# Biology Exam vs ECTOR

The clearest difference is in-app purchases: Biology Exam at none against ECTOR's 1. ECTOR's advantage is update cadence (every 9 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ECTOR sells 1 in-app purchase, starting at $4.99 per month. Biology Exam asks for nothing beyond the download.

Biology Exam ships an update every 2 months, ECTOR every 9 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | Biology Exam | ECTOR |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Size | 6 MB | 46 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Martin Tseng](https://appshunter.io/developer/1217065716) | [Wei Sun](https://appshunter.io/developer/1785946634) |

## What reviewers say

### Biology Exam

[App page](https://appshunter.io/ios/app/biology-exam/id6468976354)

**Features:** macOS Compatibility

**In-app purchases:** none


### ECTOR

[App page](https://appshunter.io/ios/app/ector-audition-tracker/id6760742725)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ECTOR Pro Monthly | $4.99 | per month |


## Frequently asked questions

### Is Biology Exam free?

Biology Exam is free to download, with no in-app purchases.

### Is ECTOR free?

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

### Do Biology Exam or ECTOR have ads?

Neither Biology Exam nor ECTOR shows ads.

### Which is updated more often, Biology Exam or ECTOR?

Biology Exam ships an update every 2 months, and ECTOR every 9 days. Most recently, Biology Exam was updated on October 25, 2026 and ECTOR on October 25, 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.*