# DepremAlarm vs TerraWatch

The clearest difference is in-app purchases: DepremAlarm at none against TerraWatch's 1. TerraWatch's advantage is iOS requirement (17.0 vs 26.2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. TerraWatch sells 1 one-off in-app purchase. DepremAlarm asks for nothing beyond the download.

DepremAlarm ships an update every 3 days, TerraWatch every 5 days. The most recent releases landed on October 19, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | DepremAlarm | TerraWatch |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 5 days |
| Size | 5 MB | 1 MB |
| Requires iOS | 26.2 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ATILLA KUSEYRI](https://appshunter.io/developer/1884074993) | [Tolga Ulutas](https://appshunter.io/developer/1867266654) |

## What reviewers say

### DepremAlarm

[App page](https://appshunter.io/ios/app/depremalarm/id6761308385)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### TerraWatch

[App page](https://appshunter.io/ios/app/terrawatch/id6762412658)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TerraWatch Pro | $2.99 | one-time |


## Frequently asked questions

### Is DepremAlarm free?

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

### Is TerraWatch free?

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

### Do DepremAlarm or TerraWatch have ads?

Neither DepremAlarm nor TerraWatch shows ads.

### Which is updated more often, DepremAlarm or TerraWatch?

DepremAlarm ships an update every 3 days, and TerraWatch every 5 days. Most recently, DepremAlarm was updated on October 19, 2026 and TerraWatch on October 8, 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.*