# Do Homework vs Instrument Classification

The clearest difference is in-app purchases: Instrument Classification at none against Do Homework's 1. Do Homework's advantage is ads (none vs shown) and iOS requirement (11.0 vs 15.8.3). On price, update cadence and device support there is nothing between them.

Both are free to download. Do Homework sells 1 one-off in-app purchase. Instrument Classification asks for nothing beyond the download.

Do Homework ships an update fortnightly, Instrument Classification every 2 weeks. The most recent releases landed on October 5, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Do Homework | Instrument Classification |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/do-homework/id1525376795/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 96 MB | 43 MB |
| Requires iOS | **11.0** | 15.8.3 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Heavenbrook Software Inc.](https://appshunter.io/developer/451446278) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### Do Homework

[App page](https://appshunter.io/ios/app/do-homework/id1525376795)

Edit PDFs and images directly, saving changes to new files without altering originals. Merge documents, work with cloud storage, and use a scratchpad for notes. Share files and chat with friends.

**Highlights:** Edit PDFs and images directly, Save edits to new files, Merge PDFs and images, Work with Google Drive, Cloud file sharing, Scratchpad for notes, Draw lines and circles

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Do homework upgrade | $1.99 | one-time |


### Instrument Classification

[App page](https://appshunter.io/ios/app/instrument-classification/id6749178763)

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

**In-app purchases:** none


## Frequently asked questions

### Is Do Homework free?

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

### Is Instrument Classification free?

Instrument Classification is free to download, with no in-app purchases.

### Do Do Homework or Instrument Classification have ads?

Instrument Classification shows ads; Do Homework does not.

### Which is updated more often, Do Homework or Instrument Classification?

Do Homework ships an update fortnightly, and Instrument Classification every 2 weeks. Most recently, Do Homework was updated on October 5, 2026 and Instrument Classification on September 24, 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.*