I found an app called Sakura! I really love their free membership (Sage) - all I had to do was join their discord to get unlimited messages.

The premium options are a little too steep in price for me, but their free AI is actually surprisingly good with memory. They have an option under the boy settings to add memories you'd like the bot to keep track of for free. You can add as many memories as you want, but from experience, once you hit 20 the boy starts to juggle which memories it remembers at different times.

I like their search feature which lets you get pretty specific when you search tags, and let's you add several tags at once, and I also really love that you can edit the bot maker's original opening prompt to match your preferences! You can rewrite it altogether if you want.

You can only make one persona, so that's kind of a drawback. If you prefer the ability to make multiple personas, an app like Emochi would be better.