# Stereonet Mobile vs DFI

The clearest difference is update cadence: Stereonet Mobile at monthly against DFI's every 8 months. On price, ads, 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.

Stereonet Mobile ships an update monthly, DFI every 8 months. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Stereonet Mobile | DFI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (13 ratings)](https://appshunter.io/ios/app/stereonet-mobile/id1194772610/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 72.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 8 months |
| Monetization | Free | — |
| Size | 29 MB | 62 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Richard Allmendinger](https://appshunter.io/developer/1194772609) | [Deep Foundations Institute, Inc.](https://appshunter.io/developer/1385246120) |

## What reviewers say

### Stereonet Mobile

[App page](https://appshunter.io/ios/app/stereonet-mobile/id1194772610)

This app assists geologists in collecting, visualizing, and analyzing geological orientation data. It offers automatic data entry using device sensors and augmented reality, manual input options, and various plotting and calculation tools for geological features.

**Highlights:** Automatic data entry via device orientation, Augmented reality for strike and dip measurement, Manual data entry via stereonet or text fields, Plotting of lines and planes with user-defined types, Basic geological calculations (rotations, angles, slope stability), Plotting of mean vectors, rose diagrams, and contour lines, View plots from any orientation

**Features:** macOS Compatibility

**In-app purchases:** none


### DFI

[App page](https://appshunter.io/ios/app/dfi-finding-common-ground/id1568544738)

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

**In-app purchases:** none


## Frequently asked questions

### Is Stereonet Mobile free?

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

### Is DFI free?

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

### Do Stereonet Mobile or DFI have ads?

Neither Stereonet Mobile nor DFI shows ads.

### Which is updated more often, Stereonet Mobile or DFI?

Stereonet Mobile ships an update monthly, and DFI every 8 months. Most recently, Stereonet Mobile was updated on October 12, 2026 and DFI on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*