Version history
Perpetual Nautical Almanac
43
ASO score
Text
36/100
Reviews
50/100
Graphic
60/100
Other
0/100
App Rating
2.3
Votes
9
App Age
7y 2m
Last Update
Feb 10, 2025
Compare with Category Top Apps
|
Metrics
|
Current App
|
Category Top Average
|
Difference
|
|---|---|---|---|
|
Rating
|
5
|
4.56
|
+10%
|
|
Number of Ratings (Voted)
|
2
|
266.3K
|
-100%
|
|
App Age
|
7y 2m
|
9y 2m
|
-22%
|
|
Price
|
$4
|
$1
|
+576%
|
|
In-app Purchases Price
|
$0
|
$37
|
|
|
Update Frequency
|
307d
|
66d
|
+367%
|
|
Title Length
|
26
|
24
|
+8%
|
|
Subtitle Length
|
0
|
27
|
|
|
Description Length
|
1 057
|
2 572
|
-59%
|
|
Number of Screenshots
|
702
|
1467
|
-52
%
|
|
Size
|
123MB
|
159MB
|
-23
%
|
Category Ranking in United States
7 days
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Last year
| Top | Dec 07, 2025 | Dec 14, 2025 |
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| Top | Dec 07, 2025 | Dec 14, 2025 |
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| Top | Dec 07, 2025 | Dec 14, 2025 |
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No results were found!
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| Top | Dec 07, 2025 | Dec 14, 2025 |
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No results were found!
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Ranking Keywords in United States
| Keywords | App Rank |
|---|
Analyze this and other apps using Asolytics tools
Text ASO
Title
(
Characters:
26
of 30
)
Perpetual Nautical Almanac
Subtitle
(
Characters:
0
of 30
)
Description
(
Characters:
1057
of 4000
)
Using the U.S. Naval Observatory NOVAS library and solar system ephemerides from JPL, high precision positions can be calculated in real-time from 1900 to 2050.
Simply select date and time and all values are recalculated instantly. The estimated elevation value is only needed for calculating sunrise/sunset, twilight, and moonrise/moonset.
The app provides the following functionalities:
*Aries: GHA position
*Sun:
-GHA/dec
- Astronomical dawn, nautical dawn, civil dawn, sunrise, sunset, civil dusk, nautical dusk, astronomical dusk, and meridian passage at Greenwich.
- Semidiameter
- Sunlight world map with the Sun and the Moon position.
*Moon:
- GHA/dec
- Moonrise/moonset and meridian passage at Greenwich.
- Semidiameter
- Moon phase and age of the Moon.
*Planets:
- GHA/dec for Venus, Mars, Jupiter, and Saturn.
*Stars:
- Magnitude, SHA/dec of 99 stars ordered by SHA.
*Corrections:
- Correction for the atmospheric refraction.
- Correction for the dip of the horizon.
- Parallax correction for the Moon, the Sun, Venus, and Mars.
}
Read more
Other
Additional Information
| Rating: | |
| Voted: | 9 |
| App Store Link: | |
| Price: | 3.99 $ |
| Website: | - |
| Email: | - |
| Privacy Policy: | |
| Categories: | Navigation |
| Size: | 122MB |
| App Age: | 7 years 2 months |
| Release Date: | Oct 17, 2018 |
| Last Update: | Feb 10, 2025 |
| Version: | 2.01 |
Version history
2.01
Feb 10, 2025
Correction for possible crash when retrieving GPS location. Corrected astronomical sunset & sunrise (duplicated nautical values were being displayed)
2.0
Sep 27, 2024
Version 2.0 enhancements:
- Completely redesigned interface, with several screens that facilitate the use and visualization of data. Compatibility with iPad in portrait orientation.
- Now you can enter hours, minutes and seconds when entering the time to perform the calculations, so you can now get the results with second precision.
- A function has also been added that allows you to convert the phone's local time and date to UTC in the date entry screen at the touch of a button.
- In the dedicated star view, now displays:
o Constellation with image.
o Hierarchy of the star within the constellation.
o SHA and Dec
o Apparent magnitude.
o Hemisphere in which it is observable.
o The list of stars can be sorted by:
* SHA
* Name of the star.
* Name of the constellation.
* Apparent magnitude.
o The list can be filtered by:
* Show all
* Only visible in the northern hemisphere.
* Only visible in the southern hemisphere.
* Visible in both hemispheres.
- In the calculations / corrections section, the function to calculate the true bearing of all celestial bodies supported by this application has been added.
In this view you can enter the estimated position of the ship and UTC time manually, or by pressing a button retrieve the GPS position of the iPhone/iPad and the time and date of the device converted to UTC. In this way it is quick and easy to calculate the error that the gyro compass or magnetic compass may have.