Meridian Nav Downloads & RevenueMeridian Nav · App Store
Meridian Nav is #170 in Navigation Paid in South Korea and charting in 1 of 30 countries we track.
Updated 11 Nov 2026 · rankings refresh through the day
DeveloperSEUNGHYEOK CHOI
CategoryNavigation
Price1.99 AUD
Released
Rating★ 0.0 (0)
Version1.3.0
Age rating4+
First seen by us
25 Sep 2026
25 Sep 2026📈New best rank in the overall chart: #144📈Charting in a new country🆕First spotted by AppInsider📦Version 1.3.0🆕Released on the App Store
Full timeline · 8 events
- 📈Meridian Nav new best rank in the overall chart: #144Top Paid · All Apps · TR
- 📈Meridian Nav charting in a new countryTurkey
- 📈Meridian Nav charting in a new countryThailand
- 📈Meridian Nav entered the top 100Top Paid · Navigation · AU
- 📈Meridian Nav charting in a new countryAustralia
- 🆕Meridian Nav first spotted by AppInsider#79 in Top Paid · Navigation · South Korea
- 📦Meridian Nav version 1.3.0• Amplitude compass check — verify gyro/compass error against the rising
or setting Sun. Event time and declination are computed automatically.
• New Latitude panel (Noon / Polaris) — latitude by the noon Sun with a
live meridian-passage predictor, or by Polaris at twilight. No tables
needed.
• Celestial fix plot — reduced sights now draw on a plotting sheet:
lines of position, the least-squares fix and its scatter, at a glance.
• Moon phase — the Sun / Moon screen now shows an illustrated phase disc
with the illuminated fraction and the Moon's age.
• Higher-resolution offline chart — coastlines sharpen automatically as
you zoom in.
• Clock Plan improvements — zone-change scheduling is now DST-aware and
aligns each change to the ship's actual local zone.
• Built-in glossary — every calculator's help now explains the terms and
abbreviations it uses (Zn, Ho, intercept, amplitude, and more).
• Celestial engine validated against JPL ephemeris data — Sun, Moon,
planets and 63 navigation stars agree to arc-minute accuracy.… more - 🆕Meridian Nav released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
0.0 ★
0 ratings
Measured
Best rank now
#170
Navigation PaidMeasured
Meridian Nav on the App Store
App details
App ID
6774504786
Publisher
SEUNGHYEOK CHOI
On the store since
Jun 2026
Under a year
Minimum OS
iOS 13.0+
iPhone 6s and later
Devices
iPhone · iPad
Content rating
4+
Languages
1
EN
Size
38 MB
Also listed in
Reference
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| South Korea | NavigationPaid | #170 |
Apps near Meridian Nav on the chart
Navigation Paid, around #170.
Ratings
App Store, worldwide.
Rating
0.0 ★
0 ratings
Measured
Ratings
0
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
under 1
4-week average
Lifetime rating
5.0★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
20/100
faster than 0% of Navigation apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About Meridian Nav
Meridian is a celestial navigation toolkit built at sea by a working deck
officer — 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
— get your line of position.
COMPASS ERROR
Check gyro error by azimuth of any celestial body — 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 — 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 — 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 —
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 — Sun, Moon, planets and 63 navigational stars — 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 (0.000° 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.
officer — 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
— get your line of position.
COMPASS ERROR
Check gyro error by azimuth of any celestial body — 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 — 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 — 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 —
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 — Sun, Moon, planets and 63 navigational stars — 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 (0.000° 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.
Latest updates
1.3.0
• Amplitude compass check — verify gyro/compass error against the rising
or setting Sun. Event time and declination are computed automatically.
• New Latitude panel (Noon / Polaris) — latitude by the noon Sun with a
live meridian-passage predictor, or by Polaris at twilight. No tables
needed.
• Celestial fix plot — reduced sights now draw on a plotting sheet:
lines of position, the least-squares fix and its scatter, at a glance.
• Moon phase — the Sun / Moon screen now shows an illustrated phase disc
with the illuminated fraction and the Moon's age.
• Higher-resolution offline chart — coastlines sharpen automatically as
you zoom in.
• Clock Plan improvements — zone-change scheduling is now DST-aware and
aligns each change to the ship's actual local zone.
• Built-in glossary — every calculator's help now explains the terms and
abbreviations it uses (Zn, Ho, intercept, amplitude, and more).
• Celestial engine validated against JPL ephemeris data — Sun, Moon,
planets and 63 navigation stars agree to arc-minute accuracy.