# 正規表現(Regular Expression) vs Learn SQL

The clearest difference is ads: Learn SQL at none against 正規表現(Regular Expression)'s shown. Learn SQL also leads on update cadence (every 5 days vs every 8 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

正規表現(Regular Expression) ships an update every 8 months, Learn SQL every 5 days. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 正規表現(Regular Expression) | Learn SQL |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/learn-sql-let-us-sql/id6777298710/reviews)** |
| Number of ratings | — | **4** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 8 months | **Every 5 days** |
| Monetization | — | Free |
| Size | 14 MB | 30 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hiroki Sato](https://appshunter.io/developer/1514602166) | [Osamu Nishiyama](https://appshunter.io/developer/1444747231) |

## What reviewers say

### 正規表現(Regular Expression)

[App page](https://appshunter.io/ios/app/regular-expression/id1529795657)

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

**In-app purchases:** none


### Learn SQL

[App page](https://appshunter.io/ios/app/learn-sql-let-us-sql/id6777298710)

Master SQL with bite-sized lessons and hands-on exercises. This app guides you from beginner to job-ready using real-world scenarios and PostgreSQL. Learn by doing, track your progress, and build a consistent learning habit.

**Highlights:** Bite-sized lessons, Hands-on exercises, PostgreSQL focus, Progress tracking, Offline functionality, AI helper

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

**In-app purchases:** none


## Frequently asked questions

### Is 正規表現(Regular Expression) free?

正規表現(Regular Expression) is free to download, with no in-app purchases.

### Is Learn SQL free?

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

### Do 正規表現(Regular Expression) or Learn SQL have ads?

正規表現(Regular Expression) shows ads; Learn SQL does not.

### Which is updated more often, 正規表現(Regular Expression) or Learn SQL?

正規表現(Regular Expression) ships an update every 8 months, and Learn SQL every 5 days. Most recently, 正規表現(Regular Expression) was updated on November 7, 2026 and Learn SQL 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.*