GrandmasterStrongest local heuristic, not a trained model.
Study
Three hundred and fifty lessons
Seven levels, fifty lessons in each. Free opens the first level. The other six are listed for Plus and stay closed, because Plus is not for sale. If a lesson is not written yet, the app says so.
7Levels
50Lessons in each
350In the Academy
Beside the board
Coach
During a game against a bot, and after it, Coach writes two answers: what to study next, and why a move was wrong. It does not speak, and it is not an open conversation. The interactive coach belongs to a later Premium plan and is not in this version.
On this phone
ATOM
ATOM reads the results saved on the device. It records mistakes and suggests a lesson. It does not read the internet, and it does not run the longer programme described for Pro or Premium.
Membership
Four plans
Prices in euros, as recorded on 13 November 2026. Only Free is the version you can use. Plus, Pro and Premium are listed. They are not for sale, and there is no purchase in the app.
Open now
Free
€0 / month
€0 / year
The seven opponents, all four strengths, the first Academy level, five puzzles a day and two hints in a bot game. No ad is shown in this version.
Listed · not for sale
Plus
€5.99 / month
€44.99 / year
Online play, a weekly tournament and extra hints are written down for Plus. They are not in this version.
Listed · not for sale
Pro
€9.99 / month
€74.99 / year
A monthly tournament, a fuller review and reports are written down for Pro. They are not in this version.
Listed · not for sale
Premium
€15.99 / month
€114.99 / year
An interactive coach, a training plan and unlimited hints are written down for Premium. They are not in this version.