KorTerra Field vs Subsurface Maps Offline
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KorTerra Field
Manage 811 locate tickets efficiently on the go. Plan your day, upload photos, and communicate directly with ticket owners. Features offline capabilities for continued work without a connection.
- Manage 811 tickets
- Upload photos to tickets
- Click-to-call/email
- Offline ticket management
- Map-centric views
- Timesheet management
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Welcome to the next generation of KorTerra one call ticket management for mobile users, available for download on any smartphone or tablet. KorTerra Field has been purposefully designed for locators with the goal of empowering greater efficiency when managing 811 locate tickets on the go. Locators can easily plan their day around the type and location of tickets, take and upload photos directly in the app without sacrificing device storage space, and utilize click-to-call or click-to-email capabilities that provide streamlined communication with ticket owners and contractors. Offline capabilities allow users with spotty or no connection to continue viewing, managing, and completing tickets. Some of many additional features and capabilities of Field include: - View, track, update, and complete assigned tickets - Cross-launch default maps for easy navigation - Take and attach photos directly to the ticket - Map-centric views - Visual cues for emergency, late, and coming due tickets - Add notes to tickets - Custom filters and sorting options for tickets - View underground facilities layer (if licensed) - Set preferences for and receive in-app notifications for changes to assigned tickets - Track location against the dig box - Enter and manage timesheets Privacy Policy: https://www.korterra.com/privacy-policy
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.
- Download maps for offline use
- View and edit map features
- Mark new points
- Sync changes to the cloud
- Turn map layers on/off
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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.
Screenshots
Verdict
The clearest difference is rating: Subsurface Maps Offline at 5.0 against KorTerra Field's 4.5. KorTerra Field's advantage is ratings volume (20 vs 2). On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Subsurface Maps Offline holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: KorTerra Field has 20 ratings behind it against 2, so its average is the more settled of the two.
KorTerra Field ships an update every 3 weeks, Subsurface Maps Offline every 4 weeks. The most recent releases landed on October 27, 2026 and October 3, 2026 respectively.
| Parameter | KorTerra Field | Subsurface Maps Offline |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (20 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 8.6% of reviews | — |
| Number of ratings | 20 — better | 2 |
| Update frequency | Every 3 weeks — better | Every 4 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.5 — better | 15.0 |
| Further details — not scored | ||
| Size | 109 MB | 81 MB |
| Age rating | 4+ | 4+ |
| Developer | KorTerra, Inc. | Ben Hill |
Customer experience
KorTerra Field
Subsurface Maps Offline
Bugs and requests
KorTerra Field
Reported bugs
65 issues- Application starting is all it will do
- App demands location settings to be ‘Always On’
- App crashes daily
- App crashes when scrolling map too quickly or zooming too fast
- New update crashes more
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- Constant app crashing or not syncing
- Map not loading basic things
- Constantly crashing using the zoom, or just by itself
- Syncing issues
- Cannot lock the screen or it will stop and eventually fail
- Issues uploading pictures
- Takes forever to sync
- Cannot exit the app and let it run in the background because it won’t sync
- Uploading 50 pictures at a time is a joke and causes constant crashes
- When using the in app camera, it crashes and deletes the pictures
- Mapping ordains to load, it flashes and changes the routes of the mains in between each flash
- App reopens closed tickets without notice
- It’s like pulling teeth to get the board to resync
- Charged me $10 to download even though it’s a free app
- Wont upload pictures for hours even with wifi and great service
- Will kick you out randomly while using
- Will make you uninstall and redownload once or twice a week for it to work properly
- Maps don’t load
- Camera causes app to crash
- Web based program is not simplified for the everyday locator to use
- Load times are insane
- In app camera is broken and doesn’t work
- Logs you out randomly CONSTANTLY then takes 20 minutes to load you back in
- Sync issues
- Password issues
- Always restarting
- Locked out now and can’t reset my password
- Junk app keeps crashing
- Overlay issues with the mapping system
- Overlays flash and some usually persist after selecting other pins
- Trying to change between maps and satellite imagery can be hit or miss
- App will shut down and log the user out about 6 to 10 times during the completion of one single ticket
- Constantly force feeds you prompts you don’t need
- App crashes almost consistently 30-40 times a day
- Fails at the most basic tasks
- Constant app crashing
- Unable to sync photos to your ticket
- Overlay issues with the mapping system
- Button disappears and reappears somewhat at random
- Constant crashing
- Takes 10 years to upload photos
- App had a update and now if you even upload 8 photos it kicks you out of the app every time you attempt to close the ticket
- Cant stay on app longer than 5 minutes without crashing
- App constantly logs you out ever 10-15 minutes
- Constantly fails to upload and any photos
- App crashes 3 times an hour then won’t even open up
- Upgrades have been made but that doesn’t change anything on how Bad the uploading pictures is or having your tickets load on time
- It used to be fairly reliable with regards to syncing tickets on the app with tickets on the website. Now it’s horrible.
- App restarts constantly
- Usually happens when I’m trying to upload pictures from a locate. Which means it’s a total crapshoot if it attaches the pictures, or not.
- App keeps logging you out every 4 hours
- Pictures take a long time to upload
- System is always freezing and takes forever to sync
- App crashed 5 times back to back when all I was doing was trying to open 1 of 7 tickets
- Tickets never update
- Even when you manually force to update tickets, they do not.
- Accessing tickets is a pain
- Uploading photos is an exercise in futility
- Good luck getting the gps and maps to work
- Last app would crash every 5 mins; it’s safe to assume you’ll be missing that because this is somehow worse
Requested features
5 requests- Ability to include all photos in a ticket at one time
- Queuing system for photo uploads
- Location and zoom memory for mapping
- Include all photos in a ticket at one time
- Ability to include all photos in a ticket at one time
Subsurface Maps Offline
Not enough reviews yet to summarise bugs or requests.
In-app purchases
KorTerra Field
No in-app purchases
Subsurface Maps Offline
No in-app purchases
Questions
Is KorTerra Field free?
Is Subsurface Maps Offline free?
Which has better reviews, KorTerra Field or Subsurface Maps Offline?
Do KorTerra Field or Subsurface Maps Offline have ads?
Which is updated more often, KorTerra Field or Subsurface Maps Offline?
Other comparisons
