Comparison

Subsurface Maps Offline vs Hello Marshall

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

Hello Marshall

Stay informed about your city with real-time alerts for road closures, weather, and local events. Access essential city resources quickly and easily.

Highlights
  • Real-time alerts
  • Road closure notifications
  • Weather alerts
  • Event updates
  • Access to city resources
Features
Read full description

Wondering how to quickly and easily find out what's going on around City of Marshall? Look no further than Hello Marshall to receive the latest alerts on road closures, weather alerts, events and so much more! In addition to notifications, you'll have easy access to commonly used resources from the City!

Screenshots

Subsurface Maps Offline3 screens
Hello Marshall4 screens

Verdict

The call

The clearest difference is update cadence: Subsurface Maps Offline at every 4 weeks against Hello Marshall's every 13 months. 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 Hello Marshall. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

UpkeepUpdate frequency

Subsurface Maps Offline ships an update every 4 weeks, Hello Marshall every 13 months. The most recent releases landed on October 3, 2026 and October 6, 2026 respectively.

Scorecard1 real difference · 8 level
Subsurface Maps Offline versus Hello Marshall: the parameters behind the verdict, then further details
ParameterSubsurface Maps OfflineHello Marshall
PriceFreeFree
Rating5.0 (2 ratings)5.0 (2 ratings)
Number of ratings22
Update frequencyEvery 4 weeks — betterEvery 13 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size81 MB132 MB
Age rating4+4+
DeveloperBen HillGOGov, Inc.

Customer experience

Subsurface Maps Offline

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

Hello Marshall

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

In-app purchases

None

Subsurface Maps Offline

No in-app purchases

None

Hello Marshall

No in-app purchases

Questions

Is Subsurface Maps Offline free?
Subsurface Maps Offline is free to download, with no in-app purchases.
Is Hello Marshall free?
Hello Marshall is free to download, with no in-app purchases.
Which has better reviews, Subsurface Maps Offline or Hello Marshall?
Subsurface Maps Offline and Hello Marshall are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.
Do Subsurface Maps Offline or Hello Marshall have ads?
Neither Subsurface Maps Offline nor Hello Marshall shows ads.
Which is updated more often, Subsurface Maps Offline or Hello Marshall?
Subsurface Maps Offline ships an update every 4 weeks, and Hello Marshall every 13 months. Most recently, Subsurface Maps Offline was updated on October 3, 2026 and Hello Marshall on October 6, 2026.

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