Expanded autobrake calibration for the B777-300ER against Boeing's original OPT data, covering all runway surfaces, weights, temperatures and wind conditions.

Aligned the calculation core with Boeing's original OPT data source for improved landing distance accuracy.

- Performance improvements and stability enhancements

- Fixed landing weight input restriction — 6-digit weights (e.g. B777-300ER) can now be entered properly

Version 1.6 - Fixed an issue where purchased aircraft required re-restoring after app restart; purchase state is now persisted - Fixed the notch covering top content on iPhone in portrait orientation - Fixed incorrect value display when switching units - Improved purchase flow: tapping the abnormal landing toggle now automatically prompts for purchase

v1.5 Release Notes - Complete rewrite to Next.js architecture with significant performance improvements - Global unit switching: Weight KG↔LB, Wind KT↔M/S, Temperature °C↔°F, Altitude FT↔M, Distance M↔FT - All inputs, outputs, correction breakdowns, and runway occupancy reflect the selected unit system - Calculation engine isolated from UI layer — core algorithm unchanged, identical precision (572 regression tests passed) - Winglet toggle now uses native switch component, visually consistent with Normal/Abnormal switch - Optimized offline calculation for faster response

⏺ Landing Distance Calculator V1.3 Release Notes Architecture - Removed server dependency — all calculations now run fully offline with zero network requirement Bug Fixes - Fixed an issue where IAP prices occasionally displayed as -- by implementing a three-layer price injection safeguard Under the Hood - Changed Info.plist version string to use build setting variable, streamlining future version bumps

What's New in Version 1.2 This update fully rebuilds the aircraft unlock purchase system, fixes core payment display bugs, optimizes iPad full-screen layout, and polishes cross-device UI visuals. Reworked In-App Purchase System Real-time live pricing synced directly from StoreKit 2. The placeholder "--" no longer appears on unlock panels, the official localized price loads and displays correctly on launch. Aircraft-specific purchase popups: Tapping abnormal mode on a locked aircraft only shows the matching one-time unlock item for that plane, removing redundant aircraft list clutter. Streamlined native purchase flow: System payment alerts display official product names and exact local prices, with one-tap Buy, Restore Purchases, and Cancel controls. Optimized error handling: Separates user-cancelled transactions from genuine payment failures to prevent misleading "Purchase Failed" popups. Fixed unlock permission bug: Successfully completed purchases instantly unlock the abnormal landing mode for the selected aircraft permanently. UI & Layout Improvements Full universal iPad adaptation: The app runs completely full-screen on all iPad models with no blank side margins. Notch & Dynamic Island compatible header layout, no text hidden behind device hardware cutouts. Restyled aircraft configuration toggles to match the app’s unified blue color theme. Refined light and dark mode surface, divider and overlay colors for consistent visual experience across all devices. Under the Hood Fixes Resolved price loading race condition: Price data is injected before the web app initializes, eliminating missing price placeholders on startup. Upgraded to StoreKit 2 with modern Swift async/await logic, full transaction validation and restore purchase support. Complete local StoreKit test configuration covering all aircraft unlock product IDs for accurate sandbox testing. Version bumped to 1.2 (Build 11). This app provides free standard landing calculation functions. Advanced abnormal landing mode for each aircraft requires a one-time single purchase to unlock permanent access. Purchases are tied to your Apple ID and can be restored on any device via the Restore Purchases button. If this aviation calculation tool helps your workflow, please consider leaving a review on the App Store.

- Added in-app purchases: unlock abnormal landing calculation per aircraft type - Fixed purchase flow, now using Apple StoreKit for payments - Normal landing calculation remains free forever