Comparison

Chess Opener PRO vs Chess Notation Trainer Pro

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

Head to head
About

Chess Opener PRO

Master chess openings with a comprehensive trainer and explorer. Analyze grandmaster repertoires, build your own opening lines, and memorize variations with interactive training. Works offline with no ads.

Highlights
  • Chess opening tree with statistics
  • Encyclopedia of Chess Openings (ECO)
  • Grandmaster repertoire database
  • Stockfish engine analysis
  • Interactive opening trainer
  • Build and manage opening repertoire
  • PGN import/export
Features
Read full description

Features: - Chess opening tree with game statistics - The Encyclopedia of Chess Openings (ECO) - Database of top 100+ grandmasters’ repertoires - Stockfish chess engine analysis - Compare ECO, opening tree and engine moves side by side in any position - Import and export chess openings in PGN format - Build your own opening repertoire - Add or edit comments on moves - Automatically classify any sequence of moves using the ECO system - Chess opening explorer highlights moves already in your repertoire - Chess database includes all transpositions - Interactive trainer to memorize your chess openings and variations - Train multiple variations at once against random opponent moves from your repertoire - Set up a starting position for training - Track your training progress - Customize chessboard colors and chess pieces - Supports dark mode - No ads - Works completely offline CHESS OPENING EXPLORER Search in the Encyclopedia of Chess Openings, browse the chess opening tree, explore the opening repertoires of famous chess grandmasters, or ask the chess engine to find the best moves. Swipe left or right to switch between the exploration features in any position. BUILD YOUR OPENING REPERTOIRE Add your favorite opening lines to your repertoire using the chess opening explorer or import your openings in PGN format from other chess programs. You can always edit the names of your openings and organize them in your repertoire. OPENING TRAINER A simple and efficient method to memorize variations of openings in your repertoire. You can train either white’s moves or black’s moves only or both. Optionally, you can train all variations at once. The trainer chooses the opponent’s moves randomly from your opening repertoire. Chess Opener tracks your progress and shows your stats.

About

Chess Notation Trainer Pro

Features
Read full description

Serious about chess? But struggling to identify the squares, remembering sequences and following notations? Well, you just landed on the perfect app! This training app is designed to dramatically uplift your mastery over chess squares. There are 5 training sessions. A small dose of regular practice will make you: 1. Spot a square as soon as you hear/see its coordinate 2. Translate a sequence of moves into their notation at ease 3. Immediately identify the color of a square 4. Stay oriented regardless of you facing white or black 5. Follow along with chess tutorials, books or any discussion without a board 6. Massively speedup your thought process on any calculation 7. Finally, start playing blind chess! There are well thought out features everywhere, like different time controls for training, untimed practice mode, hints and tips during gameplay, achievements and milestones, global leaderboards and a complete visualization of your records. Don't be surprised if you see a sudden surge of rating simply increasing your strength on square reading. This is a beautiful and satisfyingly addictive way to your square mastery. Caution: If you are rated below 1500, this app is probably not gonna be as useful for you, and tactics training is something you should prioritize.

Screenshots

Chess Opener PRO4 screens
Chess Notation Trainer Pro4 screens

Verdict

The call

The clearest difference is update cadence: Chess Notation Trainer Pro at every 6 days against Chess Opener PRO's every 5 weeks. Chess Notation Trainer Pro also leads on price ($4.99 vs $8.99). Chess Opener PRO's advantage is iOS requirement (15.1 vs 18.6). 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 Opener PRO costs $8.99 and Chess Notation Trainer Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Chess Opener PRO ships an update every 5 weeks, Chess Notation Trainer Pro every 6 days. The most recent releases landed on September 25, 2026 and September 7, 2026 respectively.

Scorecard3 real differences · 7 level
Chess Opener PRO versus Chess Notation Trainer Pro: the parameters behind the verdict, then further details
ParameterChess Opener PROChess Notation Trainer Pro
Price$8.99$4.99 — better
Rating4.4 (80 ratings) — better—
Positive reviews75.9% of reviews—
Number of ratings80 — better—
Update frequencyEvery 5 weeksEvery 6 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better18.6
Further details — not scored
Size146 MB26 MB
Age rating4+4+
DeveloperStanislav BasovnikNishat Majid

Bugs and requests

Chess Opener PRO

Reported bugs

6 issues
  • Invalid PGN import
  • Crashes quite often
  • Repeats same variation
  • Cannot review lines while training
  • App not functioning with iOS 16.7.4
Show 1 more
  • PGN import is tedious and doesn't support variants

Requested features

12 requests
  • Include position setting
  • Start study from a later position
  • Multiple folders for simultaneous practice
  • Option to switch between figure visibility modes (normal, queen pieces, none)
  • Blindfold practice option
Show 7 more
  • Show +1 for capturing a pawn
  • iCloud sync across devices
  • Organize repertoires (move, sort, add folders)
  • Predefine variants not to reappear during training
  • User guide or help information
  • Support for split screen
  • Fix compatibility with iOS 16.7.4

Chess Notation Trainer Pro

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Chess Opener PRO

No in-app purchases

None

Chess Notation Trainer Pro

No in-app purchases

Questions

Is Chess Opener PRO free?
Chess Opener PRO costs $8.99, with no in-app purchases.
Is Chess Notation Trainer Pro free?
Chess Notation Trainer Pro costs $4.99, with no in-app purchases.
Do Chess Opener PRO or Chess Notation Trainer Pro have ads?
Neither Chess Opener PRO nor Chess Notation Trainer Pro shows ads.
Which is updated more often, Chess Opener PRO or Chess Notation Trainer Pro?
Chess Opener PRO ships an update every 5 weeks, and Chess Notation Trainer Pro every 6 days. Most recently, Chess Opener PRO was updated on September 25, 2026 and Chess Notation Trainer Pro on September 7, 2026.

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