Comparison

CH16 vs TradeOnSea

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

Head to head
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
Read full description

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: • Global directory of 350+ maritime rescue centers • Interactive SRR zone map with automatic detection • GMDSS-compliant MAYDAY / PAN PAN message generator • Audio playback of distress messages • Man Overboard mode with GPS tracking and DMD format • Real-time MOB map view • Passage Plan: multilingual voyage declaration to RCCs • Persistent vessel and captain profiles • Voice recording of vessel name • SRR zone change notifications • Multilingual country search • 6 languages: EN, FR, ES, PT, IT, DE • Full offline mode Terms of Use (EULA): https://www.globalsarhub.com/terms-of-use.html Privacy Policy: https://www.globalsarhub.com/privacy-policy.html

About

TradeOnSea

Read full description

TradeOnSea est une application pensée pour les navigateurs, plaisanciers, capitaines, équipiers et voyageurs en mer. L’app permet de publier et consulter des annonces maritimes autour de vous : matériel nautique, services, dons, trocs, recherches, places à bord et demandes d’équipage. TradeOnSea facilite aussi les échanges entre utilisateurs grâce à une messagerie intégrée, aux profils, aux favoris et aux informations de contact choisies par chaque utilisateur. Fonctionnalités principales : • Publier des annonces maritimes géolocalisées • Rechercher du matériel, des services ou des opportunités autour de soi • Trouver un capitaine, un équipier ou une place à bord • Voir les annonces sur une carte • Contacter les utilisateurs via la messagerie intégrée • Utiliser les favoris pour retrouver facilement les annonces importantes • Signaler un problème ou une annonce inappropriée • Accéder à une fonction d’urgence pour prévenir les utilisateurs proches en cas de besoin TradeOnSea a été conçu pour aider la communauté maritime à se connecter plus facilement, partager des ressources, trouver de l’aide et créer des liens entre bateaux, ports, mouillages et équipages. L’application s’adresse aux personnes vivant, voyageant ou travaillant autour du monde maritime.

Screenshots

CH163 screens
TradeOnSea4 screens

Verdict

The call

The clearest difference is in-app purchases: TradeOnSea at none against CH16's 2. TradeOnSea also leads on ads (none vs shown) and update cadence (every 11 days vs every 2 months). CH16's advantage is iOS requirement (13.0 vs 15.1). On price and device support 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. CH16 sells 2 in-app purchases, starting at $0.99 per month. TradeOnSea asks for nothing beyond the download.

UpkeepUpdate frequency

CH16 ships an update every 2 months, TradeOnSea every 11 days. The most recent releases landed on October 2, 2026 and October 14, 2026 respectively.

Scorecard4 real differences · 4 level
CH16 versus TradeOnSea: the parameters behind the verdict, then further details
ParameterCH16TradeOnSea
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyEvery 2 monthsEvery 11 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size80 MB100 MB
Age rating4+4+
DeveloperGlobal SAR HubJEROME LABARTHE

In-app purchases

2 purchases

CH16

Subscriptions1
  • CH16 Pro7 Days trial$0.991 Month
One-time1
  • CH16 Pro Lifetime$4.99
None

TradeOnSea

No in-app purchases

Questions

Is CH16 free?
CH16 is free to download, with in-app purchases available.
Is TradeOnSea free?
TradeOnSea is free to download, with no in-app purchases.
Do CH16 or TradeOnSea have ads?
CH16 shows ads; TradeOnSea does not.
Which is updated more often, CH16 or TradeOnSea?
CH16 ships an update every 2 months, and TradeOnSea every 11 days. Most recently, CH16 was updated on October 2, 2026 and TradeOnSea on October 14, 2026.

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