# FlightDuty vs Simple FTL Calculator

The clearest difference is update cadence: FlightDuty at monthly against Simple FTL Calculator's every 4 months. FlightDuty also leads on iOS requirement (14.7 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.

FlightDuty costs $3.99 and Simple FTL Calculator $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

FlightDuty ships an update monthly, Simple FTL Calculator every 4 months. The most recent releases landed on October 2, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | FlightDuty | Simple FTL Calculator |
| --- | --- | --- |
| Price | $3.99 | $3.99 |
| Rating | **[3.8 (5 ratings)](https://appshunter.io/ios/app/flightduty/id1487091225/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Paid | — |
| Size | 22 MB | 50 MB |
| Requires iOS | **14.7** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mohammed Alotaibi](https://appshunter.io/developer/455007789) | [Yiu Leung Sze](https://appshunter.io/developer/1816049574) |

## What reviewers say

### FlightDuty

[App page](https://appshunter.io/ios/app/flightduty/id1487091225)

Calculate flight duty period limits for augmented and un-augmented crews. This utility app helps pilots adhere to aviation regulations by providing accurate duty period calculations.

**Highlights:** Calculate duty limits, Augmented crew support, Un-augmented crew support, Aviation regulation adherence

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple FTL Calculator

[App page](https://appshunter.io/ios/app/simple-ftl-calculator/id6746280039)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is FlightDuty free?

FlightDuty costs $3.99, with no in-app purchases.

### Is Simple FTL Calculator free?

Simple FTL Calculator costs $3.99, with no in-app purchases.

### Do FlightDuty or Simple FTL Calculator have ads?

Neither FlightDuty nor Simple FTL Calculator shows ads.

### Which is updated more often, FlightDuty or Simple FTL Calculator?

FlightDuty ships an update monthly, and Simple FTL Calculator every 4 months. Most recently, FlightDuty was updated on October 2, 2026 and Simple FTL Calculator on October 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*