I must say that the librexcoin wallet synced fastest of all altcoinwallets that I installed last months.
Thanks for mentioning that point.
I tested the Librexcoin wallet against the competitor wallet on my Samsung Galaxy S3.
I found that the Librex mobile wallet synced in about 15 minutes at a battery drain of 5%. Loads fast, no issues.
The competitor app took nearly 6 hrs to sync (on fast wifi) and battery drained from 87% down to 20%.
Opened competitor wallet app today and after 2 hrs it never would sync so I just closed it down. Not sure what is keeping it from syncing. haven't made any changes since it synced 2 days ago.