kitio.aiR.test vs SAT Sphere
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. R.test 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
- Adaptive diagnostic tests
- Digital SAT question bank
- ACT practice sets
- Visual explanations
- Score reports
- Digital SAT course modules
- 7,000+ review questions
- Personalized study plans
- SAT vocabulary dictionary
- Custom practice exams
- AI study companion
| Feature | R.test | SAT Sphere |
|---|---|---|
| Best for | Adaptive SAT and ACT practice tests with score reports in 40 minutes | 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 | R.test | SAT Sphere |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
R.test 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
R.test
- Score estimate in about 40 minutes
- Covers SAT, ACT and PSAT
- Reports useful to tutors and counselors
- Some question sets need a paid upgrade
- AP tests are not available yet
- Prices are not shown in the reviewed pages
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 R.test if you want:
- Score estimate in about 40 minutes
- Covers SAT, ACT and PSAT
- Reports useful to tutors and counselors
Watch out: some question sets need a paid upgrade.
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.
R.test vs SAT Sphere FAQ
What is the difference between R.test and SAT Sphere?
R.test: Adaptive SAT and ACT practice tests with score reports in 40 minutes. SAT Sphere: Digital SAT prep with lessons, practice questions and an AI tutor. Both are education tools.
Is R.test or SAT Sphere cheaper?
R.test starts at See pricing page and SAT Sphere starts at $10/mo. Check both pricing pages for current plans.
Do R.test and SAT Sphere have free plans?
R.test: Yes. SAT Sphere: Yes.
Who makes R.test?
R.test is made by R.test.
Who makes SAT Sphere?
SAT Sphere is made by SAT Sphere.
Which should I choose, R.test or SAT Sphere?
Choose R.test if you value score estimate in about 40 minutes and covers sat, act and psat. Choose SAT Sphere if you value low monthly prices and free plan to try the course.