Comparison

HIARCS Chess vs Openings Mastermind

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

Head to head
About

HIARCS Chess

This app offers a powerful chess engine for playing, analyzing, and learning chess. It provides adjustable difficulty levels and coaching features to help players of all abilities improve their game. Analyze professional games and track your progress with an Elo rating.

Highlights
  • World Championship winning chess engine
  • Adjustable playing strengths and styles
  • Advanced coaching features
  • Elo rating tracking
  • PGN database support
  • Large tournament book
  • Multiple playing modes
Features
Read full description

HIARCS is a multiple World Championship winning chess program and the only handheld chess program in the world which has won matches and tournaments with Grandmasters. It twice won the Mercusor Cup in Buenos Aires, Argentina ahead of Grandmasters with a performance of 2900 Elo, the best chess performance rating for any handheld device in history. In 1997 the World's strongest ever human chess player, Garry Kasparov, said "HIARCS is much better positionally than Deep Blue" and even the current World champion, Vishy Anand, in a recent interview when asked what chess program he uses to analyse with said "generally I use HIARCS". This power enables your iPhone to play chess like a super Grandmaster, analyse games and chess problems with you, or play at whatever weakened chess strength you want from beginner to GM strength while offering numerous features to help you learn and improve as you play with HIARCS. An advanced set of coaching features helps players of all strengths improve their chess play. HIARCS Chess has a full range of realistic weaker opponent strengths and playing styles catering for players of all abilities from absolute beginners to Grandmasters. On the weaker playing levels HIARCS will make human-like mistakes appropriate to the level of play and this together with the integrated coach advice, assessments and alerts allow you to learn and improve quickly. HIARCS also monitors your chess performance and provides you with an Elo chess rating which tracks your chess ability in every game. It can continuously adjust its playing strength to give you challenging but beatable opponents as you improve. HIARCS Chess will save battery life by using much less energy on the weaker levels, allowing more playing time on long journeys etc. HIARCS Chess supports PGN chess game databases and has all the games between Fischer & Spassky and Kasparov & Karpov for you to play through and enjoy. HIARCS has a large tournament book which is up to date with chess theory with over 235,000 variations. The book moves are displayed on screen with chess symbols and the opening variations are named and ECO coded. Key features: + Strongest chess program on iPhone and iPod Touch, genuine strong GM-level performance + Suitable for all players from absolute beginners to strong Grandmasters with many handicap levels and opponents styles and advanced coaching + Intuitive and friendly user interface with multiple high quality pieces set, colour schemes and icons including high res support for iPhone 4 and 5 retina displays + Multiple playing modes: play white, black, both sides in two player mode, continuous analysis and interactive replay + Fully adjustable Elo strengths, adaptive levels and multiple playing levels and opponents + All levels below maximum are low energy to increase battery life + Rates your chess play and gives you an Elo rating which is updated after each game + Advanced coach can provide move options, give hints, indicate move safety and quality highlights and watch your play and warn about mistakes + Transfer PGN databases to/from HIARCS chess via iTunes file sharing, email games and PGN DBs from HIARCS + Launch HIARCS from PGN email attachments + Load, save or delete games to/from PGN databases + Set up or edit a position to analyse or play from + Advanced game navigation with game move slider and VCR buttons for rapid and precise game navigation + Many selectable preset blitz, incremental and average time clock settings for timed play + Large HIARCS tournament opening book as used by the professionals! + Permanent brain for enhanced playing strength + Numerous chess display functions for showing chess moves, analysis, book moves, coach advice, move quality even legal moves, offer draws or resign + 8 Piece sets and 9 colour schemes + Integrated Html manual and help screens A discount coupon is included with a $10 USD discount on other HIARCS products on Mac and PC from www.hiarcs.com.

About

Openings Mastermind

Master chess openings with this app. Import studies, explore with advanced engines, and practice specific lines through repetition. Track your progress and improve your game.

Highlights
  • Import Lichess Studies or PGNs
  • Explore openings with Stockfish 15
  • Practice openings by repetition
  • Smart practice queue
  • Track learning progress
Features
Read full description

Get ready to take your chess game to the next level with Openings Mastermind, the ultimate chess opening app! Some of the features include: - Import Lichess Studies or custom PGNs - Explore openings with Stockfish 17 and the Lichess position database - Practice openings by repetition against your own custom openings database - Take advantage of the smart practice queue and improve your learning - Observe your learning progress in different openings With our app, you can take your opening game to the next level by practicing against the specific lines you want to master. Whether you're a beginner or an experienced player, our app is the perfect tool to help you improve your opening moves and become a better chess player. Planned Features: - Continue against engine, after study line ends - Analysis of your games from Lichess and Chess.com compared to your openings database

Screenshots

HIARCS Chess4 screens
Openings Mastermind4 screens

Verdict

The call

The clearest difference is price: Openings Mastermind at Free against HIARCS Chess's $9.99. Openings Mastermind also leads on update cadence (fortnightly vs every 3 months). HIARCS Chess's advantage is rating (4.8 vs 4.3) and review sentiment (76% vs 50%). 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

Openings Mastermind is free to download; HIARCS Chess costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

HIARCS Chess holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: HIARCS Chess has 204 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 76% of HIARCS Chess's written reviews are positive against 50% of Openings Mastermind's.

UpkeepUpdate frequency

HIARCS Chess ships an update every 3 months, Openings Mastermind fortnightly. Both last shipped on October 24, 2026.

Scorecard7 real differences · 3 level
HIARCS Chess versus Openings Mastermind: the parameters behind the verdict, then further details
ParameterHIARCS ChessOpenings Mastermind
Price$9.99Free — better
Rating4.8 (204 ratings) — better4.3 (6 ratings)
Positive reviews75.9% of reviews — better50.0% of reviews
Number of ratings204 — better6
Update frequencyEvery 3 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.0 — better18.6
Further details — not scored
Size21 MB88 MB
Age rating4+4+
DeveloperApplied Computer Concepts Ltd.Christian Heise

Customer experience

HIARCS Chess

All ratings199 ratings
Positive95.5%
Neutral1.0%
Negative3.5%
Written reviews220 reviews
Positive75.9%
Neutral5.9%
Negative18.2%

Openings Mastermind

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Bugs and requests

HIARCS Chess

Reported bugs

3 issues
  • Crashes on certain iOS versions
  • Discount codes not working
  • Issues with hotspot mode

Requested features

5 requests
  • PGN import/export functionality
  • Advanced database navigation (next/previous game)
  • Endgame tablebase support
  • Improved UI/UX for modern devices
  • More customization options

Openings Mastermind

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

HIARCS Chess

No in-app purchases

None

Openings Mastermind

No in-app purchases

Questions

Is HIARCS Chess free?
HIARCS Chess costs $9.99, with no in-app purchases.
Is Openings Mastermind free?
Openings Mastermind is free to download, with no in-app purchases.
Which has better reviews, HIARCS Chess or Openings Mastermind?
HIARCS Chess is rated higher. HIARCS Chess averages 4.8 out of 5 from 204 ratings, while Openings Mastermind averages 4.3 from 6 ratings.
Do HIARCS Chess or Openings Mastermind have ads?
Neither HIARCS Chess nor Openings Mastermind shows ads.
Which is updated more often, HIARCS Chess or Openings Mastermind?
HIARCS Chess ships an update every 3 months, and Openings Mastermind fortnightly. Most recently, HIARCS Chess was updated on October 24, 2026 and Openings Mastermind on October 24, 2026.

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