How Deep Is It? vs Field
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!
Field
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FIELD3D is the solution developed by Dassault Aviation that will allow users to: • navigate through the last updated version of the 3D maintenance documentation set, Basic & Supplemental • take benefit of all the advantages of the digital documentation from Dassault Aviation • get access anywhere, anytime on iOS and Windows
Screenshots
Verdict
The clearest difference is update cadence: Field at every 3 months against How Deep Is It?'s every 18 months. How Deep Is It?'s advantage is iOS requirement (7.0 vs 13.0). On price, ads, 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, Field every 3 months. The most recent releases landed on October 21, 2026 and October 18, 2026 respectively.
| Parameter | How Deep Is It? | Field |
|---|---|---|
| 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 | Every 3 months — better |
| Ads | No | No |
| 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 | 229 MB |
| Age rating | 4+ | 4+ |
| Developer | Tom Soderling | Dassault Aviation |
In-app purchases
How Deep Is It?
No in-app purchases
Field
No in-app purchases
Questions
Is How Deep Is It? free?
Is Field free?
Do How Deep Is It? or Field have ads?
Which is updated more often, How Deep Is It? or Field?
Other comparisons
