Buying a medical alert device is not always affordable for seniors, especially those on a fixed income. Personal Medical alarm Fortunately, there are some systems that do not require a monthly fee and still offer some of the most basic safety features.Fall detection devices without monthly feeThese are devices that do not have a central monitoring center and use cellular technology to send signals to the device’s base unit. These do not have the standard safety features, such as 24-hour monitoring, but they do offer a more affordable option for seniors who are on a tight budget.Best for Fall DetectionThe most accurate fall detection device we tested is Lifeline’s HomeSafe with AutoAlert, which uses a combination of three technologies to accurately identify regular movement from a fall. This helps reduce false alarms.Lifeline’s AutoAlert also uses a barometer to sense any differences in air pressure at various distances from the floor, which is particularly helpful for elderly people with impaired vision or hearing.Longest Battery LifeA long battery life is an important feature for fall detection devices, because it means they don’t have to be charged often. Bay Alarm Medical is one of the longest-lasting fall detection devices we’ve reviewed, with a two-year battery in its at-home system.Besides a surprisingly low price, this medical alert system is easy to install and is compatible with a variety of landlines and cellular carriers. It also offers up to three pre-programmed phone numbers and has a two-directional voice feature that allows users to dial in from a home phone or mobile device.