.
One-time price in US dollars, checkout by Stripe. After paying you land on a page with your download link. Each link works for 15 minutes, and reopening that page makes fresh ones.
- Onboard-Custom-Instructions.zip