# iSpaceTransform vs MarineTraffic Inbox

The clearest difference is update cadence: MarineTraffic Inbox at monthly against iSpaceTransform's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

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

iSpaceTransform ships an update every 3 months, MarineTraffic Inbox monthly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | iSpaceTransform | MarineTraffic Inbox |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Size | 49 MB | 38 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Montegrow Pte. Ltd.](https://appshunter.io/developer/1616452407) | [Chart.IT Pte Ltd](https://appshunter.io/developer/1380049318) |

## What reviewers say

### iSpaceTransform

[App page](https://appshunter.io/ios/app/ispacetransform/id1621318823)

**Features:** macOS Compatibility

**In-app purchases:** none


### MarineTraffic Inbox

[App page](https://appshunter.io/ios/app/marinetraffic-inbox/id1632574610)

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

**In-app purchases:** none


## Frequently asked questions

### Is iSpaceTransform free?

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

### Is MarineTraffic Inbox free?

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

### Do iSpaceTransform or MarineTraffic Inbox have ads?

Neither iSpaceTransform nor MarineTraffic Inbox shows ads.

### Which is updated more often, iSpaceTransform or MarineTraffic Inbox?

iSpaceTransform ships an update every 3 months, and MarineTraffic Inbox monthly. Most recently, iSpaceTransform was updated on October 25, 2026 and MarineTraffic Inbox on October 24, 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.*