# Pilots SG — Calculator for pilots in SG

> Singapore pilot calculator for flight duty and rating expiry dates. (iPhone/iPad app by Pe Hon Ong.)

- Source: https://appshunter.io/ios/app/pilots-sg/id1509881444 (this page in markdown: same URL + `.md`)
- Developer: [Pe Hon Ong](https://appshunter.io/developer/916093566)
- Category: Productivity, Reference
- Price: $0.99 (on sale, was $1.99)
- Rating: 4.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.4 · 1 MB
- Languages: English
- Released: 2020-04-27
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/pilots-sg/id1509881444/reviews.md

## What is Pilots SG?

Pilots SG is lightweight calculator for pilots in Singapore. The app is currently able to calculate Flight Duty Period (FDP) and BC/IR Expiry dates, with plans to further expand the app's offerings. 

Flight Duty Period. Effortlessly calculate your 2 crew compliment FDP. The formula takes inputs that includes the following

1. Reporting time, 
2. Total sectors to be flown, 
3. Whether you are acclimated to local time, and 
4. The length of the single sector (in the case of a one sector duty)

Base Check or Aircraft Rating, Instrument Rating expiry dates. Effortless calculate your Aircraft Rating (or Base Check) and Instrument expiry dates by keying in your two preceding Base Check dates. Formulas take into account the 4 months apart rule.

All calculations are calculated on the device, meaning you don't need an internet connection to use the app.

All formulas are based on Singapore's civil aviation's regulations. While every effort is made to provide accurate and complete information and calculations, we cannot guarantee that there will be no errors. We make no claims, promises or guarantees about the accuracy, completeness or adequacy of the calculations on this app and expressly disclaim liability for errors and omissions in this app.

## Key features

- Flight Duty Period (FDP) calculation
- BC/IR Expiry date calculation
- Offline functionality
- Singapore aviation regulations compliance
- Input reporting time, sectors, acclimation, and sector length

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/pilots-sg/id1509881444/reviews.md

### 4/5 — Useful for SG based pilots

*2020-05-01*

Useful app for calculating those tricky base check dates. 

Would give it 5 stars if you could so kindly add FTL for 3 and 4 crew operations. 

Thank you!

**Developer response:** Thanks for your review. FTL for 3 and 4 crew operations is on the roadmap! Look out for that! Thanks for your support =)

## Frequently asked questions about Pilots SG

### What is Pilots SG?

Pilots SG is a calculator designed for pilots in Singapore. It helps calculate Flight Duty Period (FDP) and Base Check/Instrument Rating (BC/IR) expiry dates based on Singapore's civil aviation regulations.

### How does Pilots SG calculate Flight Duty Period?

The app takes into account your reporting time, the total number of sectors to be flown, whether you are acclimated to local time, and the length of a single sector if it's a one-sector duty.

### How does Pilots SG calculate BC/IR Expiry dates?

You can calculate your Aircraft Rating (or Base Check) and Instrument expiry dates by inputting your two preceding Base Check dates. The formulas consider the rule of being at least 4 months apart.

### Does Pilots SG require an internet connection?

No, all calculations are performed on the device, meaning you do not need an internet connection to use the app.

### Is Pilots SG accurate?

While every effort is made to ensure accuracy, the app disclaims liability for any errors or omissions. It is recommended to cross-reference calculations with official sources.

### What devices is Pilots SG available on?

Pilots SG is available for iPhone, iPad, and iPod devices.

### How often is Pilots SG updated?

The latest version, 1.0.2, was released on August 7, 2020. Future updates are planned to expand the app's offerings.

### What is the price of Pilots SG?

Pilots SG is a paid application, available for $0.99.

## Version history (last 3 releases)

### 1.0.2 — 2020-08-07

Minor text changes to align with CAAS Air Navigation 121 S 212/2020 wef 01/04/2020

### 1.0.1 — 2020-05-01

Fixed bug (wow that's fast!?!) where the second date in the BC/IR page constantly resets to today.

### 1.0 — 2020-04-27

No release notes.

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## More apps by Pe Hon Ong

- [SimplyLog – Pilot Logbook](https://appshunter.io/ios/app/simplylog-pilot-logbook/id1517000406)

All apps by Pe Hon Ong: https://appshunter.io/developer/916093566

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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 2026-06-10.*