Sextant Calculator Downloads & RevenueSextant Calculator · App Store
Sextant Calculator is #15 in Navigation Paid in France and charting in 2 of 30 countries we track.
Updated 11 Nov 2026 · rankings refresh through the day
DeveloperWill Downing
CategoryNavigation
Price1.00 USD
Released
Rating★ 0.0 (0)
Version1.1
Age rating4+
First seen by us
25 Sep 2026
25 Sep 2026📈Entered the top 10📈New best rank in the overall chart: #119🆕First spotted by AppInsider📦Version 1.1🆕Released on the App Store
Full timeline · 12 events
- 📈Sextant Calculator entered the top 10Top Paid · Navigation · GB
- 📈Sextant Calculator new best rank in the overall chart: #119Top Paid · All Apps · ES
- 📈Sextant Calculator entered the top 100Top Paid · Navigation · AU
- 📈Sextant Calculator charting in a new country in 2 chartsAustralia · Spain
- 📈Sextant Calculator entered the top 10Top Paid · Navigation · FR
- 📈Sextant Calculator charting in a new country in 2 chartsFrance · United Kingdom
- 📈Sextant Calculator entered the top 100Top Paid · Navigation · GB
- 📈Sextant Calculator entered the top 100Top Paid · Navigation · US
- 📈Sextant Calculator charting in a new countryUnited States
- 🆕Sextant Calculator first spotted by AppInsider#11 in Top Paid · Navigation · Italy
- 📦Sextant Calculator version 1.1- Added developer website link
- 🆕Sextant Calculator 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
#15
Navigation PaidMeasured
Sextant Calculator on the App Store
App details
App ID
6757097850
Publisher
Will Downing
On the store since
Jan 2026
Under a year
Minimum OS
iOS 15.0+
iPhone 6s and later
Devices
iPhone · iPad
Content rating
4+
Languages
1
EN
Size
2 MB
Also listed in
Education
Where Sextant Calculator's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| France | NavigationPaid | #15 |
 Australia | NavigationPaid | #17 |
Apps near Sextant Calculator on the chart
Navigation Paid, around #15.
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
4.3★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
55/100
faster than 59% 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.
What users say about Sextant Calculator
From recent reviews.
About Sextant Calculator
Sextant Calculator is the essential tool for celestial navigators, designed to simplify the arithmetic of sight reductions.
FEATURES
- Angle Calculations
Enter angles in degrees and decimal minutes (DD° MM.m') format. Add, subtract, or divide angles with a single tap. Perfect for working through sun, star, and planet sights.
- Time Calculations
Work with hours, minutes, and seconds. Add and subtract times for GMT calculations, zone time conversions, and chronometer checks. Results automatically handle overflow into days when needed.
- Averaging Made Simple
Use the divide function to quickly calculate the average of multiple sights. Enter your total, divide by the number of observations, and get your mean position.
- Purpose-Built Keypad
A custom colour-coded keypad designed specifically for navigation calculations. No fumbling with a standard calculator - every button has a purpose.
- Day and Night Modes
Switch to red night mode to preserve your dark adaptation during night watches. Essential for practical celestial navigation at sea.
- Results Tape
See your complete calculation history in the scrollable results display. Review your work and catch errors before they affect your position.
DESIGNED FOR NAVIGATORS
Whether you're a yacht skipper crossing an ocean, a merchant marine officer maintaining traditional skills, or a student learning celestial navigation, Sextant Calculator removes the tedium from sight reduction arithmetic.
No more mental arithmetic errors. No more reaching for pencil and paper. Just clean, accurate calculations every time.
Works offline - no internet connection required. Your navigation calculations work wherever you are, from mid-ocean to the most remote anchorage.
FEATURES
- Angle Calculations
Enter angles in degrees and decimal minutes (DD° MM.m') format. Add, subtract, or divide angles with a single tap. Perfect for working through sun, star, and planet sights.
- Time Calculations
Work with hours, minutes, and seconds. Add and subtract times for GMT calculations, zone time conversions, and chronometer checks. Results automatically handle overflow into days when needed.
- Averaging Made Simple
Use the divide function to quickly calculate the average of multiple sights. Enter your total, divide by the number of observations, and get your mean position.
- Purpose-Built Keypad
A custom colour-coded keypad designed specifically for navigation calculations. No fumbling with a standard calculator - every button has a purpose.
- Day and Night Modes
Switch to red night mode to preserve your dark adaptation during night watches. Essential for practical celestial navigation at sea.
- Results Tape
See your complete calculation history in the scrollable results display. Review your work and catch errors before they affect your position.
DESIGNED FOR NAVIGATORS
Whether you're a yacht skipper crossing an ocean, a merchant marine officer maintaining traditional skills, or a student learning celestial navigation, Sextant Calculator removes the tedium from sight reduction arithmetic.
No more mental arithmetic errors. No more reaching for pencil and paper. Just clean, accurate calculations every time.
Works offline - no internet connection required. Your navigation calculations work wherever you are, from mid-ocean to the most remote anchorage.
Latest updates
1.1
- Added developer website link