Temblor vs CalMatters
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Temblor
Understand your personal earthquake risk with detailed information and real-time global earthquake data. Receive notifications for nearby quakes and access news and analyses on earthquake science and events.
- Personalized earthquake risk assessment
- Global earthquake monitoring
- Real-time quake notifications
- Hazard map layers (shaking, liquefaction)
- Earthquake news and analysis
- View global fault lines
Read full descriptionHide full description
Temblor gives individuals the tools to understand their personal earthquake risk. Temblor provides free individualized earthquake risk information to the public. It’s the same basic info that we license to the insurance industry — the difference being volume of locations and depth of the analysis. This distinguishes us from other risk model vendors (e.g., RMS, AIR, CoreLogic), which are closed to the public. “Impressive Earthquake App. Way more here than the other 'earthquake apps.'” — J.D. Check your risk Under the “Your Risk” tab, enter your home address (or a city, state or geographic landmark) or find your location and instantly see the earthquake magnitude that location is likely to experience in your lifetime. Use the map layers to explore various hazards including shaking, liquefaction susceptibility, wildfire hazard and more (depending on location). Check your risk everywhere on Earth. Pan and zoom to view all recent earthquakes anywhere on the planet. Temblor merges earthquake catalogs from the major seismic agencies around the world into one real-time display of global earthquakes in the past 24 hours, 2 days, 7 days or 30 days. View faults throughout the world or in your backyard. Quake Alerts Temblor will send you a notification when an earthquake strikes near your location. This is NOT an earthquake early warning and is not intended to inform you of impending shaking. Various agencies around the world distribute early earthquake warnings to earthquake-prone regions. We encourage you to seek out your local agency to receive such alerts. Temblor Earthquake News “Articles” brings you to Temblor Earthquake News, a news platform dedicated to earthquake reporting. Temblor’s mission is to provide the public with accurate, accessible, and understandable information about earthquakes. Read breaking news about major earthquakes, post-quake analyses and the latest developments in earthquake science in easy-to-understand language. Following major or particularly notable quakes, Temblor rapidly publishes accurate post-event analyses to inform the public and support institutional and commercial responses. Temblor is an approved Google News source and has been cited in major news outlets.
CalMatters
Access in-depth, nonpartisan news and analysis focused on California's quality of life issues. Hold leaders accountable with investigative journalism covering the Golden State and its global economic impact.
- In-depth news analysis
- Focus on quality of life issues
- Investigative journalism
- Accountability reporting
- Covers California and its economy
Read full descriptionHide full description
CalMatters is a nonpartisan and nonprofit news organization bringing Californians stories that probe, explain and explore solutions to quality of life issues while holding our leaders accountable. We are the only journalism outlet dedicated to covering America’s biggest state, 39 million Californians and the world’s fifth largest economy.
Screenshots
Verdict
The clearest difference is rating: CalMatters at 5.0 against Temblor's 3.8. CalMatters also leads on in-app purchases (none vs 1) and update cadence (fortnightly vs every 2 months). Temblor's advantage is iOS requirement (11.0 vs 15.0). On price, review sentiment, ratings volume 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
Both are free to download. Temblor sells 1 one-off in-app purchase. CalMatters asks for nothing beyond the download.
CalMatters holds the better App Store score, 5.0 against 3.8. Both are backed by a comparable volume of ratings — 12 and 18 respectively. Written reviews complicate that: 53% of Temblor's written reviews are positive against 50% of CalMatters's, so the app with the better star average is not the one people write more warmly about.
Temblor ships an update every 2 months, CalMatters fortnightly. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.
| Parameter | Temblor | CalMatters |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (12 ratings) | 5.0 (18 ratings) — better |
| Positive reviews | 52.6% of reviews — better | 50.0% of reviews |
| Number of ratings | 12 | 18 — better |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Best chart rank | — | #210 — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 16 MB | 53 MB |
| Age rating | 4+ | 12+ |
| Developer | Temblor, Inc. | CalMatters |
Customer experience
Temblor
CalMatters
In-app purchases
Temblor
- Unlock Additional Notification Criteria and Remove Ad's$0.99
CalMatters
No in-app purchases









