# SQL Primer vs Ace SQL Interviews

The clearest difference is in-app purchases: SQL Primer at none against Ace SQL Interviews's 2. SQL Primer also leads on iOS requirement (13.4 vs 15.0). Ace SQL Interviews's advantage is update cadence (every 2 weeks vs every 27 months). On price, ads and device support there is nothing between them.

Both are free to download. Ace SQL Interviews sells 2 one-off in-app purchases. SQL Primer asks for nothing beyond the download.

SQL Primer ships an update every 27 months, Ace SQL Interviews every 2 weeks. The most recent releases landed on September 15, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | SQL Primer | Ace SQL Interviews |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.2 (20 ratings)](https://appshunter.io/ios/app/sql-primer/id374204155/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 79.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 32 MB | 22 MB |
| Requires iOS | **13.4** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dr. Ralph Heider](https://appshunter.io/developer/374204158) | [Sandyarani Lagishetti](https://appshunter.io/developer/1723755550) |

## What reviewers say

### SQL Primer

[App page](https://appshunter.io/ios/app/sql-primer/id374204155)

Learn about relational algebra and SQL query language through sample queries, results, and descriptions. This app is suitable for beginners exploring databases or experienced users transitioning to SQL92.

**Highlights:** SQL92 and SQL86/89 sample queries, Query results display, Query descriptions, SQL test script display, Introduction to database concepts

**Features:** macOS Compatibility

**In-app purchases:** none


### Ace SQL Interviews

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

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Unlimited SQL Ace | $14.99 | one-time |
| Unlock All Questions & Answers | $19.99 | one-time |


## Frequently asked questions

### Is SQL Primer free?

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

### Is Ace SQL Interviews free?

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

### Do SQL Primer or Ace SQL Interviews have ads?

Neither SQL Primer nor Ace SQL Interviews shows ads.

### Which is updated more often, SQL Primer or Ace SQL Interviews?

SQL Primer ships an update every 27 months, and Ace SQL Interviews every 2 weeks. Most recently, SQL Primer was updated on September 15, 2026 and Ace SQL Interviews on September 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.*