Comparison

Revello (オセロ) vs CrazyStone DeepLearning

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Revello (オセロ)

Experience a classic board game with a modern interface. Play against AI opponents of varying difficulty, learn strategies with move highlighting, and challenge friends or random players online. Features a beginner tutorial and achievements.

Highlights
  • Five AI difficulty levels
  • Display and highlight best moves
  • Online multiplayer with random opponents
  • Challenge friends directly
  • Game Center achievements and leaderboard
  • Beginner tutorial
  • HD Retina display support
Features
Read full description

If you like to play Reversi, chess or mill, then you will enjoy this board game with its next generation interface design and a great features! • Computer AI with five levels • Display possible moves • Highlight the best move against the computer to learn strategies • Challenge random opponents online or your friends directly • Game Center achievements and leaderboard • Tutorial for beginners • HD for Apple Retina displays • Designed for iPhone/iPod and iPad • Appealing UI with animations and sound effects APPEALING DESIGN Revello brings you the game in a clean and attractive way with a fast and enjoyable user experience. Revello is designed for iPhone/iPod and iPad with HD for all retina displays. TURN-BASED MULTIPLAYER Searching for random opponents online works in background and you can play as many games as you want to the same time! You also can challenge your Game Center friends directly. Discover the best of turn-based playing and continue the game with your turn any time. STRATEGY COACH Your success to win depends on your skills, tactics and strategy. Highlight the best move against the computer to learn how the champion would play. Develop your strategies to defeat them all! The intuitive interface makes the game easy to pickup. COMPUTER AI You have five computer opponents and the Champions Mode is very powerful, but it’s responding fast without making long calculations for the next move! Check out the web edition revello.io and and experience the sophisticated AI for yourself. The iOS app has some additional features. BEGINNERS TUTORIAL This board game is easy to learn but hard to master. All game rules are explained with samples and images on five screen pages. It’s easy to understand and will enable every beginner to play right away! It takes a minute to learn and a lifetime to master.

About

CrazyStone DeepLearning

Play the game of Go against a powerful AI or other players worldwide. Test your skills with certification exams and track your progress in rating mode. Offers various board sizes and difficulty levels for all players.

Highlights
  • Online Go games against global players
  • IAGA Rating Certification Tests
  • 17 levels of play from 15k to 2d
  • Export/import SGF game files
  • Rating Mode with game history
  • Human vs Computer and Human vs Human modes
Features
Read full description

The strongest, the best Go app in the world based on Crazy Stone employing Deep Learning technology ! *New Features* -We have introduced an online game feature. Enjoy online games against players all over the world ! -IAGA Rating Certification Tests Challenge the Dan/Kyu tests provided by the International AI Go Association. -Premium Membership Completely ad free, higher levels and additional features for Premium Members. Crazy Stone has made a huge step forward by combining Deep Neural Networks with Monte Carlo Tree Search. The highest level of Crazy Stone Deep Learning has achieved 5d in kgs rating and in this lite version, we have provided you the highest level of 2d for FREE! * 17 levels of play from 15k to 2d There are 17 levels of play (15k-2d) for all the board sizes. Crazy Stone has improved not only in strength, but also in his style of play and the lower levels are perfect for players who want to learn the game of Go. Now, the strongest level for Premium Members is 5d. * IAGA Rating Certification Test Challenge the Dan/Kyu tests provided by the International AI Go Association. You will be awarded certificate images if you pass the tests. (You will need to register an AI Game Account to challenge the tests. Registration is free)  * Export and import sgf game files You will be able to import and export game records in sgf format from other apps. Also you can copy game record data to the clipboard. * Rating Mode Test your skills with serious games against the AI, keeps track of the results of your games and the history of your rating! The Rating Mode will be partly unlocked if you reach 7k IAGA Rating. If you become a premium member, all of the Rating Mode features will be unlocked immediately. * Other features ・Friendly 3 input methods You can choose from 3 options of input methods (Zoom, Cursor & Touch). ・17 levels of play for each board size (9x9, 13x13, 19x19) ・Human vs Computer, Human vs Human (sharing a single device) ・Computer vs Computer Games ・Handicap games, variable options of Komi ・Hint (suggest) ・Instant Undo (available even when the computer is thinking) ・Automatic territory calculation ・Japanese/Chinese Rules ・Suspend/Re-start games ・Save/Load game record in sgf files ・Automatic and manual replay of a game record ・Highlight the last move ・COM resign feature ・Byoyomi games (You will not be able to select computer level in timed games) ・Atari warning ・Highlight the last move ・Play speed can be adjusted ■ Subscription Details The benefits of Premium Members are: -Completely ad free -Maximum AI playing strength will rise to 5dan -Play Rating Mode for all 3 board sizes -Challenge the IAGA Certification Tests higher than 7kyu About the subscription -Monthly Subscription for Premium Membership. -Customers will be charged a monthly fee to their iTunes Account. -The Subscription will be renewed automatically unless cancelled more than 24 hours before the end of it's current period. -Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. How to cancel the subscription -Form the app Touch the Manage Subscription button and then touch Cancel Subscription. -From your device Move to Settings > iTunes Store and App Store > Apple ID > Subscription -It is not possible to prorate usage fees, cancel or refund the subscription for the current period. -After cancelling the subscription, you will be able to play Engine Server Games until the current subscription period expires. Privacy Policy https://www.unbalance.co.jp/privacy/en/igominna/ Terms of Use https://www.unbalance.co.jp/eula/en/igominna/ * This app is certified by International AI Go Association

