# Bknil SEO vs SEO_optimize

The clearest difference is ads: Bknil SEO at none against SEO_optimize's shown. Bknil SEO also leads on update cadence (monthly vs every 3 months) and iOS requirement (15.0 vs 26.1). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Bknil SEO sells 4 one-off in-app purchases and SEO_optimize sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Bknil SEO ships an update monthly, SEO_optimize every 3 months. The most recent releases landed on August 7, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | Bknil SEO | SEO_optimize |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 3 months |
| Size | 27 MB | 12 MB |
| Requires iOS | **15.0** | 26.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SANGWOO NOH](https://appshunter.io/developer/1771933747) | [Terje Molle](https://appshunter.io/developer/1841713886) |

## What reviewers say

### Bknil SEO

[App page](https://appshunter.io/ios/app/bknil-seo-backlink-builder/id6751446596)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter | $5.99 | one-time |
| Basic | $11.99 | one-time |
| Pro | $24.99 | one-time |
| Enterprise | $49.99 | one-time |


### SEO_optimize

[App page](https://appshunter.io/ios/app/seo-optimize/id6757407386)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SEO Auditor Supporter | $5.99 | one-time |


## Frequently asked questions

### Is Bknil SEO free?

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

### Is SEO_optimize free?

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

### Do Bknil SEO or SEO_optimize have ads?

SEO_optimize shows ads; Bknil SEO does not.

### Which is updated more often, Bknil SEO or SEO_optimize?

Bknil SEO ships an update monthly, and SEO_optimize every 3 months. Most recently, Bknil SEO was updated on August 7, 2026 and SEO_optimize on September 3, 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.*