Updated October 14, 2026. Version 0.7 was verified live in the US App Store on this date. The App Store shows the version available in your region.
VERSION 0.7 · PAWNIE & THE LOST SIGNAL
A companion and a playable adventure.
Meet Pawnie through a short hands-on setup. Choose its appearance, animation and help level in Settings or Profile. Restore the observatory through twenty playable chambers in The Lost Signal, with guidance for new and experienced chess players.
Contextual built-in help, optional reminders, clearer legal-move markers and compact help actions keep the next step close at hand. Pawnie, setup and the story support all eight app languages.
Explore Pawnie and the story →VERSION 0.6 · OPENING PREVIEWS
See the position before you begin.
Choose starting pieces with mini maps, then explore the opening in 2D, 3D or 4D before starting a game. Refined connection lines, selection rings and smoother New Game transitions make spatial boards easier to follow.
Explore the board features →VERSION 0.5 · DAILY LEARNING
A richer puzzle collection.
Explore 102 puzzles across five learning levels, including six spatial challenges. Build a daily streak, return to the collection you came from, and find the full course in one place.
Free players keep a set of three puzzles until all are solved; the next set opens the following day. Plus unlocks the entire collection.
Learn how puzzle access works →VERSION 0.4 · MORE ROOM TO EXPLORE
Linked views on a wider display.
On an open iPhone Duo, use linked flat and spatial boards and swap their sides while keeping the same position. Learn and Study adapt to the wider display too. iPad also supports flat and spatial views side by side.
VERSION 0.3 · FOURFOLD PLUS & STUDY
Keep the ideas from your games.
Save and review positions, create personal practice, and organize notes and collections with optional Fourfold Plus. Core play, online games, Quick helper, replay, basic analysis and existing lessons remain free.
Compare free and Plus →