Yeah, I agree the system is a pain in the ass (well perhaps me also, if that's what you meant). To obtain a 4G connection in Europe is a pain in the ass and for me, I had to get a Magic SIM card device so that I can switch between a France SIM card and a German SIM card when I take the train between Paris and Stuttgart. Much easier in the US where for $30 a month you can get 4G data almost anywhere. I'm really hoping that all the lessons, quizzes, and materials will be offline in the new iOS app that they are working on.
Until then, here are some ideas:
Rosetta Stone has all of their audio material available for download. It is okay if you already bought their program (levels 1-5 cost $180 now with a coupon).
Pimsleur is absolutely wonderful. Pick it up on Audible.com.
Also available on Audible.com is Learn German with Paul Noble. For about $5 you can get a nice program. Get just level 1 and try it. The other levels are review material.
And if you want to just plunge into material, go for Slow German mit Annik Rubens: slowgerman.com
All of her lessons are downloadable as podcasts and you can listen to lots of material that way. She speaks very clearly and all of the materials come with a text transcript.
Sorry! French Forum. Well for French try http://onethinginafrenchday.podbean.com/. Laetitia does a great job with these and for $3 a month I found it very helpful and I still use them for grammar lessons. It is very much like Annik's Slow German podcast.