# Vocabulary Builder by Knudge — Learn Words, Flashcards, Games

> English learning app for vocabulary, grammar, idioms, and phrasal verbs. (iPhone/iPad app by Knudge Technology Private Limited.)

- Source: https://appshunter.io/ios/app/vocabulary-builder-by-knudge/id1358258808 (this page in markdown: same URL + `.md`)
- Developer: [Knudge Technology Private Limited](https://appshunter.io/developer/1358258807)
- Category: Education, Productivity
- Price: Free with in-app purchases
- Rating: 4.70/5 from 1,740 App Store ratings · 132 written reviews indexed
- Age rating: 9+
- Requires: iOS 13.0 · 93 MB
- Languages: American English
- Released: 2018-04-07
- Data updated: 2026-08-30
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/vocabulary-builder-by-knudge/id1358258808/reviews.md

## What is Vocabulary Builder by Knudge?

Build a bigger, sharper vocabulary in just 5 minutes a day.

Knudge helps you learn new words, remember them for good, and actually use them - with smart flashcards, word games, and spaced repetition trusted by millions of learners since 2016.

Most people forget new words within days. Knudge is built around the science of memory: spaced repetition and adaptive review resurface each word right before you'd forget it, so your vocabulary sticks for the long term - not just until the test.

WHO IT'S FOR
- Students prepping for the GRE, SAT, GMAT, TOEFL or IELTS
- Professionals who want to write and speak with more precision
- Anyone who loves words and wants to sound more articulate and confident

HOW IT WORKS
- Learn hand-picked words with clear definitions, example sentences, synonyms, antonyms and visual cues
- Lock them in with adaptive flashcards and personalized revision tests
- Play quick word games that make practice feel like a break, not a chore
- Get words delivered through notifications at a frequency that suits you every day. This spaced repetition technique helps in building long-term memory. 

WHAT'S INSIDE
- Curated word lists from everyday English to advanced, exam-level vocabulary
- Courses on idioms, phrasal verbs and commonly confused words
- 10+ word games spanning reading, spelling, comprehension and grammar
- Audio pronunciations and a progress tracker to keep your streak alive

WHY KNUDGE
- Nearly 10 years refining how people learn words — millions of learners and counting
- Bite-sized 5-minute sessions designed to fit a real day
- Learn on the go, online or offline

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Start free and build a vocabulary you'll actually use.

## Key features

- Vocabulary builder courses (Easy, Intermediate, Advanced)
- Learn English idioms
- Master phrasal verbs
- Understand commonly confused words
- Interactive vocabulary games
- Improve reading, writing, and speaking skills
- Grammar refinement games

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Quarterly Subscription | $19.99 | per 3 months |
| Knudge-English Vocabulary(Monthly) | $9.99 | per month |
| Knudge- English Vocabulary(Yearly) | $34.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Membership | $1.99 | one-time |
| Knudge.me Pro | $4.99 | one-time |
| Ratio and Proportion | $0.99 | one-time |
| Proverbs | $0.99 | one-time |
| Pronouns | $0.99 | one-time |
| Knudge Pro Lifetime Membership | $19.99 | one-time |
| Knudge Pro Lifetime Membership | $8.99 | one-time |


## What do users think of Vocabulary Builder by Knudge?

Overall sentiment: positive

**Pros**

- 🚀 Easy to use
- 👍 Fun and engaging games
- 💡 Helpful for improving vocabulary and grammar
- 🚀 Efficient learning experience
- 👍 Visually appealing design
- 🚀 Comprehensive content

**Cons**

- 🐛 Occasional bugs and crashes
- 💰 Paid subscription required for full access
- 🔒 Login issues
- 🐛 Compatibility problems on some devices

**Commonly reported bugs**

- Prepositions mini course not working properly
- Vocabulary builder not displaying explanation pictures
- Quiz feature not advancing to next screen

