# Koreez vs DeltaV Academy

The clearest difference is update cadence: Koreez at every 9 days against DeltaV Academy's every 2 months. DeltaV Academy's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Koreez sells 10 in-app purchases, starting at $3.99 per month and DeltaV Academy sells 3 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

Koreez ships an update every 9 days, DeltaV Academy every 2 months. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Koreez | DeltaV Academy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (40 ratings)](https://appshunter.io/ios/app/koreez/id6465207992/reviews)** | — |
| Number of ratings | **40** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 59 MB | 31 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [KoreezKoreez Educational Program CJS](https://appshunter.io/developer/1706487729) | [Salute to Suit](https://appshunter.io/developer/1803833125) |

## What reviewers say

### Koreez

[App page](https://appshunter.io/ios/app/koreez/id6465207992)

Engage in a knowledge-based competition with friends or solo. This app blends school curriculum with general knowledge for a challenging quiz experience. Climb leaderboards and become a quiz champion.

**Highlights:** Quiz battles with friends, School curriculum integration, General knowledge questions, Leaderboard rankings, Brainpower boosting, Competitive gameplay

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $3.99 | per month |
| Monthly Subscription | $4.95 | per month |
| Monthly Subscription | $6.79 | per month |
| Yearly Subscription | $19.99 | per year |
| Yearly Subscription | $37.49 | per year |
| Yearly Subscription | $40.90 | per year |
| 30 keys | $0.49 | one-time |
| 70 keys | $0.99 | one-time |
| Certificate Download | $1.99 | one-time |
| Event Ticket | $5.99 | one-time |


### DeltaV Academy

[App page](https://appshunter.io/ios/app/deltav-academy-3d-orbit-sim/id6787456171)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $8.99 | per month |
| Pro | $69.00 | per year |
| Delta-V Academy Lifetime | $149.00 | one-time |


## Frequently asked questions

### Is Koreez free?

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

### Is DeltaV Academy free?

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

### Do Koreez or DeltaV Academy have ads?

Neither Koreez nor DeltaV Academy shows ads.

### Which is updated more often, Koreez or DeltaV Academy?

Koreez ships an update every 9 days, and DeltaV Academy every 2 months. Most recently, Koreez was updated on November 3, 2026 and DeltaV Academy on October 31, 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.*