Despite the fact that telehealth comes in many forms, there are four main categories of telehealth in the medical field today. Depending on what is needed to get a full scope of the patient's health, each category can benefit the practitioner and patient in different ways. A live, two-way video-conferencing conversation between a patient and their healthcare provider is the most well-known type of telehealth. The use of telehealth is widespread, ranging from providers who own their own private practices to physicians in local hospitals. Patients and providers can benefit from live video-conferencing by reducing commute time and stress, while also bringing healthcare to areas, usually rural, where there are fewer healthcare options than in urban areas. Using asynchronous video, a healthcare provider can electronically deliver a patient's documented health history outside of real-time. Frequently used in rural areas to consult with a specialist in another location, this type of telehealth is also useful in bringing healthcare to areas with a shortage of specialists. Patients' health data is collected remotely from a patient or resident in one location during remote patient monitoring, then sent electronically to a healthcare professional (provider, nurse, etc.) for monitoring and review. Keeping an eye on residents' vitals is especially important in senior living areas to prevent falls. Health apps developed for smart devices (smartphones, tablets, etc.) that support continued healthcare are called mobile health apps. There are now many health-based apps available that can monitor everything from blood sugar levels in diabetics to the amount of water one drinks each day. As well as encouraging healthier lifestyle habits, these apps can also integrate with a patient's personal health records if they are designed to do so.