Smartphones are becoming more essential for everyday living, as users depend on their devices to stay in touch with friends and family, track their finances and hold much of their personal information.

New apps and mobile accessories are making them more useful than ever, and in some ways, perhaps too intrusive. The federal government recently began regulating mobile software and attachments that are designated healthcare tools, including an app that claimed to treat skin problems with light emissions.

One new health-based product that may not end up being government regulated is coming out of Japan, and could help users make dietary decisions. The attachment is a breathalizer-style device that, when breathed into, allegedly measures the user's body fat level.

The accessory, and several other innovations, were recently presented by Japanese mobile company NTT DoCoMo. Another of the company's newest features is a device that measures alcohol on the breath – or halitosis, depending on the setting. The breath measuring devices are part of hard phone cases, so can be easily transported.

Whether or not these new accessories are released in U.S. Markets, it appears smartphones will soon be guiding users on major life decisions, such as what to eat and when to use a breath mint.