Privacy

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A place to discuss privacy and freedom in the digital world.

Privacy has become a very important issue in modern society, with companies and governments constantly abusing their power, more and more people are waking up to the importance of digital privacy.

In this community everyone is welcome to post links and discuss topics related to privacy.

Some Rules

Posting a link to a website containing tracking isn't great, if contents of the website are behind a paywall maybe copy them into the post
Don't promote proprietary software
Try to keep things on topic
If you have a question, please try searching for previous discussions, maybe it has already been answered
Reposts are fine, but should have at least a couple of weeks in between so that the post can reach a new audience
Be nice :)

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I built the Loyalty Card Emulator 🪄 (apfelkompott.codeberg.page)

submitted 1 year ago by [email protected] to c/[email protected]

16 comments fedilink hide all child comments

Hey /c/privacy,

Similar to the idea that was proposed a month ago by @[email protected], I built a little web app that allows one to "emulate" EAN13-based loyalty cards. I call it the Loyalty Card Emulator. 🪄

The app allows you to either select one of the built-in card numbers that I have found on the internet. (Only for demonstration purposes, of course!) Or you can just enter a code manually and create the loyalty card from it. The link to a card can be shared (e.g. if you and your SO use the same loyalty card).

At the moment, it is very basic and only has one single design that is supposed to visually mimic one of the biggest loyalty card providers that I know.

Architectural-wise, the app is written in TypeScript, powered by React and Vite. The app does not transmit and/or store your codes anywhere but on your device; it's a single-page application that runs entirely in your browser, without any server component.

The source code is publicly available here. The hosting is taken care of by Codeberg Pages - cheers for that!

Adding new card designs and/or preset codes can be achieved quite easily, so feel free to fork and contribute!

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[–] [email protected] 5 points 1 year ago (1 children)

While it's true that the person who 'owns' the number will get points from whatever you buy, this is still very useful in those stores (increasingly many, anecdotally) where the price is a lot lower at checkout when you have a card or associated phone number. 'Discounts', I.e. un-jacked up prices, only available when you sell your data.

[–] [email protected] 3 points 1 year ago

I can confirm that this is the case at "Albert Heijn" in the Netherlands, where you can "save" a bit of money during checkout if you were to present your loyalty card.