Comparison

MyShake Earthquake Alerts vs CoastWarn

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

Head to head
About

MyShake Earthquake Alerts

Get timely earthquake early warnings for California, Oregon, and Washington. Access safety tips, explore global earthquake data on a map, and contribute to a citizen-science seismic network. Receive notifications for earthquakes based on your region and magnitude preferences.

Highlights
  • Earthquake Early Warnings
  • Earthquake Safety Tips
  • Global Earthquake Map
  • Customizable Notifications
  • Citizen-Science Seismic Network
  • Multilingual Support
Features
Currently charting
Read full description

MyShake is a comprehensive and free earthquake app offering these features: Earthquake Early Warnings Receive timely, potentially life-saving early warning alerts in California, Oregon and Washington. MyShake uses the USGS ShakeAlertTM system to deliver alerts for earthquakes of magnitude 4.5 (or greater) several seconds before shaking arrives. Earthquake Safety View safety tips for earthquake preparedness such as securing hazardous or moveable items and creating a disaster plan. Know what to do during an earthquake and learn more about Drop, Cover and Hold On! Earthquake Map and Details View and explore a map of earthquakes around the world and get detailed information such as earthquake magnitude, location and depth. Share your own experience of an earthquake and see community reports of shaking and damage. Earthquake Notifications Stay informed of earthquakes as they occur by receiving notifications on your phone. Select your regions of interest and the earthquake magnitude. You’ll never miss out on any earthquake greater than magnitude 3.5! Smartphone-Based Global Seismic Network Participate in a smartphone-based global seismic network. In this research project, your phone becomes a mini-seismometer and contributes to the detection of earthquakes wherever you are. This global citizen-science based seismic network has the potential to provide early warning earthquake alerts in every region of the world, even in the absence of traditional seismic networks! About Us MyShake is developed by the University of California, Berkeley, Seismology Lab and funded by the California Governor’s Office of Emergency Services. The Berkeley Seismology Lab conducts essential research on earthquakes and solid earth processes while collecting and delivering high quality geophysical data. MyShake is available in English, Spanish (Español), Chinese Traditional (繁體中文), Filipino, Korean (한국인), and Vietnamese (Tiếng Việt). MyShake is available to everyone for free with no ads and no subscription! Learn more at http://myshake.berkeley.edu/

About

CoastWarn

Receive timely alerts for coastal flooding based on your custom water-level thresholds. Monitor NOAA data, get tide charts, and stay informed about potential flood events affecting your property or boat.

Highlights
  • Customizable flood alert thresholds
  • NOAA water-level monitoring
  • Tide charts and predictions
  • Flood expected notifications
  • Alert history
  • Station map search
Features
Read full description

CoastWarn monitors official NOAA water-level data and alerts you when observed levels reach the threshold you set. If you live, work, or keep a boat on the coast, you know the drill: nuisance flooding that soaks your car, a dock line that needs more slack, a driveway that disappears at high tide. CoastWarn helps you keep track of the water levels that matter to you. HOW IT WORKS - Find a supported NOAA station using your ZIP code or the station map. - Set the water-level threshold that matters to your property or boat. - Receive flood alerts and all-clear notifications, with current readings and trends. - See “Flood Expected” notices when supported regional forecasts predict your threshold will be reached. BUILT FOR COASTAL REALITY - Official NOAA CO-OPS water-level observations and tide predictions. - Adjustable alert thresholds at eligible stations. - Time-sensitive notifications for minor-or-higher flood alerts, subject to your iPhone’s notification settings. - Tide charts and regional model projections where available. - Alert history, monitoring status, and notices when monitoring is interrupted. WHO IT’S FOR Waterfront homeowners · boaters and marina tenants · coastal businesses · anyone who lives with a rising tide TRY IT FREE CoastWarn is free for 7 days. Continue with CoastWarn Pro Lifetime: a single $19.99 purchase that unlocks the app’s features with no subscription or renewal. No user account required. Restore Purchases is available in Settings. Data, forecasts, and alert monitoring vary by station. Alert delivery depends on current data, connectivity, notification permissions, and iOS scheduling. CoastWarn supplements official warnings; always follow National Weather Service guidance and local emergency instructions.

Screenshots

MyShake Earthquake Alerts4 screens
CoastWarn4 screens

Verdict

The call

The clearest difference is rating: CoastWarn at 5.0 against MyShake Earthquake Alerts's 3.3. CoastWarn also leads on update cadence (every 6 days vs every 3 months). MyShake Earthquake Alerts's advantage is in-app purchases (none vs 1) and ratings volume (1.9K vs 1). On price and ads 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. CoastWarn sells 1 one-off in-app purchase. MyShake Earthquake Alerts asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

CoastWarn holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: MyShake Earthquake Alerts has 1.9K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

MyShake Earthquake Alerts ships an update every 3 months, CoastWarn every 6 days. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.

Scorecard8 real differences · 3 level
MyShake Earthquake Alerts versus CoastWarn: the parameters behind the verdict, then further details
ParameterMyShake Earthquake AlertsCoastWarn
PriceFreeFree
Rating3.3 (1.9K ratings)5.0 (1 ratings) — better
Positive reviews51.3% of reviews—
Number of ratings1.9K — better1
Update frequencyEvery 3 monthsEvery 6 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank#59 — better—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.6 — better17.0
Further details — not scored
Size135 MB3 MB
Age rating4+4+
DeveloperUniversity of California, BerkeleyRyan Dean

Customer experience

MyShake Earthquake Alerts

All ratings1,913 ratings
Positive52.1%
Neutral9.5%
Negative38.5%
Written reviews228 reviews
Positive51.3%
Neutral9.6%
Negative39.0%

CoastWarn

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

MyShake Earthquake Alerts

Reported bugs

3 issues
  • App freezing or crashing when reporting earthquakes
  • Inconsistent or outdated earthquake data
  • Location services not working as expected

Requested features

5 requests
  • Customizable alert settings by location
  • Louder and more distinct alert sounds
  • Support for iPad and tablet devices
  • Ability to view historical earthquake data
  • Integration with other emergency systems

CoastWarn

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

MyShake Earthquake Alerts

No in-app purchases

1 purchases

CoastWarn

One-time1
  • CoastWarn Lifetime Unlock$19.99

Questions

Is MyShake Earthquake Alerts free?
MyShake Earthquake Alerts is free to download, with no in-app purchases.
Is CoastWarn free?
CoastWarn is free to download, with in-app purchases available.
Which has better reviews, MyShake Earthquake Alerts or CoastWarn?
CoastWarn is rated higher. MyShake Earthquake Alerts averages 3.3 out of 5 from 1.9K ratings, while CoastWarn averages 5.0 from 1 ratings.
Do MyShake Earthquake Alerts or CoastWarn have ads?
Neither MyShake Earthquake Alerts nor CoastWarn shows ads.
Which is updated more often, MyShake Earthquake Alerts or CoastWarn?
MyShake Earthquake Alerts ships an update every 3 months, and CoastWarn every 6 days. Most recently, MyShake Earthquake Alerts was updated on November 11, 2026 and CoastWarn on October 31, 2026.

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