Jumping in because I went through this exact same search last year for my nephew. We spent ages testing different apps because he gets bored so fast. I found that while some stuff claims to be AI, it is really just fancy flashcards. We ended up sticking with two that felt a bit more adaptive to how he was actually learning.

• Duolingo ABC Reading and Phonics App

Pros: Its totally free and uses that gamified streak system to keep them coming back.
Cons: Focuses heavily on the basics, so it might be too simple if she is already a strong reader.

• Night Zookeeper Writing and Creative Arts Platform

Pros: This uses AI to provide feedback on stories they write. It really helped him move past one-sentence answers.
Cons: Its roughly $12 a month, though you can usually find a half-off code for the first year. Honestly, the cost adds up fast if you arent careful, so I usually look for those annual subscription deals during back-to-school sales. They usually drop the price significantly right around now. I think we paid like sixty bucks for the whole year of Night Zookeeper which fits your budget.

Honestly, finding good AI for 2nd graders is actually pretty frustrating right now. Most of the stuff out there is just a lazy wrapper for ChatGPT and they feel way too glitchy for the price. I tried Khan Academy Khanmigo for Kids and it was a letdown... way too much hand-holding and it stalled out constantly. If you want something that actually works for that age:

• Ello AI Reading Coach Subscription is probably the best for reading. It listens to her read out loud and helps with phonics.
• Amira Learning Home Edition is another decent one for fluency, tho the interface is a bit dated.
• Prodigy Education Math Membership uses adaptive tech that works better than most AI tutors for 2nd grade math. Stick to things built specifically for literacy. Giving a 7 year old raw ChatGPT is just asking for trouble, plus it hallucinates math answers all the time. Not worth the headache.