# TaxTide — SED & residency day counter

> SED & residency day counter (iPhone/iPad app by Abdulrahman Alotaibi.)

- Source: https://appshunter.io/ios/app/taxtide/id6796050553 (this page in markdown: same URL + `.md`)
- Developer: [Abdulrahman Alotaibi](https://appshunter.io/developer/6789088814)
- Category: Finance, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-10-02
- Data updated: 2026-10-07
- User reviews in markdown: https://appshunter.io/ios/app/taxtide/id6796050553/reviews.md

## What is TaxTide?

A missed SED claim costs £10,000+. An accountant costs £500. TaxTide costs less than an hour of either.

TaxTide counts the days your income depends on. Built for seafarers, offshore workers and expats, it calculates your day-count position, forecasts how long you can safely stay, and stores the evidence an enquiry would ask for — entirely on your device.

WHAT IT CALCULATES
• UK Seafarers' Earnings Deduction (SED): the eligible period, the half rule and the 183-day visit limit, tracked to the day from HMRC's HS205
• 183-day residency counters with UK, Ireland and Australia presets
• US Substantial Presence Test with the exact weighted formula
• US FEIE Physical Presence Test — including the trap most mariners miss: days over international waters don't count

WHY MARINERS TRUST IT
• Safe-days forecast: "34 safe UK days remaining" — before you book the flight home
• Safe-days alerts: a heads-up 14, 7 and 1 day before any rule goes at risk
• What-if planner: sketch a trip and see every rule's before/after without touching your records
• Every number comes with its full step-by-step calculation — the audit trail HMRC would want to see
• Evidence vault for boarding passes, discharge stamps and visa pages, exported as a PDF report your accountant can file
• Offline-first and private: no account, no cloud, no tracking. Your data never leaves your device.

FREE VS PRO
The 183-day counter is free forever. TaxTide Pro adds the SED and US engines, forecasts, alerts, the planner, multi-year history, unlimited evidence and the PDF report — $29.99/year after a 7-day free trial, or $79.99 once, yours forever.

TaxTide calculates day counts for information only. It is not tax, legal or financial advice — confirm your position with a qualified adviser before filing.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| TaxTide Pro — Yearly | $29.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| TaxTide Pro — Lifetime | $79.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-10-02

No release notes.

## More apps by Abdulrahman Alotaibi

- [MindBranch](https://appshunter.io/ios/app/mindbranch/id6789088812)
- [Notecram](https://appshunter.io/ios/app/notecram/id6790194366)
- [Hitch: Offshore Rotation](https://appshunter.io/ios/app/hitch-offshore-rotation/id6794099631)
- [دفتر الجمعية — جدول الأدوار](https://appshunter.io/ios/app/id6794631675)
- [حروف: تعلم الحروف العربية](https://appshunter.io/ios/app/id6795596798)
- [KeySwap: Keyboard Shortcuts](https://appshunter.io/ios/app/keyswap-keyboard-shortcuts/id6795611528)

All apps by Abdulrahman Alotaibi: https://appshunter.io/developer/6789088814

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-07.*