# Humans MH vs duoBooks

The clearest difference is in-app purchases: Humans MH at none against duoBooks's 11. Humans MH also leads on iOS requirement (13.0 vs 15.0). duoBooks's advantage is update cadence (every 2 weeks vs every 33 months). On price, ads and device support there is nothing between them.

Both are free to download. duoBooks sells 11 in-app purchases, starting at $2.99 per month. Humans MH asks for nothing beyond the download.

Humans MH ships an update every 33 months, duoBooks every 2 weeks. The most recent releases landed on October 11, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Humans MH | duoBooks |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (55 ratings)](https://appshunter.io/ios/app/duobooks-language-learning/id1538452253/reviews)** |
| Number of ratings | — | **55** |
| Positive reviews | — | 68.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 33 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 24 MB | 53 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Costatek S.A.](https://appshunter.io/developer/1460710073) | [PlainProg LLC](https://appshunter.io/developer/1538452255) |

## What reviewers say

### Humans MH

[App page](https://appshunter.io/ios/app/humans-mh/id1497040403)

**Features:** macOS Compatibility

**In-app purchases:** none


### duoBooks

[App page](https://appshunter.io/ios/app/duobooks-language-learning/id1538452253)

Read any book in any language with instant translation and detailed word explanations. Build your vocabulary with a personal dictionary and spaced repetition tools. Improve pronunciation with audio voiceovers and master new languages through immersive bilingual reading.

**Highlights:** Instant translation of any book, Personalized vocabulary dictionary, Spaced repetition for memorization, Audio voiceovers for pronunciation, Bilingual parallel text reading, EPUB reader for custom files

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Plan | $2.99 | per month |
| Full Plan | $6.99 | per month |
| Full Plan | $17.99 | per year |
| 6 Month Full Plan | $19.99 | per 6 months |
| Full Yearly Plan | $29.99 | per year |
| War and Peace | $0.99 | one-time |
| Silver Blaze | $0.99 | one-time |
| On The River | $0.99 | one-time |
| Clochette | $0.99 | one-time |
| The Fishing Hole | $0.99 | one-time |
| Alice in Wonderland | $0.99 | one-time |


## Frequently asked questions

### Is Humans MH free?

Humans MH is free to download, with no in-app purchases.

### Is duoBooks free?

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

### Do Humans MH or duoBooks have ads?

Neither Humans MH nor duoBooks shows ads.

### Which is updated more often, Humans MH or duoBooks?

Humans MH ships an update every 33 months, and duoBooks every 2 weeks. Most recently, Humans MH was updated on October 11, 2026 and duoBooks on October 13, 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.*