NEWBL KataGo vs OneSolve Go
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NEWBL KataGo
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NEWBL KataGo lets you play baduk matches against AI and review game records with ease. Key Features • AI baduk matches • Kifu viewing and replay • Handicap, komi, and stone color settings • Adjustable AI thinking time Before each match, you can quickly set handicap, komi, your stone color, and the AI thinking speed. After playing, you can open and review kifu to study the flow of the game. Whether you want casual AI matches or a simple way to review game records, NEWBL KataGo helps you enjoy and study baduk in one place. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
OneSolve Go
This app provides an offline Go engine and learning tools for players of all levels. It features life-and-death problems, beginner lessons, and game analysis. The app is optimized for Apple devices and offers optional cloud features for enhanced play and review.
- Offline KataGo engine
- Life-and-death problems
- Beginner lessons
- Game analysis and review
- Rank assessment
- Optimized for Apple Silicon
- Cloud play and review (optional)
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OneSolve Go runs KataGo directly on your iPhone or iPad. Models and problem packs download on demand from the App Store when first needed. Once downloaded, play, problems and local review work offline. Optional online features are also available. CLOUD PLAY AND REVIEW Choose on-device or cloud play in Custom Game. Live cloud play requires an active paid membership and costs 2 credits per AI position analysis. Full-game cloud review costs 200 credits per game. Cloud features send the selected position or game record to our service. The app shows preparation, reconnection and completion status; reviews run asynchronously. Credits are available through in-app purchases, with prices shown before purchase. Cloud review stores the submitted original game record and analysis report so the same account can retrieve them across devices. Downloaded reports are available offline, and reading existing reports does not spend credits again. Older jobs without a retained original game record can only display the analysis results still available. FROM 20 KYU TO 9 DAN+ · The kyu levels are not a weakened engine. They use a network trained on human games — it misses things, gets greedy and plays a loose endgame, like a person rather than a machine playing badly on purpose · The dan levels are set by KataGo's search depth, one rung at a time · 9x9, 13x13 and 19x19, with handicap 7,468 LIFE-AND-DEATH PROBLEMS Life and death, capture, tesuji and endgame, graded by type and five difficulty levels, all solvable offline. 33 BEGINNER LESSONS Ordered after the British Go Association's teaching guide: capturing first, boards up to 9x9 to begin with, ko last. The graduation test is beating KataGo on 9x9 with a 4-stone handicap. REVIEW AND RANK ASSESSMENT Let KataGo analyse a finished game move by move: it draws the win-rate curve and picks out the moves that cost you most. The rank assessment estimates your strength from move quality, not from the result. TUNED FOR APPLE SILICON · Prefers the Neural Engine — same strength, less battery · Low power / normal / full speed, with automatic downgrade when the device heats up · SGF import and export; games sync across your devices through iCloud ONLINE FEATURES AND PRIVACY Share a selected game as a revocable web link. AI explanations use your own configured provider and API key, sending your questions and relevant game context to that provider. Keys stay in the local Keychain; provider charges may apply. No manual registration or sign-in is required. Membership and rewards services process random device/account identifiers, purchase receipts and learning-task progress. After privacy consent, model sessions report device/OS details, CPU/memory use, thermal and battery status, and disk/network counters. Apple provides payments and iCloud synchronization. There are no ads or cross-app advertising tracking. — Membership & Subscription — · Yearly Membership: auto-renewable subscription, 1 year; price shown in-app for your storefront (CNY 38/year in China). Cancel anytime in your App Store account settings. · Lifetime Membership: one-time purchase, not a subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://tommyeth.github.io/yijie-weiqi/privacy.html
Screenshots
Verdict
The clearest difference is update cadence: NEWBL KataGo at every 3 days against OneSolve Go's fortnightly. NEWBL KataGo also leads on iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. NEWBL KataGo sells 3 in-app purchases, starting at $0.99 per month and OneSolve Go sells 5 in-app purchases, starting at $4.99 per year. Whichever you choose, the download price is not the number that matters.
NEWBL KataGo ships an update every 3 days, OneSolve Go fortnightly. The most recent releases landed on October 29, 2026 and November 10, 2026 respectively.
| Parameter | NEWBL KataGo | OneSolve Go |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 37 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | Newbl | Suzhou Vector16 Tech Ltd |
In-app purchases
NEWBL KataGo
- Monthly Unlimited$0.991 Month
- AI Coach$2.991 Month
- Annual Unlimited$4.991 Year
OneSolve Go
- Yearly Member$4.991 Year
- 1,200 AI Analysis Credits$0.99
- 6,666 AI Analysis Credits$3.99
- Lifetime Member$7.99
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- 22,990 AI Analysis Credits$14.99









