[nash]

So.. I just added my card to Stocard and used it a King County. Took 2 minutes, on my phone, synced across devices.

Or yeah, you could do it that way I guess.

[gumby]

This eliminates the need for multiple wallets. Plus it's a fun hack.

Stocard addresses a different point in the design space.

[yftsui]

If you are using an app for it, King County Library app already has the barcode anyway…