In June 2000, IBM displayed a prototype for a wristwatch that ran Linux. The original version had only 6 hours of battery life, which was later extended to 12.[20] It featured 8 MB of memory and ran Linux 2.2.[21] The device was later upgraded with an accelerometer, vibrating mechanism, and fingerprint sensor. IBM began to collaborate with Citizen Watch Co. to create the "WatchPad". The WatchPad 1.5 features a 320 × 240 QVGA monochrome touch sensitive display and runs Linux 2.4.[22][23] It also features calendar software, Bluetooth, 8 MB of RAM and 16 MB of flash memory.[24][25] Citizen was hoping to market the watch to students and businessmen, with a retail price of around $399.[25] Epson Seiko introduced their Chrono-bit wristwatch in September 2000. The Chrono-bit watches feature a rotating bezel for data input, synchronize PIM data via a serial cable, and can load custom watch faces.[26]
Apple Watch (1st generation and Series 1)	Apple	watchOS	No	8.2+ (1st generation) 10.0+ (Series 1)	Apple S1 (1st generation) Apple S1P	4.0 LE	] From paired iPhone	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	IPX7	Digital	1.7 / 1.5	319x390 / 272x340		AMOLED	1.5	250 / 205	Lithium-ion	42 mm / 38 mm	12.46 / 12.3	36.2 / 32.9	Varies	Yes	Yes	No

Dealing with notifications on a Wear OS watch has gotten better as the phone version of Android has improved its already impressive notification system and as phone app developers have taken advantage of new interactions. Many apps now send notifications with action options: For example, you can check a to-do as done, approve a payment, respond to a message, or, most often, just acknowledge something. The Q Explorist and Venture are no different than most Wear OS watches in relaying notifications, but in our testing they rarely showed lag in processing them, nor was either watch’s screen unresponsive to swiping or tapping options. Each watch’s vibration motor provides just enough buzz and movement to avoid missing things while not feeling like electric collar training for humans.
Google confirmed to Tom's Guide that the company won't be releasing its own Wear OS smartwatch this year. The news comes after months of rumors that a Google-branded Pixel Watch running on Qualcomm's latest processor would be launched at Google's October hardware event. Instead, Google plans to focus on adding features to Wear OS on the software side and support the companies who are currently making Android smartwatches. Google's hardware event is Oct. 9.