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Apple yesterday released WatchKit, a toolkit for developing apps for the Apple Watch. We didn't know too much until now, at Apple's keynote the features of the watch were rather shallow, and it was no different in the showroom after the end, where only Apple employees could operate the Watch on their wrists. What other information do we know about Apple Watch now?

Only the extended hand of the iPhone… for now

There were many questions in the air. One of the biggest was about the Watch working without an iPhone. We now know that the standalone Watch will be able to tell the time and maybe a little more. In the first phase at the beginning of 2015, the application will not run on the Watch at all, all computing power will be provided by the currently paired iPhone through the iOS 8 extension. The Watch itself will only be a kind of tiny terminal rendering the UI. All these limitations result from the limited battery capacity in such a titration device.

Apple's documentation mentions the Watch as an addition to iOS, not a replacement for it. According to Apple, fully native apps for the Watch should come later next year, so in the future calculations should also take place on the watch. Apparently, there is nothing to worry about, just remember that when the first iPhone was launched, there was no App Store at all, which was launched only a year later. Until iOS 4, the iPhone could not multitask. A similar iterative development can be expected for the Watch as well.

Two sizes, two resolutions

As has been known since the introduction of the Watch, the Apple Watch will be available in two sizes. The smaller variant with a 1,5-inch display will have dimensions of 32,9 x 38 mm (referred to as 38 mm), a larger variant with a 1,65-inch display then 36,2 × 42 mm (referred to as 42 mm). The display resolution could not be known until WatchKit was released, and as it turns out, it will be dual - 272 x 340 pixels for the smaller variant, 312 x 390 pixels for the larger variant. Both displays have a 4:5 aspect ratio.

Small differences in the size of the icons are also related to this. The notification center icon will be 29 pixels in size for the smaller model, 36 pixels for the larger model. Similar is the case with Long Look notification icons – 80 vs. 88 pixels, or for application icons and Short Look notification icons – 172 vs. 196 pixels. It's a bit more work for the developers, but on the other hand, from the user's point of view, everything will be perfectly consistent regardless of the size of the Watch.

Two types of notifications

As mentioned in the previous paragraph, the Apple Watch will be able to receive two types of notifications. The initial First Look notification appears when you briefly raise your wrist and look at the display. Next to the application icon, its name and short information is displayed. If a person stays in this position for a long enough time (probably a few seconds), a secondary Long Look notification will appear. The icon and name of the application will move to the top edge of the display and the user can scroll down to the action menu (for example, "I like" on Facebook).

Helvetica? No, San Francisco

On iOS devices, Apple has always used the Helvetica font, starting with iOS 4 Helvetica Neue and switching to the thinner Helvetica Neue Light in iOS 7. The transition to slightly modified Helvetica also took place this year with the arrival of OS X Yosemite and its flatter graphical interface. One would automatically assume that this familiar font would also be used in the Watch. Bridge bug - Apple has created a brand new font for the Watch called San Francisco.

A small display makes different demands on the font in terms of its readability. In larger sizes, San Francisco is slightly condensed, saving horizontal space. Conversely, at smaller sizes, the letters are further apart and have larger eyes (e.g. for the letters a a e), so they are easily recognizable even at a quick glance at the display. San Francisco has two versions - "Regular" and "Display". Coincidentally, the first Macintosh also contained a font with the name San Francisco on it.

Glances

This functionality was already discussed at the keynote – it is a kind of bulletin board in which you move from left to right between information from installed applications, whether it is the weather, sports results, the weather, the number of remaining tasks or anything else. A condition for Glances is the necessity to fit all information to the size of the display, vertical scrolling is not allowed.

No custom gestures

The entire interface is essentially locked into the state Apple wants it to be in – consistent. Scrolling vertically scrolls the content of the application, scrolling horizontally allows you to switch between application panels, tapping confirms a selection, pressing opens a context menu, and the digital crown enables faster movement between panels. Swiping from the left over the edge of the display is used to navigate back, but the same from below the Glances opening. This is how the Watch is controlled and all developers must follow these rules.

Static map previews

Developers have the option to place a map section in their application, or place a pin or label in it. However, such a view is not interactive and you cannot move around on the map. Only when you click on the map does the location appear in the native Maps app. Here it is possible to observe the limitations of the product of the first version, which, instead of enabling everything, can only do something, but at 100%. We can probably expect improvement in this direction in the future.

Sources: Developer.Apple (1) (2), The Verge, The Next Web
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