# KnowLang vs Roobie

The clearest difference is rating: KnowLang at 5.0 against Roobie's 4.5. KnowLang also leads on review sentiment (100% vs 84%) and device support (3 vs 1). Roobie's advantage is update cadence (every 2 weeks vs monthly). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. KnowLang sells 7 in-app purchases, starting at $2.99 per month and Roobie sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

KnowLang holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 100% of KnowLang's written reviews are positive against 84% of Roobie's.

KnowLang ships an update monthly, Roobie every 2 weeks. Both last shipped on October 30, 2026.

## The numbers

| Metric | KnowLang | Roobie |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/knowlang/id6444553784/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/roobie-learn-english/id6463568930/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | **100.0% of reviews** | 84.2% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Freemium | Freemium |
| Size | 20 MB | 25 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Iaroslav Oleinikov](https://appshunter.io/developer/1651604102) | [Konstantin Shmykov](https://appshunter.io/developer/1693020939) |

## What reviewers say

### KnowLang

[App page](https://appshunter.io/ios/app/knowlang/id6444553784)

Master English grammar, vocabulary, and speaking with interactive lessons, games, and dialogues. Track your progress and learn offline with a personalized AI tutor. Access a library of books and a phrasebook for real-life conversations.

**Highlights:** Grammar lessons from A1 to B2, 18,000+ vocabulary words with training modes, Six word games including Duel and Crossword, Speaking practice with pronunciation evaluation, 7 interactive dialogues with an AI tutor, 24 English books with tap-to-translate, Offline access to all content

**Features:** macOS Compatibility, iPhone Duo support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KnowLang Pro (1 месяц) | $2.99 | per month |
| KnowLang Pro (6 месяцев) | $9.99 | per 6 months |
| KnowLang Pro (1 год) | $17.99 | per year |
| 15 монет | $0.29 | one-time |
| 60 монет | $0.99 | one-time |
| 140 монет | $1.99 | one-time |
| 300 монет | $2.99 | one-time |


### Roobie

[App page](https://appshunter.io/ios/app/roobie-learn-english/id6463568930)

Practice English conversation with an AI companion. Engage in text or voice dialogues on any topic, receive instant translations, and get detailed error analysis with correction exercises to improve fluency.

**Highlights:** AI conversation partner, Text and voice practice, On-demand dictionary and translator, Detailed error analysis, Error correction exercises, Customizable dialogue topics

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Roobie Premium (1 month) | $4.99 | per month |
| Roobie Premium (1 year) | $29.99 | per year |
| Roobie Premium (1 year) | $29.99 | per year |


## Frequently asked questions

### Is KnowLang free?

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

### Is Roobie free?

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

### Which has better reviews, KnowLang or Roobie?

KnowLang is rated higher. KnowLang averages 5.0 out of 5 from 1 ratings, while Roobie averages 4.5 from 2 ratings.

### Do KnowLang or Roobie have ads?

Neither KnowLang nor Roobie shows ads.

### Which is updated more often, KnowLang or Roobie?

KnowLang ships an update monthly, and Roobie every 2 weeks. Most recently, KnowLang was updated on October 30, 2026 and Roobie on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*