More or less the same. Both can be used in daily speaking and writing.

They are the same. And they both are commonly used.

温习是及时性的，比如最近刚学的东西，可以说温习一下，如果是久远一点的，应该说复习。个人理解，不一定正确。

Hi! There is no difference in meaning，though 温习sounds more literary while 复习is more colloquial and commonly used in daily conversations. Anyway, they are both common and frequently used Chinese words. Generally you can use them interchangeably. Hope that helps😊