# thEarthquake Tracker vs CDAS

The clearest difference is in-app purchases: CDAS at none against thEarthquake Tracker's 2. CDAS also leads on iOS requirement (11.0 vs 13.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. thEarthquake Tracker sells 2 one-off in-app purchases. CDAS asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on September 17, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | thEarthquake Tracker | CDAS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/thearthquake-tracker/id1090616122/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 185 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ThirdHalf.com, LLC](https://appshunter.io/developer/914115418) | [Nebula Link Technology Group Co., Ltd.](https://appshunter.io/developer/1100580362) |

## What reviewers say

### thEarthquake Tracker

[App page](https://appshunter.io/ios/app/thearthquake-tracker/id1090616122)

Stay informed about global seismic activity with real-time earthquake updates. Receive instant notifications when tremors occur, ensuring you're always aware of potential hazards.

**Highlights:** Real-time earthquake data, Global coverage, Instant notifications, Awareness of seismic events

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| thEarthQuake Remove Advertising | $0.99 | one-time |
| thEarthquake Tip Jar | $0.99 | one-time |


### CDAS

[App page](https://appshunter.io/ios/app/cdas/id1536370528)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is thEarthquake Tracker free?

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

### Is CDAS free?

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

### Do thEarthquake Tracker or CDAS have ads?

Neither thEarthquake Tracker nor CDAS shows ads.

### Which is updated more often, thEarthquake Tracker or CDAS?

thEarthquake Tracker ships an update every 3 months, and CDAS every 3 months. Most recently, thEarthquake Tracker was updated on September 17, 2026 and CDAS on September 15, 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.*