# S1 Mobile Map Viewer — Maps for public lands

> Offline maps for U.S. public lands, including BLM and Forest Service areas. (iPhone/iPad app by U.S. Department of the Interior.)

- Source: https://appshunter.io/ios/app/s1-mobile-map-viewer/id1526737140 (this page in markdown: same URL + `.md`)
- Developer: [U.S. Department of the Interior](https://appshunter.io/developer/1498505970)
- Category: Navigation, Travel
- Price: Free
- Rating: 4.00/5 from 7 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.5 · 84 MB
- Languages: English
- Released: 2021-06-24
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/s1-mobile-map-viewer/id1526737140/reviews.md

## What is S1 Mobile Map Viewer?

Download Bureau of Land Management and Forest Service maps for offline use on public lands.

## Key features

- Offline map downloads
- Bureau of Land Management maps
- Forest Service maps
- Public land navigation
- No data connection required

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/s1-mobile-map-viewer/id1526737140/reviews.md

### 1/5 — There needs to be a key

*2024-01-14*

For planning in advance, it really needs a key to highlight and indicate BLM land.  Not very useful otherwise

### 3/5 — Confusing to use

*2022-10-04, version 1.010*

The functionality of this app is frustrating. Maybe it’s better used when you are already in a place, but it’s not very user friendly for researching an area where you hope to go on account of the downloading and reviewing process. Downloads are by name and the full names of the maps are cut off so you don’t know exactly what you’re downloading. The display of what was downloaded is then indicated by sections of the map that become less detailed. You can zoom in for the detailed downloaded maps but by the time you’ve zoomed in to see the detail it’s difficult to determine where on the map you are looking. Compared to other map apps, this one is kind of worthless for pre-trip research

### 5/5 — Awesome offline mapper!

*2021-12-07, version 1.010*

This app is an ideal companion to other free mapping applications. I will be using it for off-road touring/ overlanding. 

S1 shows you exactly where you are on an open source, shaded relief map. Similar to MAPS.ME, the base map has many of the BLM/FS two-tracks that I’ve traveled on in Central/SE Oregon. However, I’m not sure if the base map is available offline. 

However, the big benefit of this app is the access to BLM/FS maps and the landownership status they provide. FOR FREE! Trespassing in the Western US (whether intentional or not) is a BIG NO NO. This app, when combined with other offline map apps, is essential for your backroad excursions. 

Looking forward to the updates and extended map coverage outside of WA/OR.

## Frequently asked questions about S1 Mobile Map Viewer

### What kind of maps does S1 Mobile Map Viewer offer?

S1 Mobile Map Viewer provides offline maps specifically for public lands in the United States, including areas managed by the Bureau of Land Management (BLM) and the U.S. Forest Service. These maps are designed for use when you do not have an internet connection.

### Can I use S1 Mobile Map Viewer without an internet connection?

Yes, the primary function of S1 Mobile Map Viewer is to allow you to download maps for offline use. This means you can navigate public lands even in areas with no cellular service or Wi-Fi.

### Is S1 Mobile Map Viewer free to use?

Yes, S1 Mobile Map Viewer is available for free. There are no costs associated with downloading or using the app and its offline map features.

### What devices is S1 Mobile Map Viewer compatible with?

S1 Mobile Map Viewer is designed for iOS devices, including iPhone, iPad, and iPod. It requires a compatible iOS version to function.

### How often is S1 Mobile Map Viewer updated?

The app was last updated on July 1, 2021, to version 1.010. While the update frequency is not explicitly stated, users can expect updates to address bugs or add new map data as needed.

### What is the age rating for S1 Mobile Map Viewer?

S1 Mobile Map Viewer has an age rating of 4+. This indicates it is suitable for users of all ages and does not contain content inappropriate for children.

### What do users think of S1 Mobile Map Viewer?

Based on 7 ratings, S1 Mobile Map Viewer has an average rating of 4.0 stars. This suggests a generally positive user experience with the app's functionality for accessing public land maps.

### Does S1 Mobile Map Viewer have ads?

The provided data does not specify if S1 Mobile Map Viewer contains advertisements. However, as it is a free application from a government developer, it is likely ad-free or has minimal advertising.

## Version history (last 1 release)

### 1.010 — 2021-07-01

App Name has changed from S1 Mobile Mapper to S1 Mobile Map Viewer

## Apps similar to S1 Mobile Map Viewer

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [US State Parks and Forests Map](https://appshunter.io/ios/app/us-state-parks-and-forests-map/id1550338371) | 3.0 (2) | $2.99 | Navigation |
| [TREAD Map](https://appshunter.io/ios/app/tread-map/id1497706353) | 3.4 (56) | Free | Navigation |
| [OFFROAD ATLAS](https://appshunter.io/ios/app/offroad-atlas/id1114391419) | 1.8 (18) | $0.99 | Navigation |
| [CMC RIMS](https://appshunter.io/ios/app/cmc-rims/id1451683494) | 4.8 (9) | Free | Navigation |
| [BLM Public Lands Map Guide USA](https://appshunter.io/ios/app/blm-public-lands-map-guide-usa/id1546176021) | 3.7 (3) | $2.99 | Navigation |
| [LiveTopo](https://appshunter.io/ios/app/livetopo/id1521874998) | 3.5 (10) | Free | Navigation |

## More apps by U.S. Department of the Interior

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All apps by U.S. Department of the Interior: https://appshunter.io/developer/1498505970

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*