Thursday, August 16, 2018

usability - Is the small alphabetical index on mobile phone lists usable


I'm working on several mobile filters with long lists and wondering if this pattern that's been used in most mobile phone contact lists is actually usable? It seems too small to get an accurate press on any letter in the list. What's your take on this? If normally users are using this for their usual mobile tasks on the native OS then it should be a good pattern to adapt, right?


Illustration of the optional index along the right edge




Answer



Personally I use this all the time. While it would seem too difficult to have accuracy these are actually treated like a smart scrollbar that scrolls not by pixels but by letters. Users are able to drag down on the letters to pinpoint the letter that they would like.


If you have the resources to build this in your project I would say that it would be highly beneficial.


Like Jonas Dralle said this feature is not just available on ios but also on android (other systems too). Depending on how big your lists are it may be better to add advanced search rather than this (or maybe in addition to this). It all depends on what kind of data you are handling, the larger and more complex the data the better it would be to use search. If the data is too small users might feel overwhelmed by the extra ui elements.


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