# Vowels Central Diphthong vs WordSuccess

The clearest difference is price: WordSuccess at Free against Vowels Central Diphthong's $4.99. WordSuccess also leads on update cadence (every 9 months vs every 37 months). Vowels Central Diphthong's advantage is iOS requirement (11.0 vs 14.0). On ads, in-app purchases and device support there is nothing between them.

WordSuccess is free to download; Vowels Central Diphthong costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Vowels Central Diphthong ships an update every 37 months, WordSuccess every 9 months. The most recent releases landed on October 23, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Vowels Central Diphthong | WordSuccess |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[3.0 (24 ratings)](https://appshunter.io/ios/app/wordsuccess/id1497217347/reviews)** |
| Number of ratings | — | **24** |
| Positive reviews | — | 28.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 9 months** |
| Monetization | — | Ad-supported |
| Size | 31 MB | 118 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Blue Tree Publishing, Inc.](https://appshunter.io/developer/496143325) | [Advanced Bionics, LLC](https://appshunter.io/developer/533826496) |

## What reviewers say

### Vowels Central Diphthong

[App page](https://appshunter.io/ios/app/vowels-central-diphthong/id731753490)

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

**In-app purchases:** none


### WordSuccess

[App page](https://appshunter.io/ios/app/wordsuccess/id1497217347)

This free program helps adults with hearing aids or cochlear implants improve their ability to distinguish between words, both in quiet and noisy environments. It offers a 45-level hierarchy of exercises, over 2,300 spoken words, and the option to practice alone or with a listening coach.

**Highlights:** Word difference practice, Quiet and noise environments, 45-level hierarchy, Over 2,300 spoken words, Practice alone or with a coach, Placement test

**In-app purchases:** none


## Frequently asked questions

### Is Vowels Central Diphthong free?

Vowels Central Diphthong costs $4.99, with no in-app purchases.

### Is WordSuccess free?

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

### Do Vowels Central Diphthong or WordSuccess have ads?

Neither Vowels Central Diphthong nor WordSuccess shows ads.

### Which is updated more often, Vowels Central Diphthong or WordSuccess?

Vowels Central Diphthong ships an update every 37 months, and WordSuccess every 9 months. Most recently, Vowels Central Diphthong was updated on October 23, 2026 and WordSuccess on November 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.*