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Tachymeter scale on a Citizen watch bezel. A tachymeter (pronounced / t æ ˈ k ɪ m ə t ər /) is a scale sometimes inscribed around the rim of an analog watch with a chronograph.It can be used to conveniently compute the frequency in inverse-hours of an event of a known second-defined period, such as speed (distance over hours) based on travel time (distance over speed), or measure distance ...
During its debut, the first generation Apple Watch needed to be paired with an iPhone 5 or later running iOS 8.2 or later; this version of iOS introduced the Apple Watch app, which is used to pair the watch with an iPhone, customize settings and loaded apps, and highlight compatible apps from the App Store. [52] The Apple Watch is capable of ...
The iPhone App Store opened on July 10, 2008. [10] [11] [12] On July 11, the iPhone 3G was released and came pre-loaded with support for App Store. [13] [14] Initially apps could be free or paid, but then in 2009, Apple added the ability to add in-app purchases [15] which quickly became the dominant way to monetize apps, especially games.
watchOS is the operating system of the Apple Watch, developed by Apple.It is based on iOS, the operating system used by the iPhone, and has many similar features. [4] It was released on April 24, 2015, along with the Apple Watch, the only device that runs watchOS. watchOS exposes an API called WatchKit for developer use.
Apple Books – an e-book reading and store application [192] (previously known as iBooks until iOS 12 and macOS Mojave) [193] Find My – an asset tracking app and service utilising Bluetooth and UWB [194] [195] [196] Font Book – a font manager [197] [198] Launchpad – an application launcher [199] [200] Apple Maps – a web mapping app and ...
The first digital watch was the Pulsar, introduced by the Hamilton Watch Company in 1972. The "Pulsar" became a brand name, and would later be acquired by Seiko in 1978. In 1982, a Pulsar watch (NL C01) was released which could store 24 digits, likely making it the first watch with user-programmable memory, or the first "memorybank" watch.
Tachymeter may refer to: Tachymeter (survey) or tacheometer, a type of theodolite used for rapid measurements of distance Tachymeter (watch) , a scale sometimes inscribed around the rim of an analogue watch
The tape recorder's drive electronics use signals from the tachometer to ensure that the tape is played at the proper speed. The signal is compared to a reference signal (either a quartz crystal or alternating current from the mains). The comparison of the two frequencies drives the speed of the tape transport. When the tach signal and the ...