Exchange Support
Exchange is a deterministic commodities strategy game for iOS and macOS. This page covers common support checks for save files, offline progress, and App Store review.
Save and restore
Your save is stored locally on-device. Open Settings in the app to save immediately, copy a save code, or import a save code from another device.
Offline progress
The simulation advances when you return to the app, capped to prevent runaway offline state changes. Market movement is deterministic from the saved seed.
No account required
There is no login, subscription, cloud account, or purchase required to play the game.
Contact
For App Store review or player support, contact the developer through the Apple Developer account associated with DAS Games, or use the App Store support contact field configured for Exchange.
Last updated: June 24, 2026