Create your own flash cards, or pick from a crowd-sourced pool.
The phrase-based approach is meant for people who are immersed enough in the new language that you have friends, colleagues, and family who can help you learn new words and phrases that are useful from day one.
(This is not a company, just an app. It's open source and free to use. If you like Django and want to help with the app, come have a look.)