Comparison

HMM e vs Meridian Nav

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

Head to head
About

HMM e

Features
Read full description

HMM's mobile app makes it easy to use HMM's various services and Hi Quote anytime, anywhere! Key Features: 1. Dashboards at a Glance: Visualized bookings, Freight and Hi Quote Status intuitively 2. Hi Quote and Cargo Booking: Quickly receive Quotes from Mobile Devices and easily book cargo 3. Real-time Cargo Information and Schedule Inquiry: Real-time cargo information and up-to-date schedule inquiry to transport cargo 4. Key Reminder and Cargo Update Push Reminder: Immediately Announce Key Remarks and Cargo Changes 5. Various other convenience functions : HMM News as well as various convenience functions such as DEM/DET, Loop, and contact information

About

Meridian Nav

This app provides comprehensive offline marine navigation tools for sailors. It offers GPS tracking, offline chart display, route management, and various celestial and navigational calculations. All features are accessible without an internet connection.

Highlights
  • Offline GPS position monitoring
  • Offline chart and waypoint display
  • .rtz route import and management
  • Navigation calculations
  • Celestial body data
  • Sun/moon event times
Features
Read full description

Meridian is a celestial navigation toolkit built at sea by a working deck officer β€” fully offline, because mid-ocean is exactly where you need it. SIGHT REDUCTION Compute Hc, Zn and intercept for the Sun, Moon, four planets and 63 navigational stars. Enter your DR position, date/time and sextant altitude β€” get your line of position. COMPASS ERROR Check gyro error by azimuth of any celestial body β€” the daily routine, without the almanac and tables. Magnetic variation (WMM2025) is built in for magnetic compass work. STAR FINDER A polar sky-dome view shows exactly which bodies are observable right now from your position β€” plan your twilight sights before stepping out on the bridge wing. Includes an azimuth-scatter view for picking the best LOP geometry. SUN / MOON Rise, set, meridian passage and twilight times for any position and date. MARINE CHART β€” FULLY OFFLINE A custom offline vector chart with world time-zone (ZD) boundaries, DST awareness, ports and waypoint routes. Import route files (.rtz / .rou) straight from your ECDIS. CLOCK PLAN Generate the entire voyage's retard/advance schedule from your route β€” including DST transitions and solar-zone departures. Reorder or edit the changes, then export a clean calendar-style PDF or Excel notice, ready to post on board. UNIT CONVERTER The conversions a navigator actually uses, in two taps. ACCURACY & VALIDATION Every body β€” Sun, Moon, planets and 63 navigational stars β€” is cross-checked against JPL ephemeris data (the same source behind the official Nautical Almanac) to arc-minute agreement. Star positions are computed for the current date from the ESA Hipparcos catalogue. Sun azimuth verified at sea against a ship's bridge calculator, and against NOAA's solar calculator (0.000Β° difference). MADE FOR Deck officers who want a fast backup and sanity check, cadets and officers studying celestial navigation, and anyone who believes a navigator should still be able to find a ship without a satellite. No account. No ads. No subscription. No internet required. One-time purchase. IMPORTANT Meridian is a reference and training aid for celestial navigation. It is not a certified navigation system and does not replace official nautical publications, charts, or type-approved equipment.

Screenshots

HMM e4 screens
Meridian Nav4 screens

Verdict

The call

The clearest difference is price: HMM e at Free against Meridian Nav's $0.99. Meridian Nav's advantage is update cadence (every 6 days vs every 5 months). On ads, in-app purchases, device support and iOS requirement 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

HMM e is free to download; Meridian Nav costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

HMM e ships an update every 5 months, Meridian Nav every 6 days. The most recent releases landed on October 27, 2026 and November 10, 2026 respectively.

Scorecard2 real differences Β· 6 level
HMM e versus Meridian Nav: the parameters behind the verdict, then further details
ParameterHMM eMeridian Nav
PriceFree β€” better$0.99
Positive reviewsβ€”100.0% of reviews
Update frequencyEvery 5 monthsEvery 6 days β€” better
AdsNoNo
In-app purchasesNoNo
Monetizationβ€”Paid
DevicesiPhone, iPad, iPod β€” betteriPhone, iPod
Requires iOS13.013.0
Further details β€” not scored
Size44 MB36 MB
Age rating17+4+
DeveloperHMM Corp. Ltd.SEUNGHYEOK CHOI

In-app purchases

None

HMM e

No in-app purchases

None

Meridian Nav

No in-app purchases

Questions

Is HMM e free?
HMM e is free to download, with no in-app purchases.
Is Meridian Nav free?
Meridian Nav costs $0.99, with no in-app purchases.
Do HMM e or Meridian Nav have ads?
Neither HMM e nor Meridian Nav shows ads.
Which is updated more often, HMM e or Meridian Nav?
HMM e ships an update every 5 months, and Meridian Nav every 6 days. Most recently, HMM e was updated on October 27, 2026 and Meridian Nav on November 10, 2026.

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