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Offline bridge toolbox for maritime professionals: voyage planning, draft survey, stability, tank and cargo tools, celestial navigation, and COLREG/IALA references.
Hi Product Hunt! I built CaptainCalc for the kind of bridge work where the internet is weak, time is short, and calculations still need to be repeatable.
It brings voyage planning, draft survey, stability checks, tank/cargo tools, celestial navigation, and maritime references into one Android toolbox. The core calculations run locally and are covered by regression tests, so the app is useful at sea, in training, or during operational checks.
It is decision-support software, not a replacement for approved onboard systems or official stability booklets. I would love feedback from mariners, students, and anyone building serious offline tools for field work.
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About CaptainCalc on Product Hunt
“Offline maritime calculators for ship operations”
CaptainCalc was submitted on Product Hunt and earned 4 upvotes and 1 comments, placing #156 on the daily leaderboard. Offline bridge toolbox for maritime professionals: voyage planning, draft survey, stability, tank and cargo tools, celestial navigation, and COLREG/IALA references.
CaptainCalc was featured in Android (57.3k followers), Productivity (655.7k followers) and Vercel Day (20 followers) on Product Hunt. Together, these topics include over 188.7k products, making this a competitive space to launch in.
Who hunted CaptainCalc?
CaptainCalc was hunted by Ender Soyuince. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Ender Soyuince