# DDAYO vs SQLmate

The clearest difference is in-app purchases: DDAYO at none against SQLmate's 1. DDAYO also leads on ads (none vs shown) and update cadence (daily vs every 9 days). SQLmate's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 18.0). On price there is nothing between them.

Both are free to download. SQLmate sells 1 in-app purchase, starting at $1.99 per month. DDAYO asks for nothing beyond the download.

DDAYO ships an update daily, SQLmate every 9 days. The most recent releases landed on October 23, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | DDAYO | SQLmate |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Every 9 days |
| Monetization | — | Free with in-app purchases |
| Size | 46 MB | 102 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [JinGyun Jeong](https://appshunter.io/developer/1535411435) | [dasong sim](https://appshunter.io/developer/1883683802) |

## What reviewers say

### DDAYO

[App page](https://appshunter.io/ios/app/ddayo/id6743990712)

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

**In-app purchases:** none


### SQLmate

[App page](https://appshunter.io/ios/app/sqlmate-sqld/id6763740901)

This app helps you prepare for the SQLD certification exam by focusing on effective review and identifying your weaknesses. It uses a science-based algorithm to schedule reviews and provides detailed explanations and practice tests to ensure you retain information.

**Highlights:** FSRS smart review scheduling, Concept learning with 135 lessons, 4,325 practice questions, Detailed explanations, Weakness analysis heatmap, Offline learning support, Mock exams

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 프리미엄 월간 | $1.99 | per month |


## Frequently asked questions

### Is DDAYO free?

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

### Is SQLmate free?

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

### Do DDAYO or SQLmate have ads?

SQLmate shows ads; DDAYO does not.

### Which is updated more often, DDAYO or SQLmate?

DDAYO ships an update daily, and SQLmate every 9 days. Most recently, DDAYO was updated on October 23, 2026 and SQLmate 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.*