It’s open source and licensed under the AGPL 3.0 too!
You can now add your obl.ong membership as a digital pass to Apple Wallet and Google Wallet.
Note: Google Wallets won’t be available without pre-authorization until Google approves my application. Either use a .pkpass with a supporting android client (see the website for alternative clients) or email me at david (at) obl [dot] ong to get an invite to it.