Screenshots

Revello (オセロ)4 screens
CrazyStone DeepLearning4 screens

Verdict

The call

The clearest difference is update cadence: Revello (オセロ) at fortnightly against CrazyStone DeepLearning's every 2 months. Revello (オセロ) also leads on review sentiment (83% vs 72%) and iOS requirement (12.0 vs 15.0). CrazyStone DeepLearning's advantage is rating (4.7 vs 4.5) and ratings volume (1K vs 141). On price, ads, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Revello (オセロ) sells 2 one-off in-app purchases and CrazyStone DeepLearning sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

CrazyStone DeepLearning holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: CrazyStone DeepLearning has 1K ratings behind it against 141, so its average is the more settled of the two. Written reviews complicate that: 83% of Revello (オセロ)'s written reviews are positive against 72% of CrazyStone DeepLearning's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Revello (オセロ) ships an update fortnightly, CrazyStone DeepLearning every 2 months. The most recent releases landed on September 17, 2026 and September 23, 2026 respectively.

Scorecard5 real differences · 5 level
Revello (オセロ) versus CrazyStone DeepLearning: the parameters behind the verdict, then further details
ParameterRevello (オセロ)CrazyStone DeepLearning
PriceFreeFree
Rating4.5 (141 ratings)4.7 (1K ratings) — better
Positive reviews82.8% of reviews — better71.5% of reviews
Number of ratings1411K — better
Update frequencyFortnightly — betterEvery 2 months
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size56 MB165 MB
Age rating4+4+
DeveloperFelix WeissUNBALANCE Corporation

Customer experience

Revello (オセロ)

All ratings141 ratings
Positive87.2%
Neutral7.1%
Negative5.7%
Written reviews29 reviews
Positive82.8%
Neutral3.4%
Negative13.8%

CrazyStone DeepLearning

All ratings1,012 ratings
Positive92.7%
Neutral2.8%
Negative4.5%
Written reviews130 reviews
Positive71.5%
Neutral6.9%
Negative21.5%

Bugs and requests

Revello (オセロ)

Not enough reviews yet to summarise bugs or requests.

CrazyStone DeepLearning

Reported bugs

3 issues
  • Issues with input method and stone placement
  • Sound not working
  • Saved game state causing issues with ads

Requested features

5 requests
  • More advanced levels
  • Ability to replay and explore game variations
  • Option to slow down AI response
  • Landscape mode support
  • Analysis mode for premium users

In-app purchases

2 purchases

Revello (オセロ)

One-time2
  • Strategy Coach$1.99
  • Remove Ads$1.99
1 purchases

CrazyStone DeepLearning

Subscriptions1
  • CrazyStone DL Subscription$2.991 Month

Questions

Is Revello (オセロ) free?
Revello (オセロ) is free to download, with in-app purchases available.
Is CrazyStone DeepLearning free?
CrazyStone DeepLearning is free to download, with in-app purchases available.
Which has better reviews, Revello (オセロ) or CrazyStone DeepLearning?
CrazyStone DeepLearning is rated higher. Revello (オセロ) averages 4.5 out of 5 from 141 ratings, while CrazyStone DeepLearning averages 4.7 from 1K ratings.
Do Revello (オセロ) or CrazyStone DeepLearning have ads?
Both Revello (オセロ) and CrazyStone DeepLearning show ads.
Which is updated more often, Revello (オセロ) or CrazyStone DeepLearning?
Revello (オセロ) ships an update fortnightly, and CrazyStone DeepLearning every 2 months. Most recently, Revello (オセロ) was updated on September 17, 2026 and CrazyStone DeepLearning on September 23, 2026.

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