SakataGo vs GoReview

SakataGo – Play Go offline with KataGo Bring one of the world’s strongest Go AI engines, KataGo, directly to your iPhone or iPad — fully offline, no internet or servers required. Play, analyze, and improve your Go game anywhere, against AI opponents ranging from advanced beginner to professional and superhuman levels. Key Highlights: - Fully offline KataGo AI – play anywhere, anytime! - Adjustable AI strength: from 10‑kyu to full KataGo strength - Realistic board and stones: Hyuga Kaya boards with slate and clam shell stones - Game analysis and hints: review moves, estimate territory, and check win rates - SGF support: open, share, and store Go game files easily Please note: The hardware of the iPad 7th generation from 2019/2020 (A10 Fusion chip) is not compatible with the human imitation modes in SakataGo. The app will have a weaker performance on these old devices. Play & Learn SakataGo combines the KataGo engine with powerful analysis tools: - Step through games forward and backward, get AI hints, and see territory and win rate estimates - See color indications for move quality when reviewing games (green, yellow, orange, red, and purple according to point loss) - Store up to twenty positions in a review stack and cycle through them - Continue playing from any review position, keeping the reviewed game stored or in the clipboard - Choose between human imitation levels (10‑kyu to 9‑dan amateur) or full KataGo strength, based on current neural network models (2025/2026) - Switch opponent strength, AI player and think times during a game to test different reactions Main User Settings: - AI Player (white, black, none, or both (self-play)) - Board size (9 x 9, 13 x 13, 19 x 19) - Handicap and Komi adjustments - Choice of Japanese or Chinese rules - AI think time and hint calculation time - Optional on-screen win rate and score display - Select between two KataGo neural net models (small and large) - Switch sound on or off Realistic Design - Enjoy a beautiful, natural board and stone setup, with slight imperfections for a realistic feel. - SakataGo’s easy-to-use interface focuses on essentials so you can focus on playing and improving your game. Game Sharing & SGF Support - Open SGF files from the Files app, from the clipboard or via Share Extension - Share games or positions via clipboard or compatible apps, or save to file - Note: variants in SGF files are not supported; SakataGo’s main focus is offline AI gameplay and review. However, by using SakataGo's review stack and clipboard functionalities, you can easily play out variants and return to former positions. Why "SakataGo"? The app name was chosen both in honor of Eio Sakata (坂田 栄男, 1920-2010) and KataGo (*2019), combining the names of one of the leading professionals of the 20th century with today's leading Go playing AI.

GoReview is the iPhone and iPad Go reviewer that turns every game you play into your personal learning library — local-first, on-device KataGo, no subscription. YOUR LIBRARY, EVERY SOURCE • OGS: sign in once and your finished games sync automatically. • Other servers: drop SGF or Tygem .gib files into the GoReview folder in iCloud Drive — they appear in your library on the next launch. • Batch import: select multiple SGF files at once, with per-file progress and a result summary. Duplicate games are skipped automatically. • Face-to-face: play someone next to you on another device over a local Wi-Fi peer-to-peer connection. No internet needed. • Same device: play the AI at 7 strength levels, or hand the iPad back and forth between two players. • iCloud backup and restore: automatically back up games and settings, then restore or merge manually on another device. Includes overwrite confirmation and protection against replacing a larger library; not two-way sync. REVIEW BECOMES PRACTICE • On-device KataGo reviews your full game in seconds — top-3 candidate moves on the board, win-rate chart, territory overlay (Benson), move-by-move commentary written into the SGF when you export. Mistake detection adapts to the rank you set—kyu players see the big blunders, while dan players catch finer slips. Cancel analysis at any time; completed moves stay saved, and you can resume from the checkpoint with an estimated time remaining. • One tap turns each mistake into a practice problem in your personal library. The AI prefills a solution line and likely failure variations. • Author your own twist: replace the suggested move, write why it works in your own words, add the failure paths you actually want to remember. • Solve as multi-move sequences with SM-2 spaced repetition — not single-guess flash cards. • Interactive review: tap the board to branch a variation, the AI re-analyzes, step back and the original game resumes. No modals, no menus. • 9×9, 13×13, 19×19. Japanese, Chinese, Korean, New Zealand rules. • Pinch to zoom, long-press to preview, board sounds and haptics. • Localized in English, 繁體中文, 简体中文, 日本語, and 한국어. TEN PROBLEMS A DAY, A REASON TO COME BACK • Daily practice: due mistake reviews and rank-matched tsumego form one fixed set. Finish it and you're done—not an endless queue. • Streaks, badges, and reminders: choose a time; GoReview nudges you when your streak is at risk, and stays quiet once you're done for the day. • Progress dashboard: streak calendar, 30-day accuracy, total problems solved, and the next 7 days of due reviews—see yourself improve. • 4,000+ OGS collections: browse offline and filter by rank. Download a collection into daily practice; finished for today but want more? Keep solving from the same collection. PRICING GoReview is free. The free tier includes 1,000 saved games and unlimited AI analysis — enough to make this your everyday review tool. Premium is a one-time purchase that lifts the library cap. No subscription, ever. Family Sharing supported. FOR WHO Whether you're a kyu player trying to break through to dan, a single-digit kyu who wants the bot to actually punish your overplays, or a serious amateur who just wants the strongest pocket review tool — GoReview is built for you. Built by a Go player who got tired of every other reviewer either being a web app, a paid subscription, or both. Free: 1,000 saved games and 7 days of progress history. Premium: 30 days of progress history and lifetime totals for every category. --- SUPPORT https://gameboardlab.com/goreview/support PRIVACY POLICY https://gameboardlab.com/privacy