# 영 단어즙 vs Certus

The clearest difference is update cadence: Certus at every 3 weeks against 영 단어즙's every 33 months. 영 단어즙's advantage is ratings volume (3 vs 1). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for 영 단어즙 against 5.0 for Certus. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

영 단어즙 ships an update every 33 months, Certus every 3 weeks. The most recent releases landed on September 17, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | 영 단어즙 | Certus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/id1480979760/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/certus/id1670174820/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 33 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 20 MB | 140 MB |
| Requires iOS | 15.6 | **15.5** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [별책](https://appshunter.io/developer/569035377) | [INVERSIONES EDUCA S.A](https://appshunter.io/developer/1481996803) |

## What reviewers say

### 영 단어즙

[App page](https://appshunter.io/ios/app/id1480979760)

This app offers a concentrated approach to learning English vocabulary through daily, bite-sized "juice" extractions. It uses a quiz format to help users memorize words, tracking incorrect answers for targeted review. Various visual styles and an integrated English-English dictionary enhance the learning experience.

**Highlights:** Daily vocabulary "juice" extraction, Quiz-based learning format, Tracking of incorrect words for review, Integrated Oxford English-English dictionary, Native speaker pronunciation audio, iCloud data synchronization, Customizable learning deadlines

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

**In-app purchases:** none


### Certus

[App page](https://appshunter.io/ios/app/certus/id1670174820)

This app provides students with a digital identification card for campus access. It also features a calendar to view classes and a news feed for updates from the institution.

**Highlights:** Digital student ID (Fotocheck), Class calendar and schedule, Campus news feed, Institutional updates

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

**In-app purchases:** none


## Frequently asked questions

### Is 영 단어즙 free?

영 단어즙 is free to download, with no in-app purchases.

### Is Certus free?

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

### Which has better reviews, 영 단어즙 or Certus?

영 단어즙 and Certus are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.

### Do 영 단어즙 or Certus have ads?

Neither 영 단어즙 nor Certus shows ads.

### Which is updated more often, 영 단어즙 or Certus?

영 단어즙 ships an update every 33 months, and Certus every 3 weeks. Most recently, 영 단어즙 was updated on September 17, 2026 and Certus on September 16, 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.*