Chess Prep Pro
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Get the app
Get the app

Free and premium

What is free, and what premium adds

Chess Prep Pro has no repertoire limit and no move limit in the free version. Premium adds the tools that decide what you practise next, and keeps your work backed up.

Free

No limits

The core of the app, with no repertoire or move limits.

  • Unlimited custom repertoires
  • Unlimited moves and variations
  • Entire Repertoire and Single Variation training
  • PGN import and export
  • Analysis board with engine
  • Opening book

No account needed for the core features.

Premium

What premium actually does

9 additions. Everything above stays free, with no repertoire limit and no move limit.

100 75 50 25 4h d1 d3 d8 d22 d30 reviewed left alone recall %
Smart Train Spaced repetition. Each position comes back just before you would have forgotten it, and answering correctly pushes the next review further out.
3… exf4 ×7 5… Nc6 ×5 2… Bc5 ×3 4… Qe7 ×2 times missed
Often Failed Positions Your training history remembers every miss. This mode goes straight to the positions that keep catching you.
added this week already learned
New Positions Drill only what you have just added, without walking through the lines you already know.
session straight after the three you missed, again
Re-train failed positions Finish a session and go back over the moves you got wrong immediately, while you can still remember what you were thinking.
? 32% of games not in your repertoire
Blind Spot Finder Scans your whole repertoire against the game database and reports the replies you have no answer to, most likely first.
0.2% 0.1% rarely played, safe to cut
Smart Trim The opposite job. It finds the branches that almost never occur in real games, so your review time goes somewhere useful.
Vienna Gambit Caro-Kann London System yours to edit every ready-made repertoire, unlimited
Unlimited downloads Every ready-made repertoire, with no cap. They arrive as editable templates, so you can cut and rewrite whatever does not suit you.
your Chess Prep Pro account back up restore
Cloud backup Repertoires back up to your account as a restorable checkpoint, and come back when you sign in on another device.
ADS none, anywhere in the app
Ad-free No ads anywhere in the app. The whole screen belongs to the board.

The details

Do I need an account?

You need an account to download premade repertoires, back up your repertoires, or purchase premium. The rest of the core functionality works without one.

How does premium work across devices?

Premium is linked to your Chess Prep Pro account, so signing in on another supported device carries it with you. You lose access to premium features while signed out.

What happens if I cancel?

You keep your premium features until the date the subscription would have renewed. You can cancel any time and resubscribe any time.

What happens to my repertoires?

Premium backs them up to your account as a checkpoint you can restore. Without premium, export them as PGN files and re-import them whenever you need to.

Is there a one-off price?

Yes, in most regions. Lifetime premium is a single payment with nothing recurring after it. It is not offered everywhere, so the app shows you whether it is available where you are.

Premium is sold as a subscription, and in most places also as a one-off lifetime purchase. The app shows the current price and the full list of premium benefits before you buy. Questions? Email chessprepprohelp@gmail.com.

Start free on iOS or Android

Build a repertoire and train it without paying anything.

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No account needed · no repertoire or move limit · premium optional

See every feature · How to build a repertoire