Exhibit A

JOINT FILING AGREEMENT

The undersigned agree that this Schedule 13G dated August 14, 2025 relating to the Class A Common Stock, par value $0.00001, of Hinge Health, Inc. shall be filed on behalf of the undersigned.

COATUE MANAGEMENT, L.L.C.

By: /s/ Philippe Laffont

Name: Philippe Laffont

Title:   Authorized Signatory

PHILIPPE LAFFONT

By: /s/ Philippe Laffont

COATUE GROWTH FUND IV LP

By: Coatue Growth Fund IV GP LLC, it general partner

By: /s/ Philippe Laffont

Name: Philippe Laffont

Title:   Authorized Signatory

COATUE US 70 LLC

By: Coatue Management, L.L.C., its investment manager

By: /s/ Philippe Laffont

Name: Philippe Laffont

Title:   Authorized Signatory