# Topo Maps US vs Detector Maps

The clearest difference is in-app purchases: Topo Maps US at none against Detector Maps's 4. Topo Maps US also leads on ads (none vs shown) and review sentiment (88% vs 73%). Detector Maps's advantage is update cadence (every 6 days vs every 2 months) and rating (4.7 vs 4.4). On price, ratings volume, device support and iOS requirement there is nothing between them.

Both are free to download. Detector Maps sells 4 in-app purchases, starting at $7.99 per month. Topo Maps US asks for nothing beyond the download.

Detector Maps holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 213 and 254 respectively. Written reviews complicate that: 88% of Topo Maps US's written reviews are positive against 73% of Detector Maps's, so the app with the better star average is not the one people write more warmly about.

Topo Maps US ships an update every 2 months, Detector Maps every 6 days. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Topo Maps US | Detector Maps |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (213 ratings)](https://appshunter.io/ios/app/topo-maps-us/id1033846196/reviews) | **[4.7 (254 ratings)](https://appshunter.io/ios/app/detector-maps/id6741421159/reviews)** |
| Number of ratings | 213 | **254** |
| Positive reviews | **87.5% of reviews** | 73.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 6 days** |
| Monetization | **Paid** | Subscription |
| Best chart rank | — | **#131** |
| Size | 5 MB | 115 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DC Cloud Apps, LLC](https://appshunter.io/developer/353416960) | [GOLD DISCOVERY SOLUTIONS PTY LTD](https://appshunter.io/developer/1788016705) |

## What reviewers say

### Topo Maps US

[App page](https://appshunter.io/ios/app/topo-maps-us/id1033846196)

Access and download detailed topographic maps of the United States for offline use. Track your location, mark waypoints, and record your routes for outdoor activities. Navigate with direction arrows and measure distances on the map.

**Highlights:** Download US topographic maps, Offline map viewing, GPS location tracking, Add and import waypoints (flags), Import and share GPX/LOC files, Record and share trails, Elevation profile charts

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Intuitive and simple user interface
- 📱 Works completely offline with downloaded maps
- 💰 Free app with no subscriptions or ads
- 🗺️ High-quality USGS topographic maps
- 📍 Accurate GPS location tracking

**What reviewers complain about**

- 🐛 White/gray blocks appearing on offline maps
- 🔋 High battery drain during route recording
- ❌ Limited color options for flags (only red)
- ⚠️ Route recording stops unexpectedly
- 🔍 No search functionality for trails/landmarks

**Reported bugs**

- White and gray blocks appearing on downloaded offline maps
- Route recording stops unexpectedly mid-hike
- High battery drain during route tracking
- GPX file import issues in iOS 13+
- Map display issues near borders

**Requested features**

- Pause/resume tracking during hikes
- Search feature for trails and landmarks
- Apple Watch app support
- CarPlay integration
- Slope shading visualization


### Detector Maps

[App page](https://appshunter.io/ios/app/detector-maps/id6741421159)

**Currently charting:** #131 Top Grossing · Navigation (US App Store)

This app provides advanced geological data and GPS tools for gold prospecting in Australia, the US, and New Zealand. It offers offline map access, breadcrumb tracking, and waypoint marking to help users explore efficiently and locate potential gold-bearing areas.

**Highlights:** Advanced geological and gold-focused data, Offline map and data layer downloads, Breadcrumb trail tracking (background GPS), Waypoint marking with field notes, Real-time GPS navigation, Historic gold mines and workings layers

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Explorer Plan | $7.99 | per month |
| Monthly Plan | $11.99 | per month |
| Yearly Explorer Plan | $59.99 | per year |
| Yearly Plan | $99.99 | per year |

**What reviewers like**

- 🚀 Good maps
- 👍 Extremely handy
- 👍 Helpful information
- 👍 Excellent app
- 👍 Fantastic app

**What reviewers complain about**

- 🐛 Missing areas
- 🐛 Discrepancies in data
- 🐛 LiDAR not working
- 🔒 Subscription issues

**Reported bugs**

- Issues with subscription and login
- LiDAR not working in certain areas

**Requested features**

- Expand coverage to more areas
- Improve data accuracy and consistency


## Frequently asked questions

### Is Topo Maps US free?

Topo Maps US is free to download, with no in-app purchases.

### Is Detector Maps free?

Detector Maps is free to download, with in-app purchases available.

### Which has better reviews, Topo Maps US or Detector Maps?

Detector Maps is rated higher. Topo Maps US averages 4.4 out of 5 from 213 ratings, while Detector Maps averages 4.7 from 254 ratings.

### Do Topo Maps US or Detector Maps have ads?

Detector Maps shows ads; Topo Maps US does not.

### Which is updated more often, Topo Maps US or Detector Maps?

Topo Maps US ships an update every 2 months, and Detector Maps every 6 days. Most recently, Topo Maps US was updated on October 15, 2026 and Detector Maps on October 12, 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.*