# Most Common Words vs knockOut Study

The clearest difference is update cadence: knockOut Study at every 5 days against Most Common Words's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Most Common Words sells 5 in-app purchases, starting at $12.99 per month and knockOut Study sells 3 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

Most Common Words ships an update every 6 weeks, knockOut Study every 5 days. The most recent releases landed on October 2, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Most Common Words | knockOut Study |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/most-common-words/id6467641849/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 104 MB | 306 MB |
| Requires iOS | 16.6 | **15.5** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dominik Gyecsek](https://appshunter.io/developer/1447946653) | [MAKSYM KHAMAD](https://appshunter.io/developer/1823494759) |

## What reviewers say

### Most Common Words

[App page](https://appshunter.io/ios/app/most-common-words/id6467641849)

Master 31 languages with 3,000 essential words and over 100,000 example sentences. Features hands-free learning, spaced repetition, quizzes, and offline access. Sync progress across devices and personalize your studies with custom word lists.

**Highlights:** 3,000 essential vocabulary words, 100,000+ example sentences, Hands-free learning, Spaced repetition system, Interactive quizzes, Offline access, Progress sync across devices

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $12.99 | per month |
| Yearly Pro | $59.99 | per year |
| Yearly Pro | $79.99 | per year |
| Lifetime Pro | $79.99 | one-time |
| Lifetime Pro | $119.99 | one-time |


### knockOut Study

[App page](https://appshunter.io/ios/app/knockout-study/id6747940497)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| knockOut Pro Monthly | $8.99 | per month |
| knockOut Pro Monthly | $73.90 | per year |
| knockOut Pro Life | $99.99 | one-time |


## Frequently asked questions

### Is Most Common Words free?

Most Common Words is free to download, with in-app purchases available.

### Is knockOut Study free?

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

### Do Most Common Words or knockOut Study have ads?

Neither Most Common Words nor knockOut Study shows ads.

### Which is updated more often, Most Common Words or knockOut Study?

Most Common Words ships an update every 6 weeks, and knockOut Study every 5 days. Most recently, Most Common Words was updated on October 2, 2026 and knockOut Study 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.*