Over the years, we’ve developed an excellent strategy that should help any Apple user understand when it’s best to repair, upgrade or replace their device. Please look at our article on device economics that we lovingly call “The Rule of Maximums.”

We set out to create a mathematical rule that gives you a theoretical maximum number to spend on a repair or upgrades. There are several exceptions to the rule — most importantly, the way you use the device. If you have any questions, or would rather not do the math, just let us know and we’ll help.