Comparison

Iowa One Call vs Subsurface Maps Offline

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

Head to head
About

Iowa One Call

This app allows excavators, homeowners, and facility operators in Iowa to manage locate requests. It provides access to a resource center, ticket search, and news updates for efficient excavation planning and management.

Highlights
  • Manage locate requests
  • Access Resource Center
  • Search submitted tickets
  • View positive response history
  • Access ISITE online tools
  • View news and events
Features
Read full description

Excavators, homeowners, and facility operators can use the Iowa One Call app to easily and quickly manage locate requests.  Anyone planning to excavate in Iowa can use the app to initiate, manage and monitor a locate request prior to excavation.  Facility operators can use the ticket management feature to provide a positive response to excavators. Use the app to: Access a Resource Center with links to the Iowa One Call handbook, excavator guide, color codes and instructional videos. View and share these items with the click of a button. Find and view previously submitted tickets with Ticket Search. View the positive response history and an on-line worksite map through Ticket Search. Log in to ISITE for access to all of Iowa One Call’s online tools such as IMAP, Locator Ticket Management, and ITIC. Get the latest News and Events announcements from Iowa One Call. Why wait?  Download now and keep all things Iowa One Call in the palm of your hand!

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.

Screenshots

Iowa One Call4 screens
Subsurface Maps Offline3 screens

Verdict

The call

The clearest difference is rating: Subsurface Maps Offline at 5.0 against Iowa One Call's 2.8. Subsurface Maps Offline also leads on update cadence (every 4 weeks vs every 3 months). Iowa One Call's advantage is ratings volume (9 vs 2). On price, ads, in-app purchases and monetization model 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

Subsurface Maps Offline holds the better App Store score, 5.0 against 2.8. Both are backed by a comparable volume of ratings — 9 and 2 respectively.

UpkeepUpdate frequency

Iowa One Call ships an update every 3 months, Subsurface Maps Offline every 4 weeks. The most recent releases landed on October 24, 2026 and October 3, 2026 respectively.

Scorecard3 real differences · 7 level
Iowa One Call versus Subsurface Maps Offline: the parameters behind the verdict, then further details
ParameterIowa One CallSubsurface Maps Offline
PriceFreeFree
Rating2.8 (9 ratings)5.0 (2 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings9 — better2
Update frequencyEvery 3 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size37 MB81 MB
Age rating4+4+
DeveloperOne Call Concepts, Inc.Ben Hill

Customer experience

Iowa One Call

All ratings9 ratings
Positive44.4%
Neutral0.0%
Negative55.6%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Subsurface Maps Offline

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

In-app purchases

None

Iowa One Call

No in-app purchases

None

Subsurface Maps Offline

No in-app purchases

Questions

Is Iowa One Call free?
Iowa One Call is free to download, with no in-app purchases.
Is Subsurface Maps Offline free?
Subsurface Maps Offline is free to download, with no in-app purchases.
Which has better reviews, Iowa One Call or Subsurface Maps Offline?
Subsurface Maps Offline is rated higher. Iowa One Call averages 2.8 out of 5 from 9 ratings, while Subsurface Maps Offline averages 5.0 from 2 ratings.
Do Iowa One Call or Subsurface Maps Offline have ads?
Neither Iowa One Call nor Subsurface Maps Offline shows ads.
Which is updated more often, Iowa One Call or Subsurface Maps Offline?
Iowa One Call ships an update every 3 months, and Subsurface Maps Offline every 4 weeks. Most recently, Iowa One Call was updated on October 24, 2026 and Subsurface Maps Offline on October 3, 2026.

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