Statistically speaking most people in business have an iPhone, however if you are in business you will find that the apps you need most are from Google. Here is a must have list for any person who is serious about their online (and offline) business. But before I give you the list, think very carefully about your next iPhone purchase as business wise you are limiting yourself. Consider a Google Phone next time around and everything you need for your business will be within a swipe all synced nicely to your Google Account. My choice? Google LG Nexus 4 Phone ($299 Outright) but the Samsung Galaxy S4 ($699 Outright) is the power users choice and arguably eclipses the iPhone in features and technology!
Google Search: https://itunes.apple.com/us/app/google-search/id284815942
Google Maps: https://itunes.apple.com/us/app/id585027354
Google Drive: https://itunes.apple.com/us/app/google-drive/id507874739?mt=8
Google+ Local: https://itunes.apple.com/us/app/google-places/id406513617
Google Voice: https://itunes.apple.com/us/app/google-voice/id318698524 (USA Only)
Google Translate: https://itunes.apple.com/us/app/google-translate/id414706506