What ChatGPT like products have memory?

You know how ChatGPT can keep awareness of conversation, but only for a while? And there is no cross-chat awareness at all. So, are there any AI products that adress this issue? I'm specifically interested in language education products, but please do share any if you know one. For example, what do I mean by awareness of past conversations, "teacher memory" in short. Say I'm learning English and use ChatGPT to define unknown words. An example of teacher memory would be if the chat would use words I have asked them to define in the past in new conversations. Thus facilitating Retrieval Practice.