Star Fort Builder vs ChemBench

Assuming you mean the **last App Store version users received**, the app has changed substantially. Here’s a release-ready summary: ## Major additions - Added **“What Are Star Forts?”**, an illustrated historical introduction with links into related forts, books, and features. - Added a full **Discover** section with curated books, documentaries, museums, tours, maps, artwork, and articles. - Added a **Science** section, including an interactive cannon-trajectory simulator. - Added **Plan Your Visit** information to fort pages: - Official websites - Hotels and nearby stays - Tours and restaurants - Car-rental options for remote forts - Clear affiliate-link disclosures - Added verified **Wikipedia links for 104 of 107 forts**. ## Library and historical documents - Expanded the offline historical Library with more fortification and scientific works. - Added **Galileo’s _Two New Sciences_** and **Newton’s _Principia_**, with title-page cover images. - Added the public-domain **1638 English translation of Marolois’s _Art of Fortification_** to the project, pending its final Library wiring. - Compressed several large built-in books while preserving readability: - Earlier compression saved approximately **82 MB** - Coehoorn’s book was reduced from **18.6 MB to 5.8 MB** - Verified that every currently registered offline book opens and reports the correct page count. ## Fort information improvements - Added visible **condition badges** to fort detail pages. - Added **design traditions** to Browse cards. - Added historical photographs and related content improvements. - Added clearer notices when no reliable historical measurements have been published. - Improved the display of alternate and historical fort names. - Added museum locations to the Google Earth export. ## Fort Builder improvements - Added shared **wall-profile controls** and cross-section visualizations. - Added wall cross-sections to exported Builder PDFs. - Added an **Export Options** sheet so users can choose whether to include: - Fort diagram - Measurements - Wall profile - Improved fort geometry, measurements, and proportional rendering. - Added or improved wilderness-fort building features and walkthrough content. ## Navigation and appearance - Reorganized the home screen into the requested order: 1. What Are Star Forts? / Discover 2. Browse Forts / Fort Builder 3. Library / Science 4. Google Earth View / Settings 5. About - Updated the hamburger menu to follow the same structure. - Added optional image tiles to the home screen. - Added subtle visual polish to buttons. - Replaced the iOS/App Store icon with the aerial photograph of **Fort Bourtange**. ## iPhone reliability - Audited every custom menu, modal, drawer, and bottom sheet. - Fixed Browse and Library filter sheets so their contents cannot collapse on a real iPhone. - Previously fixed the same native-layout issue in the unit selector. - Verified all pop-ups in Expo Go on a physical iPhone. - Confirmed the photo lightbox, comparison picker, Builder export options, PDF page-jump dialog, menus, filters, and native photo action sheets work correctly. ## Release information - Visible app version is now **1.0.1**. - The new Fort Bourtange icon is configured specifically as the iOS icon used on the phone and in App Store Connect. ### Short “What’s New” version > Explore a new illustrated introduction to star forts, discover curated books, museums, tours, and documentaries, and experiment with fortification science. Fort pages now include richer historical information, travel resources, official links, and improved measurements. This release also expands the offline document library, improves PDF exports, introduces a new Fort Bourtange app icon, reorganizes navigation, and fixes menus and filter sheets on iPhone.

ChemBench turns chemistry into interactive reasoning. Adjust conditions, build structures and enter calculation evidence before checking your conclusion. Compare reagents and calculate yield; predict gas quantities and partial pressures; compose reactions and calculate signed enthalpy changes. Key readings appear after the corresponding calculations pass. EIGHT SUBJECTS, 157 LEVELS Stoichiometry, solutions and acids/bases, gases and thermochemistry, redox and electrochemistry, organic structures, equilibrium, ions and precipitation, molecules and crystals. 63 levels are free; 94 require Pro. Each subject includes Intro, Core and Brainer difficulties. PRACTICE AND EXPLORE • A free daily challenge, including rotating questions drawn from Pro levels • Courses, a review queue and subject learning records; assisted and independent solves are recorded separately • Reaction Cards explain the laws using the current problem's values • 13 quick tools, including molar mass, balancing, half-reactions, equilibrium constants, ionic coexistence and solubility curves; unlimited results and non-consumable hints • Periodic trends and comparisons, 3D crystal models, packing calculations and linked concepts • iPad split layouts and handwritten scratch work; resume unfinished problems PRO — ONE-TIME PURCHASE All 157 levels, full post-solve Reaction Card derivations, quick-tool working, configurable saved experiments, and custom problem creation with offline export. Change equations, solution conditions or gas-mixture components and check a new calculation. Pro includes every answer and all Pro features. One-time purchase. No subscription. Three sample answers per category are free to view again. Unlock Pro for all remaining answers. Existing answer-pack purchases can still be restored for their original difficulty. PRIVACY AND MODELS Problems, calculations and local records work offline. No ads or analytics SDK. Each teaching model has stated limits, such as ideal gases, concentration-based acid/base calculations at 25°C and Hess reactions with specified physical states. See the in-app model notes. This is a calculation and reasoning tool; it contains no laboratory procedures and promises no exam-score gains. Support, Privacy Policy and Terms of Use are in Settings.