marble 2.1

Marble 2.1 makes it easier to plan a workout, stay in the flow, and keep your training history yours.

New

• Workout sessions: start, log, repeat, and finish a focused session while every set remains in your Journal.
• Sprint prescriptions: set distance, reps, a target time or range, and rest; each completed rep keeps the exact goal it was judged against.
• Exercise Library: search, favorite, create, and safely edit exercises from one redesigned home.
• Custom exercise icons: choose an emoji or SF Symbol for every movement.
• JSON backup and restore: move a complete local training record between devices without creating an account.

Improved

• Weight-unit normalization keeps lb and kg comparisons accurate across history, records, and trends.
• Release-upgrade coverage now verifies the complete production model before launch.
• Data management explains exactly what is included in a backup and what stays on-device.

Marble remains private and local-first: no accounts, no ads, no tracking.