# Periodic Table Question Bank vs Speed Trigonometry

The clearest difference is price: Speed Trigonometry at Free against Periodic Table Question Bank's $0.99. Speed Trigonometry also leads on update cadence (every 14 months vs every 36 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Speed Trigonometry is free to download; Periodic Table Question Bank costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Periodic Table Question Bank ships an update every 36 months, Speed Trigonometry every 14 months. The most recent releases landed on October 27, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Periodic Table Question Bank | Speed Trigonometry |
| --- | --- | --- |
| Price | $0.99 | **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 | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 14 months** |
| Monetization | — | Free |
| Size | 2 MB | 2 MB |
| Requires iOS | **18.2** | 18.5 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Prachi Pimpalkhare](https://appshunter.io/developer/359099311) | [Nick Petroni](https://appshunter.io/developer/1597208168) |

## What reviewers say

### Periodic Table Question Bank

[App page](https://appshunter.io/ios/app/periodic-table-question-bank/id434044942)

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Periodic Table Question Bank free?

Periodic Table Question Bank costs $0.99, with no in-app purchases.

### Is Speed Trigonometry free?

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

### Do Periodic Table Question Bank or Speed Trigonometry have ads?

Neither Periodic Table Question Bank nor Speed Trigonometry shows ads.

### Which is updated more often, Periodic Table Question Bank or Speed Trigonometry?

Periodic Table Question Bank ships an update every 36 months, and Speed Trigonometry every 14 months. Most recently, Periodic Table Question Bank was updated on October 27, 2026 and Speed Trigonometry on October 7, 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.*