# FaultKin Mobile vs Field3Dnotes

The clearest difference is iOS requirement: FaultKin Mobile at 11.0 against Field3Dnotes's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

FaultKin Mobile ships an update every 2 months, Field3Dnotes every 6 weeks. The most recent releases landed on October 22, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | FaultKin Mobile | Field3Dnotes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/faultkin-mobile/id1234264776/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 28 MB | 8 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Richard Allmendinger](https://appshunter.io/developer/1194772609) | [Stefano Tavani](https://appshunter.io/developer/6805190215) |

## What reviewers say

### FaultKin Mobile

[App page](https://appshunter.io/ios/app/faultkin-mobile/id1234264776)

This app allows geologists to collect, visualize, and analyze fault slip data directly from their mobile device. It offers both automatic data entry using device orientation and manual input options, with features for grouping data and performing basic calculations.

**Highlights:** Automatic data entry via device orientation, Manual data entry via stereonet or text fields, Group faults with custom tags, Perform basic calculations (rotations, unfolding), Plot P and T axes, moment tensor axes, View plots from any orientation, Stamp entries with time, date, and location

**Features:** macOS Compatibility

**In-app purchases:** none


### Field3Dnotes

[App page](https://appshunter.io/ios/app/field3dnotes/id6805191660)

**In-app purchases:** none


## Frequently asked questions

### Is FaultKin Mobile free?

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

### Is Field3Dnotes free?

Field3Dnotes is free to download, with no in-app purchases.

### Do FaultKin Mobile or Field3Dnotes have ads?

Neither FaultKin Mobile nor Field3Dnotes shows ads.

### Which is updated more often, FaultKin Mobile or Field3Dnotes?

FaultKin Mobile ships an update every 2 months, and Field3Dnotes every 6 weeks. Most recently, FaultKin Mobile was updated on October 22, 2026 and Field3Dnotes on October 31, 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.*