# Vowels Central Diphthong vs Statistics Solver

The clearest difference is price: Statistics Solver at Free against Vowels Central Diphthong's $4.99. Vowels Central Diphthong's advantage is in-app purchases (none vs 5) and iOS requirement (11.0 vs 14.0.0). On update cadence, ads and device support there is nothing between them.

Statistics Solver is free to download; Vowels Central Diphthong costs $4.99 up front. Statistics Solver sells 5 in-app purchases, starting at $4.99 per 7 days. Vowels Central Diphthong asks for nothing beyond the download.

Vowels Central Diphthong ships an update every 37 months, Statistics Solver every 22 months. The most recent releases landed on October 8, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Vowels Central Diphthong | Statistics Solver |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[4.4 (71 ratings)](https://appshunter.io/ios/app/statistics-solver-stat-ai/id6736710910/reviews)** |
| Number of ratings | — | **71** |
| Positive reviews | — | 77.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 22 months** |
| Monetization | — | Free with in-app purchases |
| Size | 31 MB | 48 MB |
| Requires iOS | **11.0** | 14.0.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Blue Tree Publishing, Inc.](https://appshunter.io/developer/496143325) | [East Frisia LLC](https://appshunter.io/developer/547826578) |

## 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


### Statistics Solver

[App page](https://appshunter.io/ios/app/statistics-solver-stat-ai/id6736710910)

This AI-powered tool provides instant, step-by-step solutions to complex statistical problems. It supports photo recognition for input and offers detailed explanations to enhance understanding for students and professionals alike.

**Highlights:** Instant AI-powered problem solving, Photo recognition for input, Step-by-step solution explanations, Comprehensive statistical topic coverage, Educational tool for students, Time-saver for professionals

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Weekly | $4.99 | per 7 days |
| Premium - Monthly | $12.99 | per month |
| Premium - Yearly Discount | $14.99 | per year |
| Premium - Yearly | $29.99 | per year |
| Premium - Lifetime | $149.99 | one-time |


## Frequently asked questions

### Is Vowels Central Diphthong free?

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

### Is Statistics Solver free?

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

### Do Vowels Central Diphthong or Statistics Solver have ads?

Neither Vowels Central Diphthong nor Statistics Solver shows ads.

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

Vowels Central Diphthong ships an update every 37 months, and Statistics Solver every 22 months. Most recently, Vowels Central Diphthong was updated on October 8, 2026 and Statistics Solver on October 17, 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.*