# Nori vs Protein Sequence Viewer

The clearest difference is in-app purchases: Protein Sequence Viewer at none against Nori's 6. Protein Sequence Viewer also leads on update cadence (every 2 days vs every 4 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Nori sells 6 in-app purchases, starting at $3.99 per 7 days. Protein Sequence Viewer asks for nothing beyond the download.

Nori ships an update every 4 days, Protein Sequence Viewer every 2 days. The most recent releases landed on October 8, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Nori | Protein Sequence Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (4 ratings)](https://appshunter.io/ios/app/nori-homework-helper/id6451043783/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 4 days | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 73 MB | 25 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ALLIANCE CUBE CONSULTATION LIMITED](https://appshunter.io/developer/1696278858) | [Kazunari Sasaki](https://appshunter.io/developer/1857860050) |

## What reviewers say

### Nori

[App page](https://appshunter.io/ios/app/nori-homework-helper/id6451043783)

This app acts as a personal study assistant by scanning or typing assignments to provide explanations and solutions. It offers help across various subjects, including math, English, and science, and can test your knowledge. An optional VIP upgrade unlocks additional features and removes ads.

**Highlights:** Scan and upload assignments, Get explanations for problem topics, Receive solution suggestions, Summarize information, Speech recognition for input, Text rewriting and translation, Knowledge testing and study tips

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Homework Helper Plus | $3.99 | per 7 days |
| Homework Helper Plus | $4.99 | per 7 days |
| Homework Helper Plus | $8.99 | per 7 days |
| Homework Helper Plus | $29.99 | per year |
| Homework Helper Plus | $39.99 | per year |
| Homework Helper Plus | $42.99 | per year |


### Protein Sequence Viewer

[App page](https://appshunter.io/ios/app/protein-sequence-viewer/id6758012449)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Nori free?

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

### Is Protein Sequence Viewer free?

Protein Sequence Viewer is free to download, with no in-app purchases.

### Do Nori or Protein Sequence Viewer have ads?

Both Nori and Protein Sequence Viewer show ads.

### Which is updated more often, Nori or Protein Sequence Viewer?

Nori ships an update every 4 days, and Protein Sequence Viewer every 2 days. Most recently, Nori was updated on October 8, 2026 and Protein Sequence Viewer on October 5, 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.*