# Ace SQL Interviews vs Query Optimization Concepts

The clearest difference is in-app purchases: Query Optimization Concepts at none against Ace SQL Interviews's 1. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Ace SQL Interviews sells 1 one-off in-app purchase. Query Optimization Concepts asks for nothing beyond the download.

## The numbers

| Metric | Ace SQL Interviews | Query Optimization Concepts |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Size | 22 MB | 38 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sandyarani Lagishetti](https://appshunter.io/developer/1723755550) | [AFTW LLC](https://appshunter.io/developer/1886356149) |

## What reviewers say

### Ace SQL Interviews

[App page](https://appshunter.io/ios/app/ace-sql-interviews/id6477198989)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Unlimited SQL Ace | $14.99 | one-time |


### Query Optimization Concepts

[App page](https://appshunter.io/ios/app/query-optimization-concepts/id6773823412)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ace SQL Interviews free?

Ace SQL Interviews is free to download, with in-app purchases available.

### Is Query Optimization Concepts free?

Query Optimization Concepts is free to download, with no in-app purchases.

### Do Ace SQL Interviews or Query Optimization Concepts have ads?

Neither Ace SQL Interviews nor Query Optimization Concepts 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.*