This app was mentioned in 6 comments, with an average of 1.67 upvotes
Any Bitcoin wallet on a phone can be used as a PoS device. In particular, blockchain merchant was created for this. Is what you're looking for integration with the rest of the PoS system for till reconcilation? Maybe Swish does that, but I'm not sure.
Try Blockchain Merchant: https://play.google.com/store/apps/details?id=info.blockchain.merchant
The app Blockchain Merchant will be useful:
https://play.google.com/store/apps/details?id=info.blockchain.merchant
https://itunes.apple.com/app/blockchain-merchant/id947009571?mt=8
There were at least two in Oz a few years back. dcpos and bitpos both seem to have shuttered their operations. The advent of lightning network left quite a few services needing major upgrades. For a coffee shop I'd be looking for off chain channels like that of which Lightning Networks enables.
However as chunzi has mentioned, Blockchain.info have a merchant service in the play store and iTunes.
Hope this helps.
Here is the post for archival purposes:
Author: besnadlesen
Content:
>Looking for a developer capable of forking this open source Android POS terminal https://github.com/blockchain/Android-Merchant-App and adding a few features.
>This is what it looks like https://play.google.com/store/apps/details?id=info.blockchain.merchant
>Basically I would need to add optional bitstamp API support, making all the text translatable in to other languages and adding support for a thermal printer to print out receipts