# GPT vs Depthly

The clearest difference is in-app purchases: GPT at none against Depthly's 3. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Depthly sells 3 in-app purchases, starting at $3.99 per month. GPT asks for nothing beyond the download.

## The numbers

| Metric | GPT | Depthly |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Monetization | Free | — |
| Size | 51 MB | 23 MB |
| Requires iOS | 17.2 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yu Lung WANG](https://appshunter.io/developer/1446755314) | [Ivan Blajic](https://appshunter.io/developer/1457447712) |

## What reviewers say

### GPT

[App page](https://appshunter.io/ios/app/gpt-gpacers-poseidon-tracker/id1446755315)

Real-time marine safety tracking with smart alerts and offline support. This system ensures full visibility and control over your team, even without internet access, and logs all activity for traceability.

**Highlights:** Real-time tracking map, Advanced alert system (boundary, collision, lost signal), Offline operation support, Black box data logging, Simulator mode for training, Smart team management

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

**In-app purchases:** none


### Depthly

[App page](https://appshunter.io/ios/app/depthly-sea-depth/id6796852299)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $3.99 | per month |
| Annual Premium | $8.99 | per year |
| Lifetime Premium | $24.99 | one-time |


## Frequently asked questions

### Is GPT free?

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

### Is Depthly free?

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

### Do GPT or Depthly have ads?

Neither GPT nor Depthly shows ads.

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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.*