Comparison

Backgammon NJ HD vs Chess Clock

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

Head to head
About

Backgammon NJ HD

Play backgammon against a powerful AI, a friend on the same device, or players worldwide. Improve your skills with tutor mode and detailed analysis. Offers customizable options and supports all iOS devices.

Highlights
  • Neural network AI
  • Online multiplayer (real-time & turn-based)
  • 2-player mode on one device
  • Tutor Mode & Hints
  • Customizable board and checkers
  • Match play and single games
  • Game Center integration
Features
Read full description

● GAME CENTER -- Play online, chat, invite friends, auto-match with random players { Real-time } Play online in real-time { Turn-based } Play online at your own pace ● VERSATILE -- Play offline vs. computer or against another person in 2-player mode ● CUSTOMIZABLE -- More options than any other backgammon app ● UNIVERSAL -- Supports iPad, iPhone, & iPod touch Play & learn backgammon at skill levels from beginner to world-class! Backgammon NJ HD is a full-featured game which uses an advanced, neural network-based, artificial intelligence. Play against a computer AI, another person in 2-player mode on one device, or online against friends & others. Using Tutor Mode & Hints, Backgammon NJ HD can show you how to improve your game. Discriminating players will appreciate how well the AI plays. It uses a neural network trained on millions of positions, a bearoff database, & a match equity table to achieve strong gameplay that will challenge even expert players. REVIEWS "[I] know strong bg play when I see it. This app is the strongest iPhone bg app I've played with by far. It does not cheat period. ...Analyzing these matches with eXtreme Gammon confirms a world class level of play with normal luck factors. If you are losing, get over it. So would 99.9% of the other backgammon players in the world. It is just that good. Learn from it." -Richard Munitz, Giant of Backgammon, #21 world ranking in 2009 "Backgammon NJ plays at an extremely high level with an excellent interface, and I often use it to practice on my iPhone when I am traveling. I recommend it highly to my students & friends." -Phil Simborg, Professional Backgammon Teacher & Player, www.mindgamescenter.com "I've played over 500 games now; I've checked about 5% of these against World Class Desktop programs (GNU, BGBlitz); and I've actually used some of the competition. NJ has the best interface & has more useful functions than any other backgammon apps out there." "For serious backgammon players, Backgammon NJ is the way to go." -Macworld.com, May 2012 IS THIS GAME RIGHT FOR YOU? This game is best for people: • Who recognize the strength of neural network backgammon bots • Who want to improve their game by playing against a world-class level AI • Who will use the in-depth, technical features included in the app to prove that it is honest (https://www.njsoftware.com/note.html) • Who won't expect to win consistently on the higher skill levels FEATURES • Neural network-based AI • 2 game types: Standard Backgammon or Nackgammon • 4 skill levels: Easy, Medium, Hard, Expert • Customizable board design & checker colors • Mersenne Twister algorithm for random number generation • Doubling cube • Single games or match play up to 25 pts • Crawford rule for match play • 1-player mode vs. computer • 2-player mode on one device • Game Center: Play real-time or turn-based online matches with friends & other players • Chat with your online opponent • Online Elo & Experience leaderboards • Block list for auto-match • Tap-to-move interface • Highlighted checker movement options • Hint & Undo • Learn with Tutor Mode • Game & dice stats, including Elo rating & ER • Match info: GnuBG ID, win chances, equity, top 10 moves, cube decisions • Email match files • Practice mode with unlimited undo (1-player vs. computer) • Manual match recording mode with unlimited undo & speed mode option • Options to reverse board direction, resign, use one-tap moves, auto bearoff, auto finish, use Jacoby rule, & much more • Match analysis (in-app purchase): Analyze past match files, view moves & errors for match, step through match, jump to position, play from position, save match files permanently IMPORTANT • If an online match ends for any reason, you'll receive the Elo pts you deserve. FAQ: https://gamecenter.njsoftware.com • Contact us for help: https://contact.njsoftware.com

About

Chess Clock

Features
Read full description

Flag is a focused chess clock for over-the-board (OTB) games. Choose a preset, start the clock, and tap your side after each move. Flag stays out of the way with large tap zones, clear timers, no ads, no account, and works fully offline. Built for tournament and casual play: • Bullet, blitz, rapid, and custom time controls • Fischer increment, Bronstein delay, simple delay, and no-increment games • Asymmetric time odds for White and Black • Move counter, pause, reset, and state restoration • Live Activities on supported iPhone and iPad devices • Sounds, haptics, and clean Pro themes Core chess clock functionality is free. Flag Pro is a one-time upgrade for saved custom time controls and premium themes. Privacy Policy: https://app.notion.com/p/Flag-Privacy-Policy-39e5afe876e3802698d5f595beccc284?source=copy_link Terms of Use: https://app.notion.com/p/Flag-Terms-of-Use-39e5afe876e3806fa9ecd13557c107df?source=copy_link

Screenshots

Backgammon NJ HD4 screens
Chess Clock4 screens

Verdict

The call

The clearest difference is price: Chess Clock at Free against Backgammon NJ HD's $7.99. Chess Clock also leads on update cadence (every 2 weeks vs every 5 months). Backgammon NJ HD's advantage is iOS requirement (15.4 vs 17.0). On 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

CostPrice · In-app purchases · Ads · Monetization

Chess Clock is free to download; Backgammon NJ HD costs $7.99 up front. Backgammon NJ HD sells 3 one-off in-app purchases and Chess Clock sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Backgammon NJ HD ships an update every 5 months, Chess Clock every 2 weeks. The most recent releases landed on October 12, 2026 and September 27, 2026 respectively.

Scorecard3 real differences · 7 level
Backgammon NJ HD versus Chess Clock: the parameters behind the verdict, then further details
ParameterBackgammon NJ HDChess Clock
Price$7.99Free — better
Rating4.5 (3.6K ratings) — better—
Positive reviews55.5% of reviews—
Number of ratings3.6K — better—
Update frequencyEvery 5 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.4 — better17.0
Further details — not scored
Size55 MB14 MB
Age rating4+4+
DeveloperJimmy HuDamir Stuhec

Bugs and requests

Backgammon NJ HD

Reported bugs

3 issues
  • Frequent crashes
  • Unreliable online play and matchmaking
  • Issues with syncing progress across devices

Requested features

4 requests
  • Manual dice rolling option
  • Ability to undo moves
  • Improved online/multiplayer experience
  • More difficulty levels

Chess Clock

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Backgammon NJ HD

One-time3
  • Analysis Package$2.99
  • Online VIP$2.99
  • Power User$4.99
1 purchases

Chess Clock

One-time1
  • Flag Pro$4.99

Questions

Is Backgammon NJ HD free?
Backgammon NJ HD costs $7.99, and also offers in-app purchases.
Is Chess Clock free?
Chess Clock is free to download, with in-app purchases available.
Do Backgammon NJ HD or Chess Clock have ads?
Neither Backgammon NJ HD nor Chess Clock shows ads.
Which is updated more often, Backgammon NJ HD or Chess Clock?
Backgammon NJ HD ships an update every 5 months, and Chess Clock every 2 weeks. Most recently, Backgammon NJ HD was updated on October 12, 2026 and Chess Clock on September 27, 2026.

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