Absolutely. Mobile poker is one of the fastest growing segments of the industry and there are many sites that offer apps for both Apple iOS (iPhone, iPad) and Android.
Online poker is a great way to kill time on long commutes or in waiting rooms. You’ll generally only be able to play one table at a time but it’s still very fun.
Mobile poker does depend on the country where you reside because every app on iTunes or Google Play has to go through a certification process. That’s why you won’t see any official apps for unregulated online poker sites.
That doesn’t players who play on unregulated sites are out of luck, however. Most unregulated sites offer mobile through in-browser play, which generally isn’t as good as a standalone app but is available for every type of device that can run a browser.