Digit Span Trainer

Train your working memory with Forward, Backward, and Sequencing challenges. Choose visual or spoken digits, repeat them correctly, and build your span over time.

Free Core:

• All three Classic modes and Training Journey
• Visual and audio presentation
• Personal bests, charts, accuracy, streaks, and recall speed
• Local Next session recommendations
• CSV import and export
• Multiple visual themes
• Ad-free and usable offline without an account

Digit Span Lab — optional permanent unlock:

• Save custom local training programs and presets
• Run advanced local mode-switch, dual-channel, and overload drills
• Study serial-position errors and response-time patterns
• Compare recent and prior performance in deeper local reports
• Set local goals and share a saved report snapshot
• Pay once through Google Play; no Coach sign-in required
• Lab includes no AI Coach credits

Span Coach — separate optional service:

• Sign in to claim 10 lifetime personalized Coach samples, with one available per UTC day
• Turn a Coach plan into a focused five-round session and review the result
• Add a repeatable one-time Coach Pack with 365 non-expiring insights
• No Coach subscription is offered to new customers; an existing legacy subscriber can still manage the subscription already purchased

A Lab refund or revocation relocks Lab editing and drills without deleting saved local programs or the last saved report. Generated Span Coach plans and reviews require Google sign-in and an internet connection. Signed-in users can permanently delete their Coach cloud account in More > Settings > Account. The Google-authenticated account-deletion page linked from Google Play works without the app.

Published by PierDo.

OPTIONAL SUPPORT
Choose a preset tip to support PierDo. Tips are separate, repeatable purchases and add no Lab features or Coach credits.

Recent changes:
Themes and training now load without waiting for purchase checks. Clearer loading feedback and a refresh option help when Google Play responds slowly.