Best Usgd Apps

179+ iOS apps curated and reviewed

4.5 avg rating
17 free apps
Updated May 2026

Every iPhone needs a few good usgd apps. We benchmark 179+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Compare top Usgd Apps (May 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1National Park ServiceNational Park ServiceFree4.9★ (124K)NoNoSep 2026
2My Earthquake Alerts & FeedMy Earthquake Alerts & FeedFree4.7★ (145K)YesNoSep 2026
3Rivercast: River Levels USARivercast: River Levels USAFree4.7★ (11K)YesYesSep 2026
4QuakeFeed Earthquake AlertsQuakeFeed Earthquake AlertsFree4.8★ (100K)NoYesSep 2026
5Topo Maps USTopo Maps USFree4.4★ (206)NoNoSep 2026
6Instant USGS Earthquake LiteInstant USGS Earthquake LiteFree3.4★ (11)NoNoSep 2026
7Earthquake - alerts and mapEarthquake - alerts and mapFree4.7★ (50K)NoYesSep 2026
8Epicenter - Earthquake MapEpicenter - Earthquake MapFree4.4★ (39)NoYesSep 2026

Top Picks for Usgd

National Park Service#1

National Park Service by National Park Service

The official app of 420+ parks
Editor's Choice
✈️ Travel
4.9😊(124K ratings)
Free
#80in Travel
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Explore over 420 national parks with interactive maps, self-guided tours, and essential on-the-ground information. Plan your visit with details on amenities, operating hours, and fees. Download park content for offline use, ensuring access even without internet service.

What We Love

  • 👍 Helpful information on national parks
  • 🚀 Useful offline features
  • 💡 Ability to create lists of visited/to-visit parks
  • 🗺️ Interactive maps and GPS guidance
  • 📷 Photo features like creating postcards

Room to Improve

  • 🐛 Downloading issues and app crashes
  • 🔍 Difficulty finding specific information or navigating the app
  • 🗺️ Inconsistent or incomplete map and trail data
  • 🕰️ Outdated information on park hours and closures
  • 🔍 Lack of organization and filtering options
My Earthquake Alerts & Feed#2

My Earthquake Alerts & Feed by JRustonApps B.V.

US & Worldwide Earthquakes Map
Strong Contender
☀️ Weather
4.7😊(145K ratings)
FreeAds
#20in Weather
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Stay informed about seismic activity with real-time earthquake alerts and a comprehensive global map. Track quakes, receive instant notifications, and search historical data. This free, ad-supported application provides detailed information on location, depth, and distance.

What We Love

  • 🚀 Real-time earthquake alerts
  • 📍 Detailed earthquake information
  • ⚙️ Customizable notification settings
  • 🗺️ Intuitive map interface
  • 💡 Useful for monitoring earthquake activity

Room to Improve

  • 🐛 Missed earthquake notifications
  • 🔍 Inaccurate or delayed earthquake data
  • 🔌 High battery consumption
  • 🔧 Difficulty setting up location preferences
  • 💸 Paid version required for full functionality
Rivercast: River Levels USA#3

Rivercast: River Levels USA by Juggernaut Technology, Inc.

NOAA Forecasts & Flood Alerts
Worth Considering
☀️ Weather
4.7😊(11K ratings)
FreeAdsIn-App Purchases
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Monitor river levels, flow rates, and flood warnings with real-time data and forecasts. Get custom alerts for your favorite waterways and visualize trends with interactive graphs. Essential for anyone living, working, or recreating near water.

What We Love

  • 🚀 Great app
  • 👍 Easy to navigate
  • 👍 Helpful for monitoring river levels
  • 👍 Useful for fishing and boating
  • 👍 Accurate and up-to-date information
  • 👍 Necessary for those living near rivers
  • 👍 Excellent customer support

Room to Improve

  • 🐛 Data not always up-to-date
  • 🔒 Paid subscription required for full functionality
  • 🔒 Can't view more than 30 hours of data without premium
  • 🔒 Have to pay for each device
  • 🔒 Charging for free data available elsewhere

More Usgd apps to explore

FAQ about Usgd

What are the best usgd apps for iPhone?
National Park Service tops our usgd apps ranking as of May 2026, with a 4.9-star average from 124K App Store ratings, and it's free to download.
Yes — 17 of the top usgd apps we rank are free to download, including National Park Service and My Earthquake Alerts & Feed.
National Park Service has no ads and has no in-app purchases, according to its App Store listing as of May 2026.
We track 179+ usgd apps on the iOS App Store as of May 2026, ranked by rating, recency, and analysis of real user reviews.
The official NPS app serves as a comprehensive guide to over 420 national parks. It provides interactive maps, self-guided tours, information on amenities, operating hours, fees, and allows users to download park content for offline use.
Key features include interactive maps with points of interest and trails, self-guided tours, detailed amenity information (restrooms, dining), fee and pass details, accessibility options with audio descriptions, and the ability to download park content for offline access.

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