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Features, pricing and Editor Score side by side — to help you pick the right education & research tool in 2026.
Quick verdict
On our Editor Score, Mathos AI and R.test land almost level. Pick Mathos AI if you want step-by-step math problem solving; choose R.test for adaptive diagnostic test completed in about 40 minutes. On pricing, Mathos AI is the one with a free or freemium plan, so it's the cheaper place to start.
| Pricing | Freemium | Paid |
| Free tier | ||
| Best for | step-by-step math problem solving | adaptive diagnostic test completed in about 40 minutes |
AI math solver and step-by-step tutor
AI diagnostic tests predicting SAT and ACT scores
Choose Mathos AI if…
Choose R.test if…
Your use case decides this one: Mathos AI leans into step-by-step math problem solving, while R.test is built for adaptive diagnostic test completed in about 40 minutes. Weigh features and pricing for your workflow. Mathos AI is the lower-cost place to start thanks to its free or freemium plan; the other is worth a trial if its feature set fits better.
Neither is universally better — it depends on your budget and which features matter most. The side-by-side breakdown above shows where each one wins.
Mathos AI (freemium) is best for step-by-step math problem solving, while R.test (paid) is best for adaptive diagnostic test completed in about 40 minutes. See the full feature and pricing comparison above.
Mathos AI has a free or freemium plan, so it's the cheaper way to start. For paid plans, check each tool's current pricing on its review page.
Mathos AI is usually the easier starting point thanks to a lower barrier to entry. Beginners should favour a free tier and a simple interface over raw power.
Other head-to-heads in the same category.
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Last updated August 2026. Comparisons are ranked by our Editor Score (features, value and pricing, blended with verified user reviews where a tool has them) — see our methodology.