How Deep Is It? vs Keyword Master SEO Tool
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
How Deep Is It?
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.
- Illustrates falling body equations
- Uses device accelerometer
- Large text distance display
- Audio feedback for distance
- Ad-free experience
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Physics AND fun! This app helps illustrate one of the most common falling body equations with your very own accelerometer-enabled device. Experience for yourself, in a hands-on way, how far your device has traveled using the classic physics equation: d = ½gt² Features: • See the distance with large text display • Hear the distance with audio feedback • Still ad-free as always!
Keyword Master SEO Tool
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Boost your SEO strategy with Keyword Master! 『 Key Features 』 • Keyword Research: Find the best keywords with accurate search volume. • CPC & Competition: Check bid prices and competition intensity. • Trends: Track keyword popularity over time. • Save & Manage: Keep your favorite keywords organized. • Global Data: Explore keywords across countries and languages. Whether you’re a digital marketer, blogger, YouTuber, or app developer, Keyword Master helps you pick the right keywords to grow your traffic and succeed online. Download now and discover your next winning keyword!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | How Deep Is It? | Keyword Master SEO Tool |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (13 ratings) — better | — |
| Positive reviews | 57.1% of reviews | — |
| Number of ratings | 13 — better | — |
| Update frequency | Every 18 months | Monthly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 7.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 15 MB | 78 MB |
| Age rating | 4+ | 4+ |
| Developer | Tom Soderling | CHANG DEOK KIM |
In-app purchases
How Deep Is It?
No in-app purchases
Keyword Master SEO Tool
No in-app purchases
Questions
Is How Deep Is It? free?
Is Keyword Master SEO Tool free?
Do How Deep Is It? or Keyword Master SEO Tool have ads?
Which is updated more often, How Deep Is It? or Keyword Master SEO Tool?
Other comparisons
