# Rectangle Detection vs Biology Helper

The clearest difference is in-app purchases: Rectangle Detection at none against Biology Helper's 2. Biology Helper's advantage is ads (none vs shown) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. Biology Helper sells 2 in-app purchases, starting at $4.99 per 7 days. Rectangle Detection asks for nothing beyond the download.

## The numbers

| Metric | Rectangle Detection | Biology Helper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/biology-helper-solver-answer/id6738664176/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | — |
| Monetization | — | Subscription |
| Size | 36 MB | 7 MB |
| Requires iOS | 17.7.2 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Michael Cabo](https://appshunter.io/developer/1779065708) |

## What reviewers say

### Rectangle Detection

[App page](https://appshunter.io/ios/app/rectangle-detection/id6511216798)

**Features:** macOS Compatibility

**In-app purchases:** none


### Biology Helper

[App page](https://appshunter.io/ios/app/biology-helper-solver-answer/id6738664176)

This app uses advanced AI to solve biology questions instantly. Get detailed, step-by-step explanations for complex life science concepts, whether you type your question or upload a photo. Save your solved questions for later and share results with others.

**Highlights:** AI-powered biology question solving, Text and photo question input, Detailed step-by-step explanations, Learning history for solved questions, Shareable results, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Biology Helper Weekly Trial | $4.99 | per 7 days |
| Biology Helper Weekly Pro | $4.99 | per 7 days |


## Frequently asked questions

### Is Rectangle Detection free?

Rectangle Detection is free to download, with no in-app purchases.

### Is Biology Helper free?

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

### Do Rectangle Detection or Biology Helper have ads?

Rectangle Detection shows ads; Biology Helper does not.

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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.*