This isnt a native iOS app. Its just a web-browser shell to LOTs web interface.
And due to this, navigation, design and functionality are very poor.
And without passbook, its just a very poor choice.
To make a simple check-in, you have to wrestle yourself through tiny fonts and counterintuitive tabs, to at the end receive an email with a poorly formatted mobile boarding pass.
Using this app feels like my days of using Palm Treo back in 2005.
A tip for you: the Lufthansa app allows you to check-in to almost all of LOTs flights, and through it you get a nice Lufthansa passbook boarding pass.
Not to mention its interface…
kaarlows about LOT Polish Airlines