Publishing new update - can some older devices be restricted from the update?

IcedBIcedB Member, PRO Posts: 384
edited October 2012 in Working with GS (Mac)
Hi,
I've made a big update to an app and it now uses up to 40% more ram. The previous version was quite succeful and I don't want to cut any users off who have 3GS.
Is it possible to restrict people who don't have iphon4+ from making the update?
Or should I just release a next version?
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