**Most requested features**

- More practice problems for math section
- Reset progress option for free users
- Pronunciation feature for words
- Support for more languages

## Recent user reviews (10 of 132)

All indexed reviews: https://appshunter.io/ios/app/vocabulary-builder-by-knudge/id1358258808/reviews.md

### 5/5 — Informative & FUN

*2026-06-07*

I got this app for a long time and i enjoy it time to time

### 5/5 — Innovative logic used to make user remember difficult words

*2026-05-24*

Amazing app

### 5/5 — Best Easy Application

*2025-11-01*

the application has been designed smartly with lot of interesting Topics best for beginners

### 5/5 — Makes learning fun

*2025-10-27*

Knudge makes it easier to learn new vocabulary and the games are super fun too

### 5/5 — English

*2025-10-25, version 3.0.4*

I loved it it improved my language all my teacher are happy

### 5/5 — The best app on world

*2025-08-27, version 3.0.4*

Good and the best experience

### 5/5 — Awesome awesome

*2024-08-17, version 3.0.3*

This has increased my vocabulary . I love it

### 1/5 — Error on mini courses

*2024-04-10, version 3.0.1*

I recently got errors on my iPhone 15 pro. The page can’t move to next page nor the okay button is not working.

### 1/5 — Login Issues

*2024-02-15, version 3.0.1*

I can’t login in the app. It’s appear failed to login. Need solution on a emergency basis.

### 1/5 — Horrível

*2024-01-18, version 3.0.1*

Não vale a pena

## Frequently asked questions about Vocabulary Builder by Knudge

### What does Improve English by Knudge do?

This app helps users learn and improve their English language skills in an easy, interesting, and effective way. It utilizes scientific algorithms and offers various courses and games to enhance vocabulary, grammar, idioms, phrasal verbs, and commonly confused words.

### What are the key features of this English learning app?

Key features include structured vocabulary builder courses for different levels, modules on English idioms, phrasal verbs, and commonly confused words. It also offers a variety of interactive games designed to improve reading, writing, speaking, and spelling skills.

### Is Improve English by Knudge free to use?

The app is free to download and use, offering a range of features and content. However, it does have in-app purchases, suggesting that some advanced features or additional content may be available for purchase.

### Who is the target audience for this app?

The app is designed for anyone looking to improve their English proficiency. This includes students preparing for competitive exams like CAT, GRE, GMAT, IELTS, and TOEFL, as well as individuals who want to enhance their everyday communication skills.

### How does the app help with vocabulary building?

The app offers dedicated vocabulary builder courses with expert-curated wordlists. These courses use flashcards, definitions, example sentences, synonyms/antonyms, and infographics to aid memorization and understanding, making vocabulary acquisition more effective.

## Version history (last 5 releases)

### 3.0.7 — 2026-07-06

**What's New**

* A brand-new referral experience is here!
* Deep linking is now supported for a smoother referral journey.
* Earn **25 credits** for every friend you refer.
* Redeem your credits to unlock **Mini Courses**, **Smart Vocab** words, and more.

Update now and start referring your friends!

### 3.0.6 — 2026-06-27

In this release, we have made minor bug fixes, fixed a few crashes on some iOS versions, enhanced the login experience, and improved the app performance for iPhone 17.

### 3.0.5 — 2026-06-22

In this release, we have made minor bug fixes, enhanced the login experience, and improved the app performance for iPhone 17.

### 3.0.4 — 2024-09-15

Facebook share bug fixes.

### 3.0.3 — 2024-07-21

Fixed Words Race Game Bug!

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## More apps by Knudge Technology Private Limited

- [GRE Verbal Prep Master](https://appshunter.io/ios/app/gre-verbal-prep-master/id1480116700)
- [STEP Vocabulary Builder](https://appshunter.io/ios/app/step-vocabulary-builder/id1503479575)

All apps by Knudge Technology Private Limited: https://appshunter.io/developer/1358258807

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-30.*