Visual diagrams, step-by-step examples, a 24/7 private tutor, and adaptive practice. Works alongside Stewart, Blitzer, Sullivan, Larson, OpenStax, and any standard precalculus course.
No account required. No credit card. Everything unlocked during beta.
657+
Practice problems across 13 chapters
68
Sections with step-by-step solutions
24/7
Private tutor, always available
13
Chapters covering all of precalculus
Six steps from first concept to exam confidence. You can start right now — no account, nothing to install.
13 chapters, 68 sections, aligned to Stewart, Blitzer, Sullivan, Larson, OpenStax, and any standard precalculus course. Start at the beginning or jump straight to what your class is covering.
Browse chapters →Every concept opens with an SVG diagram that shows what the math actually means — before you encounter a formula. Graphs, transformations, triangles, unit circle — you see it first, then you learn it.
See example diagrams →Step-by-step solutions with self-check prompts. Cover the next step, try it yourself, then reveal it. This is active recall — the method proven to build real understanding instead of just recognizing answers.
Try a worked example →Stuck on a step? Ask in plain English. Your private tutor explains it differently until it clicks - Socratic questions, alternative approaches, worked examples on demand. Available 24/7, zero judgment.
See how the tutor works →657+ adaptive practice problems that target your weak spots. Spaced repetition brings back material right before you would forget it — not all at once. Your mastery score updates in real time.
See practice problems →Timed, no hints, scored. Simulate exactly what test day feels like. Know where you stand before you walk into the room — not after.
Try exam mode →No account. No credit card. Start in 10 seconds.
Available in every section, on every problem. It explains concepts in plain English, walks through steps one at a time, and pinpoints exactly where your reasoning went sideways.
It won't just give you the answer. It'll make sure you understand why.
In one app, on any device, available the night before the test.
SVG diagrams for all 13 chapters show what formulas mean. Searchable formula reference and printable cram sheets.
Work through problems one step at a time with self-check prompts. Real understanding, not memorization.
Formula flashcards with spaced repetition. Timed speed drills at three difficulty levels to build fast recall.
Section and chapter tests with progress tracking. Full timed exam mode. Drill only your missed questions or weak concepts.
The SM-2 algorithm shows each concept right before you'd forget it. 10 minutes a day locks it in permanently.
Automatic concept-level accuracy tracking. See exactly which wrong answers tripped you up and why. Personalized study plan.
Ask anything in plain English. Adapts to how you learn, with infinite patience.
Set your exam date, get a day-by-day schedule. Automatically prioritizes your weakest sections.
Every feature maps to a peer-reviewed learning principle.
Retrieval Practice
2–4x better retention than re-reading
Spaced Repetition
Review at the right intervals, not all at once
Cognitive Load Theory
Diagrams before definitions, scaffolded hints
Growth Mindset
"Not yet" language, effort praise, no shame
Honest look at what you get — and don't — with each option.
| Free Videos | Subscription Apps | Private Tutor | NailTheTest | |
|---|---|---|---|---|
| Cost | Free | $10–30/mo | $40–100/hr | Free (beta) |
| No subscription | ✓ | ✗ | ✓ | ✓ |
| Visual diagrams | ✗ | Some | ✓ | ✓ |
| Personalized practice | ✗ | ✓ | ✓ | ✓ |
| AI explanations 24/7 | ✗ | Some | ✗ | ✓ |
| Aligned to your textbook | ✗ | ✗ | Varies | ✓ |
| Parent dashboard | ✗ | ✗ | ✗ | ✓ |
| Study planner | ✗ | ✗ | ✗ | ✓ |
| Available anytime | ✓ | ✓ | ✗ | ✓ |
The parent dashboard shows exactly what your student is studying, their mastery scores, how long they spend, and their streak. Send encouragement notes that appear in the app. The AI generates an honest progress summary — not a sales pitch.
View Parent DashboardEvery feature, every chapter, every tool — fully unlocked, no account required. We're building this in public and want real feedback from real students before we finalize pricing.
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Pick any chapter. See the diagram. Work through an example. Try a practice problem. It takes 20 minutes to see the difference.
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