Yes, I remember when I launched my wallet on Mac (I installed it a while ago to test and understood that mining on the laptop where you work is a bad idea) - and it took several hours or more to synchronize with the chain.
So mobile wallet is a great idea, and I think the reason why Karbowanec grows might be also because of inclusion this into roadmap.

Also it's possible to keep Karbowanec in Cryptopia and send/receive coins there. I saw many people use Cryptopia and other exchangers for this, it's especially helpful if you don't use particular currency often (so no need to download new application)