# CertAI vs Java Data Structures Pro

The clearest difference is price: CertAI at Free against Java Data Structures Pro's $4.99. Java Data Structures Pro's advantage is in-app purchases (none vs 5). On ads, device support and iOS requirement there is nothing between them.

CertAI is free to download; Java Data Structures Pro costs $4.99 up front. CertAI sells 5 in-app purchases, starting at $4.99 per 7 days. Java Data Structures Pro asks for nothing beyond the download.

## The numbers

| Metric | CertAI | Java Data Structures Pro |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/certai-ccna-exam-prep-2025/id6746353256/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 41 MB | 18 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Can Garip](https://appshunter.io/developer/1805764621) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### CertAI

[App page](https://appshunter.io/ios/app/certai-ccna-exam-prep-2025/id6746353256)

Prepare for your CCNA certification with realistic lab simulations, adaptive study plans, and over 400 practice questions. Track your progress with smart analytics and access flashcards for quick review. Study offline with priority support.

**Highlights:** Real-world lab simulations, AI-driven adaptive study plan, 400+ timed practice questions, 200+ flashcards with explanations, Smart progress analytics, Offline mode and priority support

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CCNA Premium Subscriptions | $4.99 | per 7 days |
| CCNA Premium Subscriptions | $14.99 | per month |
| CCNA 3 months Premium | $34.99 | per 3 months |
| CCNA 6 MONTHS PREMIUM | $49.99 | per 6 months |
| CCNA Yearly New User | $59.99 | per year |


### Java Data Structures Pro

[App page](https://appshunter.io/ios/app/java-data-structures-pro/id6756707292)

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

**In-app purchases:** none


## Frequently asked questions

### Is CertAI free?

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

### Is Java Data Structures Pro free?

Java Data Structures Pro costs $4.99, with no in-app purchases.

### Do CertAI or Java Data Structures Pro have ads?

Neither CertAI nor Java Data Structures Pro shows ads.

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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.*