# CTT Marine vs DNOR

CTT Marine and DNOR are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CTT Marine ships an update every 2 months, DNOR every 3 months. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | CTT Marine | DNOR |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 57 MB | 140 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cellular Tracking Technologies](https://appshunter.io/developer/1588087267) | [Yee Hon Cong](https://appshunter.io/developer/1785787499) |

## What reviewers say

### CTT Marine

[App page](https://appshunter.io/ios/app/ctt-marine/id6502104757)

**Features:** macOS Compatibility

**In-app purchases:** none


### DNOR

[App page](https://appshunter.io/ios/app/dnor/id6739514334)

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

**In-app purchases:** none


## Frequently asked questions

### Is CTT Marine free?

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

### Is DNOR free?

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

### Do CTT Marine or DNOR have ads?

Neither CTT Marine nor DNOR shows ads.

### Which is updated more often, CTT Marine or DNOR?

CTT Marine ships an update every 2 months, and DNOR every 3 months. Most recently, CTT Marine was updated on October 30, 2026 and DNOR on October 25, 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.*