Correct math. Safe students.
When you put your brand on a math app, two things have to be beyond doubt: the answers are right, and student data is protected. Kimsa is engineered for both — and tested for both on every change.
Figures from the engine's automated test suite, which runs on every change.
Verified on every change
✓ Machine-audited engine
Thousands of generated items are checked automatically for a valid answer key, four distinct options, and no calculator-style decimals — with zero tolerance for hard failures.
✓ Exact grading
Answers are graded deterministically and accept equivalent forms, so a correct answer written differently is never marked wrong — and a wrong one is never accepted.
✓ Diagnostic distractors
Each wrong choice maps to one named misconception, so results teach — and every option is validated against that catalog.
✓ Stable exams
The timed exams are locked and regression-tested, so a content change can never silently alter a placement or practice test.
Private by design — built for schools
✓ No personal data
The engine needs no name, email, or personal detail to work. There's nothing sensitive to collect, store, or breach.
✓ On-device first
Progress lives on the student's device. Cloud sync is optional and privacy-safe.
✓ Never loses work
Sync is union-merge — combining both sides — so a student's history and mastery can't be overwritten or dropped.
✓ FERPA / COPPA-friendly posture
A no-PII design makes district and minor deployments far simpler. You control any account layer you add on top.
Kimsa provides the engine and its privacy posture; your legal/compliance obligations depend on how you deploy and what account or billing layer you add.
Accessibility: this site and the Kimsa app are built to WCAG 2.1 AA and re-checked with automated audits on every change. If anything is hard to use with assistive technology, tell us at support@kimsa.ai and we'll fix it.