# How Deep Is It? vs Keyword Master SEO Tool

The clearest difference is ads: How Deep Is It? at none against Keyword Master SEO Tool's shown. How Deep Is It? also leads on iOS requirement (7.0 vs 13.0). Keyword Master SEO Tool's advantage is update cadence (monthly vs every 18 months). 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.

How Deep Is It? ships an update every 18 months, Keyword Master SEO Tool monthly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | How Deep Is It? | Keyword Master SEO Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (13 ratings)](https://appshunter.io/ios/app/how-deep-is-it/id955364125/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 18 months | **Monthly** |
| Monetization | Free | — |
| Size | 15 MB | 78 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tom Soderling](https://appshunter.io/developer/955364124) | [CHANG DEOK KIM](https://appshunter.io/developer/1691984952) |

## What reviewers say

### How Deep Is It?

[App page](https://appshunter.io/ios/app/how-deep-is-it/id955364125)

Explore physics concepts hands-on with this app. It uses your device's accelerometer to demonstrate falling body equations, allowing you to visualize and hear the distance traveled. Experience classic physics principles in an interactive way.

**Highlights:** Illustrates falling body equations, Uses device accelerometer, Large text distance display, Audio feedback for distance, Ad-free experience

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is How Deep Is It? free?

How Deep Is It? is free to download, with no in-app purchases.

### Is Keyword Master SEO Tool free?

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

### Do How Deep Is It? or Keyword Master SEO Tool have ads?

Keyword Master SEO Tool shows ads; How Deep Is It? does not.

### Which is updated more often, How Deep Is It? or Keyword Master SEO Tool?

How Deep Is It? ships an update every 18 months, and Keyword Master SEO Tool monthly. Most recently, How Deep Is It? was updated on October 24, 2026 and Keyword Master SEO Tool on October 25, 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.*