# Endocrine System Trivia vs HamTester Extra

The clearest difference is update cadence: HamTester Extra at every 6 months against Endocrine System Trivia's every 23 months. HamTester Extra also leads on price ($0.99 vs $2.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Endocrine System Trivia costs $2.99 and HamTester Extra $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Endocrine System Trivia ships an update every 23 months, HamTester Extra every 6 months. The most recent releases landed on October 25, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Endocrine System Trivia | HamTester Extra |
| --- | --- | --- |
| Price | $2.99 | **$0.99** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 23 months | **Every 6 months** |
| Size | 24 MB | 15 MB |
| Requires iOS | 11.0 | **10.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 12+ | 4+ |
| Developer | [Gulsen CAKIR](https://appshunter.io/developer/644171910) | [Gene Backlin](https://appshunter.io/developer/322437954) |

## What reviewers say

### Endocrine System Trivia

[App page](https://appshunter.io/ios/app/endocrine-system-trivia/id878060122)

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

**In-app purchases:** none


### HamTester Extra

[App page](https://appshunter.io/ios/app/hamtester-extra/id1420469092)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Endocrine System Trivia free?

Endocrine System Trivia costs $2.99, with no in-app purchases.

### Is HamTester Extra free?

HamTester Extra costs $0.99, with no in-app purchases.

### Do Endocrine System Trivia or HamTester Extra have ads?

Neither Endocrine System Trivia nor HamTester Extra shows ads.

### Which is updated more often, Endocrine System Trivia or HamTester Extra?

Endocrine System Trivia ships an update every 23 months, and HamTester Extra every 6 months. Most recently, Endocrine System Trivia was updated on October 25, 2026 and HamTester Extra on October 26, 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.*