Dobrescu George
Reviewer: AudiophileHeaven
also the ifi iDSD bl is a little cheaper here than the mojo.
You can use iDSD BL from almost any smartphone, it has 100% of its sound quality this way. (You might need to buy a 1-5$ USB OTG cable for it to work)
Be sure to read instructions on iDSD BL, it has some pretty interesting that you need to know before starting to use it.
All in all, you should always pick the one that best suits your needs, from most reviews and opinions, I do think that one will be quite happy with either, try to look into all their properties and abilities. I do recommend iDSD BL, it is the device I use daily with both ie800 and other headphones and it serves me really well.