Since Kumon's curriculum is proprietary and delivered via cloud-based centers, a "cracked" app would likely be empty or non-functional without a paid center enrollment.
: Worksheets are not stored locally; they are "delivered" to the tablet based on an instructor's specific plan. A "crack" would need to mimic the entire Kumon instructor backend to provide new material.
Using pirated software is a violation of copyright law and can lead to significant fines or legal action. Why "Cracking" Doesn't Work for Kumon