xcode - How many versions back is it common to test iOS apps? -

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is common test apps compatibility older ios versions (in case, ios 4.3 apps ios 2.x)? or apps tested 1 version or so. idea percentage of ios market lost me if app doesn't work on older versions? i'm guessing miniscule amount, seems enough employer ask me distant backwards compatibility -_-

this varies quite bit app-to-app, depending on features being used , broadness/niche-ness of market. broadest should target is: current release, previous "dot" release, last version of previous major release. (now, 5.0 not yet released, 4.3, 4.2, 3.2 (which ipad only, 3.1.3 iphone/ipod).

my suggestion never need support more this. if product doesn't work on 3.0, user can update free. of course older hardware doesn't update, , if market "people getting left behind" (which doesn't overlap "people spending money in app store") can support older.

some support newer because of powerful features being used in newer releases. 4.0 had lot of great additions (blocks/gcd/multitasking among them). leave 3.x behind can.

if audience push-the-edge crowd, can support latest (4.3, 4.2 right - realistically, there's not huge api differences there).

i have app targeted @ 5.0 not support older, newer apis central.

as far testing, if have oldest hardware smallest ram think targeting, test. cpu , memory can pushed on those.


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