# Trigonometry Toolkit by CS

> Trigonometry Toolkit by CS (iPhone/iPad app by ChatStick Company Limited.)

- Source: https://appshunter.io/ios/app/trigonometry-toolkit-by-cs/id6760443966 (this page in markdown: same URL + `.md`)
- Developer: [ChatStick Company Limited](https://appshunter.io/developer/1165816085)
- Category: Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 10 MB
- Languages: English
- Released: 2026-03-15
- Data updated: 2026-07-09
- User reviews in markdown: https://appshunter.io/ios/app/trigonometry-toolkit-by-cs/id6760443966/reviews.md

## What is Trigonometry Toolkit by CS?

Trigonometry Toolkit helps students learn faster by combining visual tools, calculators, and practice in one clean app.

Core tools:
• Interactive Unit Circle: Drag and explore angles, sin/cos/tan values, quadrants, reference angles, and exact values.
• Right Triangle Solver: Solve sides, angles, area, and perimeter quickly.
• General Triangle Solver (Premium): Solve SSS, SAS, ASA, AAS, and SSA (ambiguous case).
• Degree/Radian Converter: Convert instantly in both directions.
• Exact Value Finder: Check common exact trig values.
• Trig Identities: Search and review identities with examples.
• Graphing Tool: Plot trig functions and transformations.
• Reference Angle, Coterminal, Arc Length & Sector Area calculators.

Practice features:
• Category-based quizzes with Easy / Medium / Hard levels.
• Daily Challenge mode (5 mixed questions).
• Performance insights: streak, best streak, attempts, and average accuracy.
• Recent activity and continue-learning flow.

Reference and study support:
• Formula list with category filters and search.
• Save favorites and review recent history.
• Built-in reference pages for key identities and graph rules.

Premium (one-time purchase):
• Remove ads
• General Triangle Solver
• Advanced graphing options
• Unlimited quizzes
• Detailed explanations
• Unlimited history and favorites
• Access to premium identity sets and future premium updates

Designed for learners, exam prep, and classroom support.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock All Features + Remove Ads | $1.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-03-15

No release notes.

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All apps by ChatStick Company Limited: https://appshunter.io/developer/1165816085

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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 2026-07-09.*