Create iOS User Guide for AnkiMobile

Added a comprehensive user guide for the AnkiMobile app on iOS, detailing pricing, installation, and usage instructions.

Author: SKOHscripts

README_IOS.md

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+# 📱 iOS / iPhone User Guide
+
+<strong>⚠️ Why AnkiMobile is a Paid App</strong>
+
+The **AnkiMobile** app for iOS (iPhone/iPad) costs **$29.99** (price subject to change). This fee supports:
+
+*   Continuous development and maintenance of the Anki ecosystem across **all platforms**.
+*   App store costs (such as Apple Developer fees).
+*   Compensation for the lead developer, Damien Elmes, who provides the desktop (Windows/macOS/Linux) and web (AnkiWeb) versions **for free**.
+
+This business model ensures the sustainability of a high-quality, open-source project.  
+**Purchasing the app remains the best way to support the project and get an optimal, offline review experience on iOS.**
+
+## 🆓 Using Anki for Free on iPhone/iPad via Safari
+
+You can use **AnkiWeb** through the **Safari** browser to review this deck for free on iOS.
+
+### **Prerequisites**
+1.  A free **[AnkiWeb](https://ankiweb.net/account/register)** account.
+2.  The **Anki** app installed on your **computer** (Windows, macOS, Linux) for the initial deck import.
+
+### **📥 Installation & Sync Procedure**
+
+| Step | Action | Details |
+| :--- | :--- | :--- |
+| **1.** | **Import the deck to your computer** | 1. Download the `.apkg` file from the [main project page](https://github.com/SKOHscripts/Optimized-Chess-Puzzles) or via [AnkiWeb](https://ankiweb.net/shared/info/894523279).<br>2. Open **Anki** on your computer.<br>3. Go to `File` → `Import...` (or double-click the file).<br>4. Select the downloaded file. Your cards will be added to your local collection. |
+| **2.** | **Sync with AnkiWeb** | 1. In Anki (on your computer), click the **sync button** (two circular arrows icon) in the top-right corner.<br>2. Log in with your AnkiWeb account.<br>3. Let the sync complete. The deck is now uploaded to AnkiWeb's servers. |
+| **3.** | **Access cards on iPhone/iPad** | 1. Open **Safari** on your iPhone/iPad.<br>2. Go to [https://ankiweb.net/](https://ankiweb.net/) and log in.<br>3. Your collection, including the **"Optimized Chess Puzzles"** deck, is now accessible.<br>4. You can review directly in the browser. The interface is mobile-optimized. |
+
+### **✅ Advantages & Limitations of This Method**
+
+| Advantage | Limitation |
+| :--- | :--- |
+| **Free.** | Requires an **active internet connection** to review (except for advanced browser offline mode usage). |
+| No app installation needed on iOS. | User experience is **less fluid** and offers **fewer features** than the native AnkiMobile app. |
+| Perfect sync with your computer collection. | Some advanced features (complex scripts) may not work exactly the same way. |
+
+### **🔧 Troubleshooting & Resources**
+
+*   **Cards don't appear on AnkiWeb**: Verify the sync from your computer completed without errors.
+*   **Chessboard display issues on mobile**: Refer to [issue #10](https://github.com/SKOHscripts/Optimized-Chess-Puzzles/issues/10) where fixes were discussed.
+*   **Official AnkiWeb documentation**: [https://docs.ankiweb.net/](https://docs.ankiweb.net/).
+
+---
+
+**💡 Tip**: For an optimal, fluid, and offline review experience on iOS, purchasing the **AnkiMobile** app is recommended. This Safari method is an excellent **free** alternative to test the deck or for occasional use.