# iStreams Dover Strait vs Celestial Navigation 360

The clearest difference is update cadence: Celestial Navigation 360 at monthly against iStreams Dover Strait's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. iStreams Dover Strait sells 6 one-off in-app purchases and Celestial Navigation 360 sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

iStreams Dover Strait ships an update every 3 months, Celestial Navigation 360 monthly. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | iStreams Dover Strait | Celestial Navigation 360 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Size | 39 MB | 1 MB |
| Requires iOS | **18.4** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Navtech Software](https://appshunter.io/developer/355517263) | [Nicholas Braun](https://appshunter.io/developer/1018432793) |

## What reviewers say

### iStreams Dover Strait

[App page](https://appshunter.io/ios/app/istreams-dover-strait/id1455616051)

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock 'Set' tool | $1.99 | one-time |
| Dover Tides 2019 | $2.99 | one-time |
| 6 Month Subscription | $2.99 | one-time |
| 1 Month Subscription | $2.99 | one-time |
| Unlock CTS tool | $3.99 | one-time |
| 1 Year Subscription | $5.99 | one-time |


### Celestial Navigation 360

[App page](https://appshunter.io/ios/app/celestial-navigation-360/id6747285959)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| month | $4.99 | per month |
| year | $17.99 | per year |


## Frequently asked questions

### Is iStreams Dover Strait free?

iStreams Dover Strait is free to download, with in-app purchases available.

### Is Celestial Navigation 360 free?

Celestial Navigation 360 is free to download, with in-app purchases available.

### Do iStreams Dover Strait or Celestial Navigation 360 have ads?

Neither iStreams Dover Strait nor Celestial Navigation 360 shows ads.

### Which is updated more often, iStreams Dover Strait or Celestial Navigation 360?

iStreams Dover Strait ships an update every 3 months, and Celestial Navigation 360 monthly. Most recently, iStreams Dover Strait was updated on October 12, 2026 and Celestial Navigation 360 on October 7, 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.*