PGN Trainer vs Aritmo

As an adult improver who reached a 2100+ rating in my 50s, I founded PGN Trainer to solve my own problem: I needed a better way to truly master my openings without relying on expensive, proprietary courses. By building and training my custom repertoire with these exact tools, I shattered my plateau and raised my rating by over 300 points. Whether you are a young club player crafting your first set of openings or a veteran organizing deep theoretical preparation, this is the all-in-one tool designed to help you do the exact same thing. BUILD & ORGANIZE YOUR LIBRARY • Create Your Way: Import your own PGN files, analyze and build a repertoire from the ground up, or download from our rich built-in library of effective, popular openings. • Tailored to You: Find downloadable studies that perfectly match your playing level (Intermediate, Advanced, or Master) and your personal style (whether you prefer Dominating attacks or Solid/Defensive setups). • Total Control: Reorganize your library effortlessly. Separate files, merge repertoires together, or edit and expand your lines directly using deep engine analysis. ADVANCED SEARCH & DISCOVERY • Find Any Line: Search your entire library by specific move sequences, official ECO names (e.g., "Sicilian"), or ECO numbers (e.g., "B90"). • Spotty Search: Use wildcard "spotty" moves to skip moves in your search and easily find transpositions. • Position Matching: Instantly search your custom repertoire for matching positions while you are analyzing your actual, real-world games. STUDY, TRAIN, AND ANALYZE • Three Seamless Modes: Effortlessly surf between Studying the theory, Training your memory, and Analyzing with the engine—all in one fluid experience to enhance your learning. • Spaced Repetition: Train your customized lines using smart spaced repetitions, ensuring you focus your time exactly on the variations you struggle to remember. • Active Learning: Play your prepared responses directly against the engine so you are fully prepared when you sit down at the board. GENEROUS FREE TIER & CLOUD SYNC • Truly Free for Most Players: Enjoy access to intermediate libraries, full study modes, and active training completely for free. We only require a premium upgrade for massive, master-level studies containing more than 2,000 total moves. • iCloud Sync: Your complete opening library syncs automatically across your iPhone, iPad, and Mac. Build a study on your Mac, and train it on your iPhone during your commute! Stop renting your chess knowledge. Build your ultimate repertoire, train your exact lines, and step up to the board with total confidence. Download PGN Trainer today! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://chesspgntrainer.smartworldinnovations.com/privacy-policy

Train your brain to calculate faster with short, structured mental math lessons. Aritmo teaches rapid calculation techniques through focused lessons, interactive practice, and gamified challenges. Instead of memorizing random tricks, you learn step-by-step methods for solving arithmetic problems more efficiently in your head. LEARN MENTAL MATH STEP BY STEP Aritmo is designed to help you build real calculation skills through progressive courses and practice exercises. In this first version, Aritmo includes two main learning paths: • Basic Multiplication Learn the Trachtenberg method for rapid multiplication with numbers from 2 to 11. This course introduces the core patterns and rules used to multiply faster mentally. • General Multiplication Learn a broader multiplication method for solving more flexible multiplication problems. This course is available with an active subscription. The app clearly identifies which content is included and which content requires a subscription before purchase. PRACTICE WITH SHORT DAILY LESSONS Each concept is broken into simple lessons that can be completed in a few minutes. You can learn a method, practice it immediately, and repeat challenges to build speed and confidence over time. Aritmo helps you practice: • Fast multiplication techniques • Mental arithmetic without a calculator • Number patterns that simplify calculations • Focused repetition for stronger recall • Progressive exercises that increase in difficulty GAMIFIED BRAIN TRAINING Aritmo turns mental math practice into a structured daily challenge. You can: • Progress through lessons • Complete practice exercises • Build learning streaks • Track your progress • Improve your speed through repetition WHO IS ARITMO FOR? Aritmo is useful for: • Students who want stronger arithmetic skills • Adults who want to sharpen their mental calculation ability • Puzzle and brain-training enthusiasts • Anyone curious about rapid mental math methods • Learners who want structured practice instead of random math tricks SUBSCRIPTION INFORMATION Aritmo offers optional in-app purchases. The Basic Multiplication course is available in the app. The General Multiplication course requires an active subscription. Subscription availability and terms are shown clearly in the app before purchase and are managed through your Apple ID. You can use Aritmo to start learning mental multiplication techniques and upgrade only if you want access to the additional subscription course. Start training your mental math skills with Aritmo. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://melbot.com.br/privacy.html