# Keyword Master SEO Tool vs Prelim360

The clearest difference is ads: Prelim360 at none against Keyword Master SEO Tool's shown. Keyword Master SEO Tool's advantage is update cadence (monthly vs every 2 months) and iOS requirement (13.0 vs 15.6). On price, in-app purchases and device support there is nothing between them.

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

Keyword Master SEO Tool ships an update monthly, Prelim360 every 2 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Keyword Master SEO Tool | Prelim360 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 2 months |
| Size | 78 MB | 43 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CHANG DEOK KIM](https://appshunter.io/developer/1691984952) | [Alcazar, LLC](https://appshunter.io/developer/1475483623) |

## What reviewers say

### Keyword Master SEO Tool

[App page](https://appshunter.io/ios/app/keyword-master-seo-tool/id6745084281)

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

**In-app purchases:** none


### Prelim360

[App page](https://appshunter.io/ios/app/prelim360/id6745491276)

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

**In-app purchases:** none


## Frequently asked questions

### Is Keyword Master SEO Tool free?

Keyword Master SEO Tool is free to download, with no in-app purchases.

### Is Prelim360 free?

Prelim360 is free to download, with no in-app purchases.

### Do Keyword Master SEO Tool or Prelim360 have ads?

Keyword Master SEO Tool shows ads; Prelim360 does not.

### Which is updated more often, Keyword Master SEO Tool or Prelim360?

Keyword Master SEO Tool ships an update monthly, and Prelim360 every 2 months. Most recently, Keyword Master SEO Tool was updated on October 25, 2026 and Prelim360 on October 24, 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.*