Shopify app is quite slow! We have been working with you since 2 years and the app (from the release) hadnt changed that much. If I check the orders page sometimes we have orders missing. It freeze all the time I have to use it. I wish you could also add a few more pages in the app like the reports one which is very useful. And also its better to do an ipad version.
Oorroree about Shopify - Your Ecommerce Store, v4.3.3