I do not know any cheap / free way to do that though.
Some time ago we developed an app where we needed a function to take a photo of a receipt and extract the data like total price, product items, shop name, address, etc. Back then we started, like you, to search for some products on the market to fulfill this task. Unfortunately all the solutions we found were quite expensive or not working as we expected.
We then decided to develop it on our own. Recently we have added the possibility to process invoices too. You can find the new endpoint of our REST API in the documentation: https://www.eagle-doc.com/documentation.php
If you stay below 100 receipt or invoice pages per month, the service is free. After that you only pay 0.03 € per page with a pay as you go pricing model.
Some time ago we developed an app where we needed a function to take a photo of a receipt and extract the data like total price, product items, shop name, address, etc. Back then we started, like you, to search for some products on the market to fulfill this task. Unfortunately all the solutions we found were quite expensive or not working as we expected.
We then decided to develop it on our own. Recently we have added the possibility to process invoices too. You can find the new endpoint of our REST API in the documentation: https://www.eagle-doc.com/documentation.php
If you stay below 100 receipt or invoice pages per month, the service is free. After that you only pay 0.03 € per page with a pay as you go pricing model.