# Periodic Table Question Bank vs Trigonometry Practice

The clearest difference is update cadence: Trigonometry Practice at every 9 days against Periodic Table Question Bank's every 36 months. Trigonometry Practice also leads on iOS requirement (13.0 vs 18.2). On price, ads, in-app purchases and device support there is nothing between them.

Periodic Table Question Bank costs $0.99 and Trigonometry Practice $0.49 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, Trigonometry Practice every 9 days. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Periodic Table Question Bank | Trigonometry Practice |
| --- | --- | --- |
| Price | $0.99 | **$0.49** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 9 days** |
| Size | 2 MB | 20 MB |
| Requires iOS | 18.2 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Prachi Pimpalkhare](https://appshunter.io/developer/359099311) | [Manish Kumar](https://appshunter.io/developer/1854995154) |

## What reviewers say

### Periodic Table Question Bank

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Trigonometry Practice

[App page](https://appshunter.io/ios/app/trigonometry-practice/id6755685152)

**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 Trigonometry Practice free?

Trigonometry Practice costs $0.49, with no in-app purchases.

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

Neither Periodic Table Question Bank nor Trigonometry Practice shows ads.

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

Periodic Table Question Bank ships an update every 36 months, and Trigonometry Practice every 9 days. Most recently, Periodic Table Question Bank was updated on October 12, 2026 and Trigonometry Practice on October 15, 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.*