Comparison

SEA.AI vs CH16

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

Head to head
About

SEA.AI

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Increase your vigilance and improve your safety at sea with the SEA.AI application, the user interface of a marine optical system based on artificial vision. SEA.AI increases your vigilance and detects floating objects early, using thermal and optical cameras to catch even objects that escape conventional Β­systems such as Radar or AIS, reducing the risk of a marine collision. Compatibility: SEA.AI Sentry, SEA.AI Brain, SEA.AI Watchkeeper Disclaimer: This application is to be used as navigation assistance only. It is the sole responsibility of the captain and all crew members to comply with navigation rules and to ensure that all safety instructions and procedures comply with local regulations.

About

CH16

This maritime safety app provides instant access to global rescue coordination centers and features tools for generating distress messages and planning voyages. It offers real-time location tracking for man overboard situations and works offline, ensuring safety at sea.

Highlights
  • Global maritime rescue center directory
  • Interactive SRR zone map
  • GMDSS-compliant distress message generator
  • Man Overboard (MOB) mode with GPS tracking
  • Passage Plan for voyage declaration
  • Offline functionality
  • Multilingual support
Features
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CH16 by Global SAR Hub is the essential maritime safety app for every seafarer. Instantly access contact details for over 350 maritime rescue coordination centers (MRCC, MRSC, JRCC, JRSC) worldwide. View Search and Rescue Regions (SRR) on an interactive map and identify the center responsible for your current position in real time. Generate IMO/GMDSS-compliant MAYDAY and PAN PAN distress messages with audio playback. Activate Man Overboard (MOB) mode to record a GPS position and guide you back to the drop point. NEW - Passage Plan: declare your route and automatically notify all rescue centers along your way, in their own language. An essential step for your safety at sea. Get notifications when you cross into a new SRR zone. Save your vessel and captain information to automatically include them in your messages and passage plans. Available in 6 languages. Works offline. Key features: β€’ Global directory of 350+ maritime rescue centers β€’ Interactive SRR zone map with automatic detection β€’ GMDSS-compliant MAYDAY / PAN PAN message generator β€’ Audio playback of distress messages β€’ Man Overboard mode with GPS tracking and DMD format β€’ Real-time MOB map view β€’ Passage Plan: multilingual voyage declaration to RCCs β€’ Persistent vessel and captain profiles β€’ Voice recording of vessel name β€’ SRR zone change notifications β€’ Multilingual country search β€’ 6 languages: EN, FR, ES, PT, IT, DE β€’ Full offline mode Terms of Use (EULA): https://www.globalsarhub.com/terms-of-use.html Privacy Policy: https://www.globalsarhub.com/privacy-policy.html

Screenshots

SEA.AI4 screens
CH163 screens

Verdict

The call

The clearest difference is in-app purchases: SEA.AI at none against CH16's 2. SEA.AI also leads on ads (none vs shown). CH16's advantage is iOS requirement (13.0 vs 17.0). On price, update cadence and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. CH16 sells 2 in-app purchases, starting at $0.99 per month. SEA.AI asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.

Scorecard3 real differences Β· 5 level
SEA.AI versus CH16: the parameters behind the verdict, then further details
ParameterSEA.AICH16
PriceFreeFree
Positive reviewsβ€”100.0% of reviews
Update frequencyEvery 2 monthsEvery 2 months
AdsNo β€” betterYes
In-app purchasesNo β€” betterYes
Monetizationβ€”Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod β€” better
Requires iOS17.013.0 β€” better
Further details β€” not scored
Size3 MB80 MB
Age rating4+4+
DeveloperSEA.AI SASGlobal SAR Hub

In-app purchases

None

SEA.AI

No in-app purchases

2 purchases

CH16

Subscriptions1
  • CH16 Pro7 Days trial$0.991 Month
One-time1
  • CH16 Pro Lifetime$4.99

Questions

Is SEA.AI free?
SEA.AI is free to download, with no in-app purchases.
Is CH16 free?
CH16 is free to download, with in-app purchases available.
Do SEA.AI or CH16 have ads?
CH16 shows ads; SEA.AI does not.
Which is updated more often, SEA.AI or CH16?
SEA.AI ships an update every 2 months, and CH16 every 2 months. Most recently, SEA.AI was updated on October 10, 2026 and CH16 on October 2, 2026.

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