# Subsurface Maps Offline vs NX Control

Subsurface Maps Offline and NX Control are too close to call on the numbers: across 8 compared parameters — price, rating, ratings volume and ads among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

On the App Store both sit at effectively the same score — 5.0 for Subsurface Maps Offline against 5.0 for NX Control. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

## The numbers

| Metric | Subsurface Maps Offline | NX Control |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/subsurface-maps-offline/id6654924764/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/nx-control/id6796787363/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | — |
| Monetization | Free | Free |
| Size | 81 MB | 18 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ben Hill](https://appshunter.io/developer/1645876200) | [GSSI Geophysical Survey Systems, Inc.](https://appshunter.io/developer/6796787366) |

## What reviewers say

### Subsurface Maps Offline

[App page](https://appshunter.io/ios/app/subsurface-maps-offline/id6654924764)

Access and edit your maps offline on your iOS device. Download maps from the cloud, make changes, and mark new points. Sync your edits back to the cloud for team access.

**Highlights:** Download maps for offline use, View and edit map features, Mark new points, Sync changes to the cloud, Turn map layers on/off

**In-app purchases:** none


### NX Control

[App page](https://appshunter.io/ios/app/nx-control/id6796787363)

This application transforms your iPhone or iPad into a control and display for GSSI NX-series ground penetrating radar systems. It allows for live data collection, in-field interpretation with target marking and calibration, and project organization with photo attachments.

**Highlights:** Live 2D radar profiles, Quick Scan for single-line collection, Target marking with distance/depth, Depth calibration, Gain tuning, Project organization, Attach photos to scans

**In-app purchases:** none


## Frequently asked questions

### Is Subsurface Maps Offline free?

Subsurface Maps Offline is free to download, with no in-app purchases.

### Is NX Control free?

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

### Which has better reviews, Subsurface Maps Offline or NX Control?

Subsurface Maps Offline and NX Control are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Subsurface Maps Offline or NX Control have ads?

Neither Subsurface Maps Offline nor NX Control shows ads.

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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.*