Comparison

Subsurface Maps Offline vs Next City Mobile

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Subsurface Maps Offline

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
Read full description

Subsurface Maps Offline is an app that allows existing Subsurface Maps users to download their maps from the cloud to their iOS device for use offline. Using this app you can view your map, turn layers on and off, make changes to any feature, and mark new points. Then when you are back at the office you can use the "Sync" button to upload your changes to the Subsurface Maps cloud where they will be accessible to the rest of your team. The regular browser-based Subsurface Maps application is still the flagship product where you must go to create layers, change colors, modify your field layout, draw lines, etc. The offline app is a less functional version that allows you to do basic data collection and viewing offline. How it works 1. These instructions assume you already have a Subsurface Maps account. 2. Install this app on your tablet or phone. 3. Run the app and enter your Subsurface Maps user name and password. 4. Select which map(s) you want to download to your phone/tablet. 5. Open your map, view it, make changes, add new points, etc. 6. When you are ready to upload your changes click Menu, then click Offline Maps, then click the 'Sync' button next to your map name. This will upload your edits and download any changes that others have made.

About

Next City Mobile

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
Read full description

Welcome to the Next City mobile app! Use this app to connect to NextConnects over BLE, turn on advanced debugging tools to troubleshoot equipment installations, and register NextConnects to specific addresses in the Next City platform.

Screenshots

Subsurface Maps Offline3 screens
Next City Mobile4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 7 level
Subsurface Maps Offline versus Next City Mobile: the parameters behind the verdict, then further details
ParameterSubsurface Maps OfflineNext City Mobile
PriceFreeFree
Rating5.0 (2 ratings)5.0 (2 ratings)
Number of ratings22
Update frequencyEvery 4 weeksEvery 6 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size81 MB12 MB
Age rating4+4+
DeveloperBen HillNext Century Submetering Systems

Customer experience

Subsurface Maps Offline

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Next City Mobile

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Subsurface Maps Offline

No in-app purchases

None

Next City Mobile

No in-app purchases

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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