Seafarers Tax Calculator Downloads & RevenueSeafarers Tax Calculator · App Store
Not in any tracked top chart right now.
Updated 8 Nov 2026 · rankings refresh through the day
Developerwilliam cardno
CategoryFinance
PriceFree
Released
Rating★ 3.3 (3)
Version1.0.129
Age rating4+
First seen by us
26 Sep 2026
26 Sep 2026Seafarers Tax Calculator update history & changes
Last change · 4 events since 10 Mar 2026Full timeline ↓📈Dropped out of every chart we track🆕First spotted by AppInsider📦Version 1.0.129🆕Released on the App Store
Full timeline · 4 events
- 📈Seafarers Tax Calculator dropped out of every chart we trackLast seen 3 Oct
- 🆕Seafarers Tax Calculator first spotted by AppInsider#88 in Top Grossing · Finance · United Kingdom
- 📦Seafarers Tax Calculator version 1.0.129Fixed an issue that could prevent documents from opening on some iPhones
improved document handling and overall stability
General bug fixes and performance improvements - 🆕Seafarers Tax 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
3.3 ★
3 ratings
Measured
Seafarers Tax Calculator on the App Store
App details
App ID
6758364410
Publisher
william cardno
On the store since
Mar 2026
Under a year
Minimum OS
iOS 15.1+
iPhone 6s and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
1
EN
Size
33 MB
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
3.3 ★
3 ratings
Measured
Ratings
3
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
under 1
4-week average
Lifetime rating
3.3★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
20/100
faster than 0% of Finance 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 Seafarers Tax Calculator
Seafarers Tax Calculator – Know Your SED Position
Know exactly where you stand with your Seafarers Earnings Deduction (SED) — before it’s too late.
Track your voyages, calculate your qualifying days, and see your Days in Hand (DIH) and fail date in real time.
Built offshore, for offshore workers.
Why this matters
Most seafarers don’t realise they’re short on days until the end of the tax year.
By then… it’s too late.
This app shows you:
How many qualifying days you have
How close you are to failing
The exact date your claim could fall short
No spreadsheets. No guesswork.
Key Features
SED Tracking Made Simple
Log voyages and holidays in seconds
Automatic qualifying day calculation
Works fully offline (perfect offshore)
Days in Hand (DIH)
See how much buffer you have
Know instantly if you’re close to the edge
Fail Date Prediction
See the exact date your claim could fail
Stay ahead instead of reacting too late
HMRC-Ready Records
Keep a clear log of your trips
Export CSV and PDF reports for accountants or HMRC
Smart Reminders
Get alerts before your fail date
Stay in control of your claim all year round
Document Storage
Store discharge books, payslips, and records
Keep everything in one place when it matters
Built for Offshore Reality
Works without signal or WiFi
No login required
No complicated setup
Designed for real offshore rotations
Who it’s for
Offshore workers
Seafarers claiming SED
Wind, oil & gas, marine crews
Anyone needing to track qualifying days accurately
Simple but powerful
This isn’t about features.
It’s about one thing:
Knowing your position before you submit your claim.
Premium Features
Upgrade to unlock:
Days in Hand (DIH)
Fail Date tracking
Export reports
Smart alerts
Extra document storage
Final word
If this app helps you avoid losing your SED claim…
it’s already paid for itself.
Disclaimer
The app is designed as a practical tracking tool and does not replace professional tax advice.
Terms of Use (EULA)
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Know exactly where you stand with your Seafarers Earnings Deduction (SED) — before it’s too late.
Track your voyages, calculate your qualifying days, and see your Days in Hand (DIH) and fail date in real time.
Built offshore, for offshore workers.
Why this matters
Most seafarers don’t realise they’re short on days until the end of the tax year.
By then… it’s too late.
This app shows you:
How many qualifying days you have
How close you are to failing
The exact date your claim could fall short
No spreadsheets. No guesswork.
Key Features
SED Tracking Made Simple
Log voyages and holidays in seconds
Automatic qualifying day calculation
Works fully offline (perfect offshore)
Days in Hand (DIH)
See how much buffer you have
Know instantly if you’re close to the edge
Fail Date Prediction
See the exact date your claim could fail
Stay ahead instead of reacting too late
HMRC-Ready Records
Keep a clear log of your trips
Export CSV and PDF reports for accountants or HMRC
Smart Reminders
Get alerts before your fail date
Stay in control of your claim all year round
Document Storage
Store discharge books, payslips, and records
Keep everything in one place when it matters
Built for Offshore Reality
Works without signal or WiFi
No login required
No complicated setup
Designed for real offshore rotations
Who it’s for
Offshore workers
Seafarers claiming SED
Wind, oil & gas, marine crews
Anyone needing to track qualifying days accurately
Simple but powerful
This isn’t about features.
It’s about one thing:
Knowing your position before you submit your claim.
Premium Features
Upgrade to unlock:
Days in Hand (DIH)
Fail Date tracking
Export reports
Smart alerts
Extra document storage
Final word
If this app helps you avoid losing your SED claim…
it’s already paid for itself.
Disclaimer
The app is designed as a practical tracking tool and does not replace professional tax advice.
Terms of Use (EULA)
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Latest updates
1.0.129
Fixed an issue that could prevent documents from opening on some iPhones
improved document handling and overall stability
General bug fixes and performance improvements