# Temblor vs CalMatters

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.

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.

## The numbers

| Metric | Temblor | CalMatters |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (12 ratings)](https://appshunter.io/ios/app/temblor/id879904452/reviews) | **[5.0 (18 ratings)](https://appshunter.io/ios/app/calmatters/id6475375084/reviews)** |
| Number of ratings | 12 | **18** |
| Positive reviews | **52.6% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Best chart rank | — | **#210** |
| Size | 16 MB | 53 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Temblor, Inc.](https://appshunter.io/developer/950124291) | [CalMatters](https://appshunter.io/developer/1724098439) |

## What reviewers say

### Temblor

[App page](https://appshunter.io/ios/app/temblor/id879904452)

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.

**Highlights:** Personalized earthquake risk assessment, Global earthquake monitoring, Real-time quake notifications, Hazard map layers (shaking, liquefaction), Earthquake news and analysis, View global fault lines

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Additional Notification Criteria and Remove Ad's | $0.99 | one-time |


### CalMatters

[App page](https://appshunter.io/ios/app/calmatters/id6475375084)

**Currently charting:** #210 Top Free · Magazines & Newspapers (US App Store)

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.

**Highlights:** In-depth news analysis, Focus on quality of life issues, Investigative journalism, Accountability reporting, Covers California and its economy

**Features:** Apple Wallet, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Temblor free?

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

### Is CalMatters free?

CalMatters is free to download, with no in-app purchases.

### Which has better reviews, Temblor or CalMatters?

CalMatters is rated higher. Temblor averages 3.8 out of 5 from 12 ratings, while CalMatters averages 5.0 from 18 ratings.

### Do Temblor or CalMatters have ads?

Neither Temblor nor CalMatters shows ads.

### Which is updated more often, Temblor or CalMatters?

Temblor ships an update every 2 months, and CalMatters fortnightly. Most recently, Temblor was updated on October 7, 2026 and CalMatters 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.*