# Iowa One Call vs Subsurface Maps Offline

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.

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 2.8. Both are backed by a comparable volume of ratings — 9 and 2 respectively.

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.

## The numbers

| Metric | Iowa One Call | Subsurface Maps Offline |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (9 ratings)](https://appshunter.io/ios/app/iowa-one-call/id1458568149/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/subsurface-maps-offline/id6654924764/reviews)** |
| Number of ratings | **9** | 2 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Monetization | Free | Free |
| Size | 37 MB | 81 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [One Call Concepts, Inc.](https://appshunter.io/developer/1279836092) | [Ben Hill](https://appshunter.io/developer/1645876200) |

## What reviewers say

### Iowa One Call

[App page](https://appshunter.io/ios/app/iowa-one-call/id1458568149)

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:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*