Boy...you think there would be a spreadsheet somewhere that shows WP list and the ios and Android counterpart features (if applicable).
Very few lags. I used ios and android. My L920 is 1,5 year old, and there's no lags.
My iphone 4 was 1 year old and was already laggy.
Same with my Samsung galaxy S3.
One important advantage WP has is uniform hardware which enables hassle-free timely updates for all devices (exception being the lumia 810 which was abandoned by t-mobile, even so developer preview acts as a workaround for this).
Every WP device can be on the latest version of the OS. Android is notoriously terrible at this.
Tiles are semi-unique. There's no "pre-launch display panel" idea on iOS. Android has widgets, but the uptake of widgets appears to be less than the use of live tiles. (I'm not one who believes that live tiles are an alternative for a notification center. However, tiles can convey key information instantly, saving users from having to jump in an out of apps.)
The concept of secondary tiles, that is, additional icons that can take a user directly to a particular part of an app. They are effectively app bookmarks and they aren't available in iOS or Android. (Yes, one could write lots of widgets for Android to achieve this, but few apps do.) Our app really exploits this, providing users links to any part of the app. In the image below, we show the main tile and secondary tiles to take students directly to their grades, course list, schedule, bus schedule, campus map, announcements, and even a specific class.
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ManicottiK that was very true ! I'd like to add, live tiles are unique ! By unique i mean, they haven't been seen anywhere else before wp7.
In case of iOS, their home screen was basically the menu screen of all java phones of that era. Android just copied iOS, and gave some freedom to devs who made various designs of the home screen/app drawer. But all that wasn't revolutionary. Live tiles is the only revolutionary idea in the phone OS market.
That's unfair to the concept of widgets: they are unique as well. They offer a way of interacting with an app without actually opening it. That's pretty nifty too. However, the approach of tiles is different. Tiles are basically re-invented icons, as they are still "shortcuts" to apps, but their way of referring to the apps is different. In a way, they are "windows" to apps as they offer a way to see what is going on in the app, without actually opening it.