Prompt Planter

Write, test, and grow your prompts. Track versions of your AI prompts with diff view, version restore, and {{template}} variables.

Prompt Planter is a calm, private home for the AI prompts you actually want to keep.

If you reuse the same prompts across Claude, ChatGPT, Gemini, or Copilot, you know the pain: the good version is buried somewhere in a chat history, and you end up rewriting it from scratch. Prompt Planter lets you save your best prompts, improve them over time, and grab the right one in seconds.

GROW YOUR PROMPTS

• Keep prompts, project instructions, skills, CLAUDE.md files, and system prompts in one library.
• Every prompt has a full version history. Save a new version whenever you tweak it, with a short note on what changed.
• Rate each version and record how it actually performed, so you always know which one works best.

ONE PROMPT, TUNED FOR EVERY AI

• Create variants of the same prompt for different models (for example, "For Claude" and "For ChatGPT").
• Tag prompts by AI and by purpose so you can find exactly what you need.

CAPTURE IDEAS FAST

• Jot a quick draft, then save it to your library as a new prompt, a new version, or a new variant.
• One-tap copy to the clipboard, ready to paste into any chat.

STAY ORGANIZED

• Pin your go-to prompts to the top.
• Mark favorites, filter by kind, AI, or purpose, and search the full text.

YOUR DATA STAYS YOURS

• Everything is stored locally on your device. No account, no sign-in, no ads, no tracking.
• Export and import your whole library as a JSON file for backup or moving between devices.

FULLY BILINGUAL

• Use the app in English or Japanese, switchable anytime.

Prompt Planter is designed to be quiet, fast, and out of your way, so your prompts can grow alongside your work.

(iCloud sync is planned for a future update.)