I am not 100% certain, but I believe that they have a mobile app, I think the best way to check if they have an app or not is to check it out on play store or itunes store, though you have to confirm from the website also to see if there is any link to download the app because a lot of hackers could be smart enough in building a phishing app of myetherwallet just to scam people off their money, though that is unlikely because every app is being subjected to review.