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A minimal, calm barcode & QR code scanner for the Mudita Kompakt

calm-qr 최신버젼 다운로드

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# Calm QR

**Calm QR** is a minimal, calm barcode & QR code scanner and storage built for the **Mudita Kompakt**.

The interface and philosophy aspires to follow that of [Mudita Mindful Design](https://mudita.com/community/blog/introducing-mudita-mindful-design/).

---

## Background
I've been living with my **Mudita Kompakt** for a little while now, and one of the pain points I keep encountering is simply needing to have QR codes -- to scan and to keep for tickets, returns, etc.

I found some open source QR scanning apps (it's a fairly rudimentary thing) but they just all felt clunky on the Kompakt. I've scraped this little thing together to hopefully solve that pain point for myself and others as well.

## Screenshots

| Home | Scan Result | Saved Code | Delete Confirm |
|---|---|---|---|
| ![Home](https://raw.githubusercontent.com/jacobrmoss/calm-qr/main/screenshots/calm-qr-homescreen-list.png) | ![Scan Result](https://raw.githubusercontent.com/jacobrmoss/calm-qr/main/screenshots/calm-qr-saving-qr.png) | ![Saved Code](https://raw.githubusercontent.com/jacobrmoss/calm-qr/main/screenshots/calm-qr-simple-qr.png) | ![Delete Confirm](https://raw.githubusercontent.com/jacobrmoss/calm-qr/main/screenshots/calm-qr-delete-confirmation.png) |

| Barcode | Barcode Verify | Browser Link | Home |
|---|---|---|---|
| ![Barcode](https://raw.githubusercontent.com/jacobrmoss/calm-qr/main/screenshots/calm-qr-simple-barcode.png) | ![Barcode Verify](https://raw.githubusercontent.com/jacobrmoss/calm-qr/main/screenshots/calm-qr-barcode-verify.png) | ![Browser Link](https://raw.githubusercontent.com/jacobrmoss/calm-qr/main/screenshots/calm-qr-browser-link.png) | ![Home](https://raw.githubusercontent.com/jacobrmoss/calm-qr/main/screenshots/calm-qr-homescreen-blank.png) |

---

## Features

- **Scan QR codes & barcodes** — powered by CameraX + Rust (rxing)
- **Save & manage scans** — persisted locally with Room
- **Open links directly** — tap to launch URLs in the browser
- **Save Wifi** — save wifi configs from QR codes directly to your device
- **Save to Contacts** — save vCard QR codes to your phone contacts
- **E-ink optimized UI** — built with Mudita Mindful Design (MMD) components
- **Fully offline** — no network permissions, no analytics, no trackers
- **Multi-language support** — 23 languages included

---

## Supported Languages

English, Spanish, French, German, Portuguese, Chinese (Traditional & Simplified), Japanese, Korean, Arabic, Hindi, Italian, Russian, Polish, Dutch, Swedish, Norwegian, Danish, Finnish, Czech, Hungarian, Romanian, Ukrainian, Greek

---

## Supported Formats

QR Code, Aztec, Data Matrix, PDF 417, Code 128, Code 39, Code 93, Codabar, ITF, EAN-13, EAN-8, UPC-A, UPC-E, Telepen

---

## Tech Stack

- **Language:** Kotlin + Rust
- **UI:** Jetpack Compose with Mudita MMD
- **Barcode Engine:** [rxing](https://github.com/rxing-core/rxing) (Rust, via JNI)
- **Camera:** CameraX
- **Database:** Room
- **Min SDK:** 28 · **Target SDK:** 35

---

## Known Issues
It's not perfect, and I've thrown it together quickly. Here are some of the things I'm thinking about it.
### Barcode scanning is not as reliable
I decided to add in barcode scanning to replace that dreaded "I just need to scan the __ sent to your email" which doesn't really work so well when you don't carry around your email. Often those are QR codes, sometimes barcodes. I've found the barcode scanning isn't as reliable, and my attempts to improve it haven't done too much. Be sure when scanning in a barcode that it looks like the barcode you scanned. If it is overly simplified there's a good chance it was done incorrectly. I've added a little helper text for the users to verify manually whether it was done correctly and prompts to re-scan if it wasn't.
### QR code images change
The underlying data has been consistent in my testing, however, the library and methods I've used generate new QR code images most of the time than the exact one that is input. This should be fine since the format allows for this variance, but it's something to keep in mind.
### Under-tested in real life
I've just started using it myself, so I can't say that it works well in all scenarios. Use with care and caution and have back up images just in case.
### Flashing for the codes
I added a full screen flash before displaying the codes -- this is to clean up the ghosting on the e-ink screen as we prepare the codes to be scanned. I quite like the result, however, I do worry for those who might be sensitive to screens flashing (even when that flash is not accompanied by direct light beams). I just want you to be aware if this is you.

---

## License

Licensed under the Apache License, Version 2.0. See [LICENSE](LICENSE) for details.

---

**Built with mindfulness for a calmer digital experience.**

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