# Speed Trigonometry — Memorize the Unit Circle

> App for memorizing unit circle trigonometric values for precalculus students. (iPhone/iPad app by Nick Petroni.)

- Source: https://appshunter.io/ios/app/speed-trigonometry/id6747187585 (this page in markdown: same URL + `.md`)
- Developer: [Nick Petroni](https://appshunter.io/developer/1597208168)
- Category: Education, Games
- Price: Free
- Rating: 4.80/5 from 5 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.5 · 2 MB
- Languages: American English
- Released: 2025-06-12
- Data updated: 2026-08-08
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/speed-trigonometry/id6747187585/reviews.md

## What is Speed Trigonometry?

Speed Trig is the #1 app for memorizing the unit circle fast. Designed for students enrolled in Precalculus, the app quizzes you on the sine, cosine, tangent, and inverse trig values of the four main unit circle angles: π/2, π/3, π/4, and π/6.  Our app was made by students, for students.

## Key features

- Unit circle memorization
- Quizzes on trig values
- Focus on key angles
- Sine, cosine, tangent, inverse values
- Student-developed

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/speed-trigonometry/id6747187585/reviews.md

### 4/5 — Amazing! but one thing.

*2026-03-13*

As someone enrolled in pre-calculus this was a huge help for me near the beginning of the year! but there is one feature I would love to recommend, such as picking what identities you want to practice. When I started off trying to memorize the unit circle I kept getting values like cot, sec, csc when I was just trying to practice the basic cos and sin and it would mess up my scores because I wasnt prepared for those values yet. I would recommend makinga feature where you can pick which identites you want to practice such as only doing sec, and csc, but not cos, tan, and sin Idk maybe its stupid but I feel like it would be good for students who are trying to strengthen a certian area and not just leaving them out in a trigonometry battlefield.

**Developer response:** Thanks for the feedback! We're glad the app helped you in pre-calc.

That's a great suggestion, and we're actually working on a feature like this right now. Being able to choose which identities to practice should make it easier to focus on specific topics. Thanks for taking the time to share your idea!

## Frequently asked questions about Speed Trigonometry

### What is Speed Trigonometry?

Speed Trigonometry is an educational app designed to help students memorize the unit circle. It quizzes users on sine, cosine, tangent, and inverse trigonometric values for specific angles.

### Who is Speed Trigonometry for?

This app is specifically designed for students taking Precalculus or similar math courses who need to master unit circle memorization.

### What trigonometric values does Speed Trigonometry cover?

Speed Trigonometry quizzes users on the sine, cosine, tangent, and inverse trig values for the four main unit circle angles: π/2, π/3, π/4, and π/6.

### Is Speed Trigonometry free to use?

Yes, Speed Trigonometry is completely free to download and use. It does not have any in-app purchases or advertisements.

### What devices does Speed Trigonometry support?

Speed Trigonometry is available for iPhone and iPad devices.

### How often is Speed Trigonometry updated?

Speed Trigonometry was last updated on June 12, 2025, with version 1.0. Future updates will depend on developer plans.

### What is the age rating for Speed Trigonometry?

Speed Trigonometry has an age rating of 4+, making it suitable for a wide range of users.

### Does Speed Trigonometry offer certifications?

Speed Trigonometry focuses on memorization and practice of unit circle values. It does not currently offer any formal certifications.

## Version history (last 2 releases)

### 1.1 — 2026-08-06

VERSION 1.1 - Added ability to select which identities you want to practice for each session

### 1.0 — 2025-06-12

No release notes.

## Apps similar to Speed Trigonometry

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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| [Beautiful Trigonometry](https://appshunter.io/ios/app/beautiful-trigonometry/id6746460113) | — | Free | Education |
| [The Unit Circle App](https://appshunter.io/ios/app/the-unit-circle-app/id6752369385) | — | Free | Education |
| [Touch Trigonometry](https://appshunter.io/ios/app/touch-trigonometry/id6758712159) | — | Free | Education |
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## More apps by Nick Petroni

- [Fluent - Math Fluency](https://appshunter.io/ios/app/fluent-math-fluency/id1597208166)
- [Impostor - Deduction Game](https://appshunter.io/ios/app/impostor-deduction-game/id6749185258)

All apps by Nick Petroni: https://appshunter.io/developer/1597208168

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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 2026-08-08.*