Comparison

app4sail lite vs CH16

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

Head to head
About

app4sail lite

This nautical navigation application utilizes free S57 vector charts for charting. It provides essential navigation tools for mariners on iOS devices.

Highlights
  • S57 nautical vector charts
  • Free chart usage
  • Nautical navigation
  • iOS compatible
Features
Read full description

nautical navigation app. Uses free S57 nautical vector charts

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

Screenshots

app4sail lite1 screens
CH163 screens

Verdict

The call

The clearest difference is review sentiment: CH16 at 100% against app4sail lite's 0%. CH16 also leads on update cadence (every 2 months vs every 4 months). app4sail lite's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, device support and iOS requirement 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. app4sail lite asks for nothing beyond the download.

UpkeepUpdate frequency

app4sail lite ships an update every 4 months, CH16 every 2 months. The most recent releases landed on September 10, 2026 and September 6, 2026 respectively.

Scorecard5 real differences · 5 level
app4sail lite versus CH16: the parameters behind the verdict, then further details
Parameterapp4sail liteCH16
PriceFreeFree
Rating1.0 (1 ratings) — better—
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings1 — better—
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size9 MB80 MB
Age rating4+4+
Developeranton van oostenGlobal SAR Hub

Customer experience

app4sail lite

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

CH16

Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

app4sail lite

No in-app purchases

2 purchases

CH16

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

Questions

Is app4sail lite free?
app4sail lite is free to download, with no in-app purchases.
Is CH16 free?
CH16 is free to download, with in-app purchases available.
Do app4sail lite or CH16 have ads?
CH16 shows ads; app4sail lite does not.
Which is updated more often, app4sail lite or CH16?
app4sail lite ships an update every 4 months, and CH16 every 2 months. Most recently, app4sail lite was updated on September 10, 2026 and CH16 on September 6, 2026.

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