# Subsurface Maps Offline vs Next City Mobile

The clearest difference is update cadence: Next City Mobile at every 6 days against Subsurface Maps Offline's every 4 weeks. Subsurface Maps Offline's advantage is iOS requirement (15.0 vs 17.0). On price, rating, ratings volume and ads there is nothing between them.

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 Next City Mobile. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

Subsurface Maps Offline ships an update every 4 weeks, Next City Mobile every 6 days. The most recent releases landed on October 3, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Subsurface Maps Offline | Next City Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/subsurface-maps-offline/id6654924764/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/next-city-mobile/id6776026394/reviews) |
| Number of ratings | 2 | 2 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 6 days** |
| Monetization | Free | Free |
| Size | 81 MB | 12 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ben Hill](https://appshunter.io/developer/1645876200) | [Next Century Submetering Systems](https://appshunter.io/developer/994253846) |

## 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


### Next City Mobile

[App page](https://appshunter.io/ios/app/next-city-mobile/id6776026394)

Connect to equipment via Bluetooth, access advanced debugging tools for troubleshooting installations, and register devices within a smart city platform. This app facilitates seamless equipment management and data integration.

**Highlights:** BLE connectivity, Advanced debugging tools, Equipment registration, Smart city platform integration, Troubleshooting installations

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

**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 Next City Mobile free?

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

### Which has better reviews, Subsurface Maps Offline or Next City Mobile?

Subsurface Maps Offline and Next City Mobile are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do Subsurface Maps Offline or Next City Mobile have ads?

Neither Subsurface Maps Offline nor Next City Mobile shows ads.

### Which is updated more often, Subsurface Maps Offline or Next City Mobile?

Subsurface Maps Offline ships an update every 4 weeks, and Next City Mobile every 6 days. Most recently, Subsurface Maps Offline was updated on October 3, 2026 and Next City Mobile on October 24, 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.*