# Speed Trigonometry vs Mind

The clearest difference is in-app purchases: Speed Trigonometry at none against Mind's 2. Mind's advantage is update cadence (every 5 months vs every 14 months) and iOS requirement (13.0 vs 18.5). On price, ads and device support there is nothing between them.

Both are free to download. Mind sells 2 in-app purchases, starting at $29.99 per year. Speed Trigonometry asks for nothing beyond the download.

Speed Trigonometry ships an update every 14 months, Mind every 5 months. The most recent releases landed on October 7, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Speed Trigonometry | Mind |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/speed-trigonometry/id6747187585/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 5 months** |
| Monetization | **Free** | Freemium |
| Size | 2 MB | 34 MB |
| Requires iOS | 18.5 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nick Petroni](https://appshunter.io/developer/1597208168) | [Emad Arrish](https://appshunter.io/developer/1864743836) |

## What reviewers say

### Speed Trigonometry

[App page](https://appshunter.io/ios/app/speed-trigonometry/id6747187585)

This app helps students quickly memorize the unit circle. It quizzes users on sine, cosine, tangent, and inverse trigonometric values for key angles. Developed by students for students, it's ideal for precalculus learners.

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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Mind

[App page](https://appshunter.io/ios/app/mind-forge/id6757128087)

This app offers a distraction-free learning experience, combining brain training exercises, SAT vocabulary practice, and academic writing tools. Track your progress, improve cognitive skills, and refine your English writing.

**Highlights:** Brain training exercises, SAT vocabulary flashcards, Academic writing tools, Progress tracking, Distraction-free interface, Cognitive skill improvement

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Lifetime | $29.99 | per year |
| Premium Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Speed Trigonometry free?

Speed Trigonometry is free to download, with no in-app purchases.

### Is Mind free?

Mind is free to download, with in-app purchases available.

### Do Speed Trigonometry or Mind have ads?

Neither Speed Trigonometry nor Mind shows ads.

### Which is updated more often, Speed Trigonometry or Mind?

Speed Trigonometry ships an update every 14 months, and Mind every 5 months. Most recently, Speed Trigonometry was updated on October 7, 2026 and Mind on October 16, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*