# Prompt 21

> Prompt 21 (iPhone/iPad app by Cheuk Hin Wong.)

- Source: https://appshunter.io/ios/app/prompt-21/id6752573818 (this page in markdown: same URL + `.md`)
- Developer: [Cheuk Hin Wong](https://appshunter.io/developer/1833016596)
- Category: Productivity, Photo & Video
- Price: Free
- Age rating: 17+
- Requires: iOS 15.1 · 39 MB
- Languages: American English
- Released: 2026-07-09
- Data updated: 2026-09-25
- User reviews in markdown: https://appshunter.io/ios/app/prompt-21/id6752573818/reviews.md

## What is Prompt 21?

Prompt Lab helps you find the right AI prompt fast—and reuse it without digging through Notes, screenshots, or old chats.

Save prompts, templates, blocks, workflows, images, and videos in one local library. Tag everything, search instantly, and copy to your AI tool in one tap. No account required. No cloud sync of your library. No AI APIs—just a fast personal prompt workspace.

FIND PROMPTS FAST

• Search across titles, tags, prompts, and notes on Prompts and Projects
• Tags on every card — organize by style, subject, client, or campaign
• Collections — group related cards for quick access
• Continue, Recently Opened & Most Used — jump back to what you use often
• Explore — browse recommended prompts and save them locally
• Filter by type — prompts, templates, blocks, workflows, images, and videos

SAVE ONCE, REUSE FOREVER

• Prompts — copy-as-is text for any AI tool
• Templates — {{variables}} you fill in each time
• Blocks — mix style + subject + quality in Prompt Builder
• Workflows — multi-step sequences with prompts, templates, media, and links
• Images & Videos — outputs and references with thumbnails

BUILT FOR SPEED

• One-tap copy to clipboard
• Import from clipboard — save AI replies as cards instantly
• Visual card grid — scan prompts and media at a glance
• Version history — fork without losing the original
• Share via link — send prompt details or import from a shared link
• Backup, export & import — move your library between devices

PRIVACY BY DESIGN

Your library stays on your iPhone. No cloud sync, no tracking, no AI generation. Clipboard access only when you import. Optional anonymous sign-in is used only to browse public prompts in Explore.

For AI creators, designers, and prompt engineers who want their best prompts findable in seconds—not buried in folders.

Prompt Lab does not generate AI content. Use it with your favorite AI tools.


## Version history (last 2 releases)

### 1.1 — 2026-07-14

Sharing Prompt Feature
You can share your prompt to any social media or get from there

### 1.0 — 2026-07-09

No release notes.

## Apps similar to Prompt 21

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Clarity Vault](https://appshunter.io/ios/app/clarity-vault/id6770633416) | 5.0 (1) | Free | Productivity |
| [Onemni: Dream Journal](https://appshunter.io/ios/app/onemni-dream-journal/id6812061986) | — | $19.99 | Productivity |
| [HabitMkr: Habit Tracker](https://appshunter.io/ios/app/habitmkr-habit-tracker/id6789409693) | — | $7.99 | Productivity |
| [InfusionLog](https://appshunter.io/ios/app/infusionlog/id6770405328) | — | Free | Productivity |
| [Subnet CIDR Pro](https://appshunter.io/ios/app/subnet-cidr-pro/id6816397989) | 5.0 (1) | Free | Productivity |
| [REDREC - Offline Transcription](https://appshunter.io/ios/app/redrec-offline-transcription/id6792952443) | — | $1.99 | Productivity |

## More apps by Cheuk Hin Wong

- [XOXO Game](https://appshunter.io/ios/app/xoxo-game/id6749962749)

All apps by Cheuk Hin Wong: https://appshunter.io/developer/1833016596

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-25.*