> For the complete documentation index, see [llms.txt](https://satuser.gitbook.io/en-the-book-of-satoshi-by-phil-champagne-beta/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://satuser.gitbook.io/en-the-book-of-satoshi-by-phil-champagne-beta/36.-qr-code.md).

# 36. QR Code

### 36 <a href="#part0042.html-calibre_pb_1" id="part0042.html-calibre_pb_1"></a>

### QR Code <a href="#part0042.html-sigil_toc_id_41" id="part0042.html-sigil_toc_id_41"></a>

TWO CONVERSATIONS related to QR code for mobile phones came up. Based on an original suggestion from user *ec* on the forum, Satoshi suggested using QR code for the bitcoin address for payments at point of sale, a common practice today.

#### Re: URI-scheme for bitcoin <a href="#re-uri-scheme-for-bitcoin" id="re-uri-scheme-for-bitcoin"></a>

Satoshi Nakamoto February 24, 2010 05:57:43 AM

That would be nice at point-of-sale. The cash register displays a QR-code encoding a bitcoin address and amount on a screen and you photo it with your mobile.

<https://bitcointalk.org/index.php?topic=177.msg1814#msg1814>

#### Re: Bitcoin mobile <a href="#re-bitcoin-mobile" id="re-bitcoin-mobile"></a>

Satoshi Nakamoto February 24, 2010 05:57:43 AM

Quote from: sirius-m on June 10, 2010, 01:51:16 PM

You can of course use services like vekja.net or mybitcoin.com on a mobile browser, depositing money there to the extentyou trust them.

I think that’s the best option right now. Like cash, you don’t keep your entire net worth in your pocket, just walking around money for incidental expenses.

They could make a smaller version of the site optimized for mobile. If there was an app, it could be a front end to one of those, withthe main feature being QR-code reader, or maybe there’s alreadya universal QR-code reading app that web sites can be designed to accept scans from.

If there was an iPhone app that was just a front end for vekja or mybitcoin, not a big involved P2P, would apple approve it and if not, on what basis? It could always be an Android app instead. An app is not really necessary though, just a mobile sized website.

A web interface to your own Bitcoin server at home wouldn’t be a solution for everyone. Most users don’t have a static IP, and it’s too much trouble to set up port forwarding.