# World Flags Trainer vs Learn SQL

The clearest difference is iOS requirement: World Flags Trainer at 13.0 against Learn SQL's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. World Flags Trainer sells 1 one-off in-app purchase and Learn SQL sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

World Flags Trainer ships an update every 11 days, Learn SQL every 3 weeks. The most recent releases landed on October 7, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | World Flags Trainer | Learn SQL |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (147 ratings)](https://appshunter.io/ios/app/world-flags-trainer/id1583038202/reviews)** | — |
| Number of ratings | **147** | — |
| Positive reviews | 46.2% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 37 MB | 28 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Philipp Straub](https://appshunter.io/developer/1573167056) | [LUKE ANDREW COLEMAN](https://appshunter.io/developer/6804661212) |

## What reviewers say

### World Flags Trainer

[App page](https://appshunter.io/ios/app/world-flags-trainer/id1583038202)

Learn world flags effectively with an adaptive spaced-repetition system. Practice through multiple choice or self-assessment, focusing on active recall for long-term retention. Master flags by continent with dual direction learning and track progress with structured knowledge tests.

**Highlights:** Adaptive spaced-repetition learning, Multiple choice and self-assessment modes, Flag to Country and Country to Flag practice, Categorization by continent, Structured knowledge tests with medals, Adjustable categories and question types, Browse and search flashcards

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $4.99 | one-time |


### Learn SQL

[App page](https://appshunter.io/ios/app/learn-sql-sql-lab/id6804661210)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SQL Lab Pro | $1.99 | one-time |


## Frequently asked questions

### Is World Flags Trainer free?

World Flags Trainer is free to download, with in-app purchases available.

### Is Learn SQL free?

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

### Do World Flags Trainer or Learn SQL have ads?

Neither World Flags Trainer nor Learn SQL shows ads.

### Which is updated more often, World Flags Trainer or Learn SQL?

World Flags Trainer ships an update every 11 days, and Learn SQL every 3 weeks. Most recently, World Flags Trainer was updated on October 7, 2026 and Learn SQL on September 30, 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.*