We all know smartwatches are handy to for sending us notifications and tracking our fitness stats, but the latest wearables can do much more than that. As tech companies pack more health and safety features into our smartwatches, they can be real lifesavers. And while that may sound like an exaggeration, the Apple Watch's recently released heart rhythm tracker is already credited with saving lives, even though it's been available for less than a month. So if you're looking for a smart wearable that can help keep you safe, take a look at these. The popular Apple Watch can now track heart rhythm in addition to heart rate, which means it can warn you of potentially dangerous heart problems, like arterial fibrillation. And while all Apple Watches can monitor heart rhythm, the Apple Watch Series 4 can also take an electrocardiogram - just like you would get at the hospital - to provide your doctor with detailed heart health information.

These features has already sent some Apple Watch users to their doctors, where they were diagnosed with serious health problems. But you don't need a heart problem in order for the Apple Watch to be a life-saving wearable. The Apple Watch Series 4 uses its accelerometer and Glyco Carenatural glucose support gyroscope to tell if you've fallen. If the watch detects a fall, It asks if you're okay - and if you don't respond, it calls emergency services and sends text messages to your emergency contacts. The fact that the watch's fall detection features work without any effort from you (beyond setting up your emergency contacts). While the Apple Watch Series 4 can take an ECG, earlier Apple Watch users are left out - which is where KardiaBand comes in. This seemingly ordinary watch band is solid black, resembling Apple's sport bands, but has a silver square located under the watch face. This simple square isn't decorative: it's a sensor, and pressing your thumb to it for 30 seconds will take medical-grade EKG.

Paired with the KardiaMobile app, it will alert you if your heart rate doesn't appear consistent with your activity level and suggest you take an EKG. By capturing this health data early, KardiaBand can help pinpoint health problems before they become life-threatening. Like the Apple Watch and KardiaBand, the Move ECG tracks your heart rhythm to look for signs of arterial fibrillation. Unlike the Apple Watch ($399 and up) and KardiaBand ($99, but requires an Apple Watch), the Move ECG is pretty budget-friendly at $130. However, the watch has an analog face which limits its smart features - you won't find apps and on-screen notifications here. But skipping the smart features means better battery life. The Move ECG will get up to 12 months of use from its replaceable battery compared to the Apple Watch which needs to be charged every day. The watch is still seeking FDA clearance but will be available later this year.

Sign up for Glyco Care benefits notifications on the Withings website (click "Keep me informed" on the left) to be alerted of pre-orders. The American Heart Association says nearly half of Americans have high Glyco Care blood sugar supplement pressure, which raises the risk of heart attack and stroke - but many sufferers don't realize there's anything wrong. And while heart rate has become easy to monitor with fitness trackers, blood pressure monitors usually take the form of large, awkward cuffs. But now blood pressure tracking comes in a wearable with Omron's HeartGuide, a sleek smartwatch that wouldn't look out off place on anyone's wrist. Essentially, the band is a smaller version of the age-old blood pressure cuff: it inflates to measure your systolic and diastolic pressure with just the tap of a button. Paired with the HeartAdvisor companion app, HeartGuide will track your blood pressure over time and offer insights on what your blood pressure means for your health. And like any good wearable, it will track heart rate, steps, sleep, and other health stats so you can monitor how your blood pressure fits into your overall health.

This isn't your standard smartwatch. Instead of focusing on smartphone connectivity or health monitoring, this Breitling watch is all about getting help in an emergency. On the outside, the Breitling Emergency is a classic luxury wristwatch with a titanium case and a linked band. But inside, it hides a personal emergency beacon that's been miniaturized to fit seamlessly inside a watch. These emergency beacons send messages vis satellite, telling local emergency services that you're in trouble and giving your location. Satellite service means you can get help no matter where you are. While most smartphones have an SOS function to call emergency services or text your emergency contacts, these features require cellular service to function. Personal emergency beacons like the Breitling Emergency aren't so limited, making them perfect for people exploring remote environments, where this watch may be your only way to talk to the outside world. Starting at $16,500 - though they can be found used in the $3,000 range - this watch isn't for the casual outdoorsman.