Comparison

Qastor vs ChatSea

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

Qastor

Marine Navigation and Pilotage

Secure maritime chat on sea

Free

🗺️ Navigation

No ratingsView app →

About

Qastor

Features

Read full description

A precise navigation software for piloting and docking, and with Under Keel Clearance capability and modes customized to specific, critical operations, Qastor also supports high-resolution overlays to expand navigable water, and real-time meteorological updates via the Connect Server, resulting in optimal situational awareness for pilots.

About

ChatSea

Read full description

Ch@tSea combines end-to-end encrypted 1:1 messaging with trusted maritime safety information, including navigational warnings and marine protected areas displayed directly on the map. Built on international maritime standards, Ch@tSea uses device-based certificates to verify users and protect communications, ensuring privacy and authenticity by design. Whether you’re sharing messages, exchanging locations, or staying informed about safety services from trusted providers, Ch@tSea helps you communicate with confidence—ship to shore.

Screenshots

Qastor3 screens

ChatSea4 screens

Verdict

The call

The clearest difference is in-app purchases: ChatSea at none against Qastor's 3. ChatSea also leads on update cadence (every 9 days vs every 2 months). Qastor's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 17.5). On price and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Qastor sells 3 in-app purchases, starting at $619.00 per year. ChatSea asks for nothing beyond the download.

UpkeepUpdate frequency

Qastor ships an update every 2 months, ChatSea every 9 days. The most recent releases landed on September 18, 2026 and September 26, 2026 respectively.

Scorecard4 real differences · 2 level

Qastor versus ChatSea: the parameters behind the verdict, then further details
Parameter	Qastor	ChatSea
Price	Free	Free
Update frequency	Every 2 months	Every 9 days — better
Ads	No	No
In-app purchases	Yes	No — better
Devices	iPhone, iPad, iPod — better	iPhone
Requires iOS	14.0 — better	17.5
Further details — not scored
Size	257 MB	39 MB
Age rating	4+	17+
Developer	Quality Positioning Services (Q.P.S.) B.V.	AIVeNautics

In-app purchases

3 purchases

Qastor

Subscriptions2

Navigation$619.001 Year
Navigation + Docking$989.001 Year

One-time1

14-day TrialFree

None

ChatSea

No in-app purchases

Questions

Is Qastor free?

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

Is ChatSea free?

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

Do Qastor or ChatSea have ads?

Neither Qastor nor ChatSea shows ads.

Which is updated more often, Qastor or ChatSea?

Qastor ships an update every 2 months, and ChatSea every 9 days. Most recently, Qastor was updated on September 18, 2026 and ChatSea on September 26, 2026.