Navigame Buoys
by Iver C. Weilbach & Co. A/S
- Utilities
- Paid
- Zombie
- Rating
- 3.3
- 12 ratings
- Top 77%among 59 Utilities apps
- Last update
- Aug 21, 2020
- Version 1.2.0
- Size
- 275 MB
- Category
- Utilities
- Tracked since
- Oct 10, 2026
Estimated revenue
A model estimate with a likely range, not a reported figure.
No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.
How this estimate is made
Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.
Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.
Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.
Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.
Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.
Full methodScreenshots
As shown on the App Store listing.
About this app
Text from the App Store listing.
Navigame Buoys is an efficient and amusing way to test your skills in recognizing buoys – both for training new sailors as well as keeping the experienced sailors up-to-date.
The test is useful for all types of maritime educations, both merchant and leisure.
Navigame Buoys is complied with IALA (Maritime Buoyage System) therefore the user must choose if they want to do the test in according to region A or region B.
The test is built on the most efficient learning method. Buoys are divided into four levels with increasing in difficulty as you progress. Each level introduces new types of buoys and contains also a repetition of already shown types.
Level 1 includes:
Starboard Hand Lateral buoys
Port Hand Lateral buoys
Safe Water Mark
Level 2 includes:
Cardinal Buoys
Level 3 includes:
Special Marks
Isolated Danger Mark
Level 4 includes:
Preferred Channel Mark, starboard hand
Preferred Channel Mark, port hand
Emergency Wreck Buoy
Every level includes 10 tasks - each with 3 questions.
To pass a level you have to answer at least 24 questions correctly
The final test includes 20 tasks with 3 questions each.
To pass the final test you must answer correctly on at least 54 questions.
Questions on:
- Name of buoy type
- Appearance
- Light characteristics
- Flashing lights
- Light Reflectors
- Application
Three types of tasks in The Test:
A. You will be given the name of the buoy and must answer correct on:
1. Appearance
2. Flashing lights
3. Light characteristics
B. You will be given the appearance of a buoy and must answer correct on:
1. Flashing lights
2. Type/name
3. Light reflectors
C. You will be given the flashing light of a buoy and must answer correct on:
1. Type/name
2. Appearance
3. Application
Buy and use the index during day or night sailing to verify a buoy. Scroll through and touch the current buoy to see relevant information: Type, appearance, light characteristics, abbreviation in the sea chart, light reflectors and use. Also enclosed is advise on how to pass the buoy correctly.
The Index is a powerful support tool for new sailors and a useful instrument even for experienced sailors. The index is complied with IALA (Maritime Buoyage System).
Navigame Buoys is produced by Iver C. Weilbach & Co. A/S, Copenhagen.
If you want to know more about our company: www.weilbach.com
What’s new
Release notes for the latest version, as written by the developer.
UI updated to support new iPhone and iPad.
Language related issue fixes.
Rank history
Daily position in the Denmark charts. #1 is at the top.
- Best rank
- #1
- Current rank
- #1
- Days charting
- 7 of 7
On the charts today
Small & simple score
How realistic it is for a small team to build something like this.
53/100
Not flagged as small & simple
- Developer size40% · 25
Developer: 3 apps on the charts
- Audience size– · 20
No data, weight redistributed
- App size25% · 10
Size: 275 MB
- Price model100% · 15
Price model: paid
- Demand proof50% · 30
Best rank #1, 1 country
An indicator, not a fact. We can't see team size. Calculated Oct 25, 2026 · method i2
How the score worksVersion history
- 1.2.0LatestReleased Aug 21, 2020