# CalculusOne — Calculus you can actually see

> Calculus you can actually see (iPhone/iPad app by KEVIN CAISSIE.)

- Source: https://appshunter.io/ios/app/calculusone/id6791156285 (this page in markdown: same URL + `.md`)
- Developer: [KEVIN CAISSIE](https://appshunter.io/developer/6791150591)
- Category: Education, Books
- Price: $3.99
- Age rating: 4+
- Requires: iOS 17.6 · 3 MB
- Languages: American English
- Released: 2026-07-23
- Data updated: 2026-09-07
- User reviews in markdown: https://appshunter.io/ios/app/calculusone/id6791156285/reviews.md

## What is CalculusOne?

Calculus 1, taught the way it should be — real explanations, visuals you can interact with, and enough practice to actually master it.
CalculusOne is the full Calculus 1 course in your pocket: 130 lessons across four parts, structured like a real university course 
-The essential foundations before Calculus 1 (12 lessons)
-Limits and derivatives (61 lessons)
-Differentiation rules (35 lessons)
-Derivatives and their applications (22 lessons)

Every lesson pairs a clear explanation with an interactive activity built right into the page. Pull a secant line toward a tangent and watch a limit take shape. Drag a point around a circle to feel implicit differentiation. Watch a curve recolor itself as its derivative changes sign. This isn't a textbook with pictures — it's calculus you can actually see move.

WHAT'S INSIDE
-130 lessons, fully interactive, with clean, properly formatted math notation throughout
-Dozens of hands-on graphs and simulations woven into the lessons
-1,000+ practice problems, each with hints and a full worked solution
-Four part exams plus a comprehensive final — real, graded, university-style testing
-Flashcards to drill key definitions and results
-Progress tracking: streaks, completed lessons, and bookmarks for quick review
-Full light and dark mode

Built for focus, not distraction
CalculusOne works completely offline. No account, no sign-in, no ads, nothing tracked or sent anywhere — just you and the material. Study on a plane, underground, or wherever the Wi-Fi isn't.


## Version history (last 2 releases)

### 1.0.1 — 2026-07-24

Updated App Store screenshots to better showcase CalculusOne’s learning, practice, and exam features.

### 1.0 — 2026-07-22

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-07.*