kitio.aiAstra AI vs SAT Sphere
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Astra AI starts at See pricing page and SAT Sphere starts at $10/mo. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Study plans from your notes
- Flashcards and quizzes
- Auto-generated topic podcasts
- Knowledge gap tracking
- Oral and written mock exams
- Photo upload of notes
- Digital SAT course modules
- 7,000+ review questions
- Personalized study plans
- SAT vocabulary dictionary
- Custom practice exams
- AI study companion
| Feature | Astra AI | SAT Sphere |
|---|---|---|
| Best for | AI tutor that turns your own notes into an exam study plan | Digital SAT prep with lessons, practice questions and an AI tutor |
| Category | Education | Education |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | $10/mo |
| Free plan | Yes | Yes |
| Made by | Astra AI | SAT Sphere |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Astra AI starts at See pricing page and SAT Sphere starts at $10/mo. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- 1 foundational course module
- Introductory SAT materials
Premium
$10/mo
- All SAT course modules
- 7,000+ review questions
- Personalized study plans
- SAT word dictionary
Premium Plus
$15/mo
- Everything in Premium
- Flashcards
- Custom practice exams
- 24/7 AI study companion
Prices in USD, checked Oct 29, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Astra AI
- Lessons based on your own material
- Many study formats in one app
- Mock exams before the real one
- Free to try
- Prices not shown on the homepage
- Quality depends on the notes you upload
- Plan needs an exam date to work best
SAT Sphere
- Low monthly prices
- Free plan to try the course
- University hub for admissions research
- Free plan includes only one module
- AI companion requires Premium Plus
- Focused on the SAT only
Which one should you choose?
Choose Astra AI if you want:
- Lessons based on your own material
- Many study formats in one app
- Mock exams before the real one
Watch out: prices not shown on the homepage.
Choose SAT Sphere if you want:
- Low monthly prices
- Free plan to try the course
- University hub for admissions research
Watch out: free plan includes only one module.
Astra AI vs SAT Sphere FAQ
What is the difference between Astra AI and SAT Sphere?
Astra AI: AI tutor that turns your own notes into an exam study plan. SAT Sphere: Digital SAT prep with lessons, practice questions and an AI tutor. Both are education tools.
Is Astra AI or SAT Sphere cheaper?
Astra AI starts at See pricing page and SAT Sphere starts at $10/mo. Check both pricing pages for current plans.
Do Astra AI and SAT Sphere have free plans?
Astra AI: Yes. SAT Sphere: Yes.
Who makes Astra AI?
Astra AI is made by Astra AI.
Who makes SAT Sphere?
SAT Sphere is made by SAT Sphere.
Which should I choose, Astra AI or SAT Sphere?
Choose Astra AI if you value lessons based on your own material and many study formats in one app. Choose SAT Sphere if you value low monthly prices and free plan to try the course.