Study app for WGU D426 Data Management Foundations
D426 Mastery Last Updated: April 7, 2026
By downloading, installing, or using D426 Mastery (“the App”), you agree to be bound by these Terms of Service (“Terms”). If you do not agree to these Terms, do not use the App.
D426 Mastery is an educational iOS application designed to help students study for the D426 Data Management Foundations course. The App provides flashcards, quiz questions, a SQL playground, an ER diagram builder, and study tracking tools.
Disclaimer: D426 Mastery is an independent study aid and is not affiliated with, endorsed by, or sponsored by Western Governors University (WGU), Pearson, or any other educational institution.
You must be at least 17 years old to use the App. By using the App, you represent that you meet this age requirement.
The App offers limited free access including a subset of flashcards, one sample SQL database, one mock exam per day, and basic statistics.
D426 Mastery Premium is available as:
All payments are processed by Apple through the App Store. By purchasing a subscription, you agree to Apple’s Terms and Conditions.
Monthly subscriptions automatically renew unless cancelled at least 24 hours before the end of the current billing period. You can manage or cancel your subscription in your Apple ID account settings.
Refund requests are handled by Apple according to their refund policies. To request a refund, visit Apple Support.
All content within the App, including but not limited to flashcard text, quiz questions, explanations, sample database schemas, user interface designs, and source code, is the property of Ellasid and is protected by copyright law.
You are granted a limited, non-exclusive, non-transferable license to use the App for personal educational purposes only.
You may not:
D426 Mastery is a study aid only. We do not guarantee that using the App will result in passing any examination, including the D426 Objective Assessment.
While we strive for accuracy in all educational content, we do not warrant that all information is error-free or up-to-date with the latest course material. Course content may change at the discretion of WGU.
The App is intended to supplement, not replace, official course materials, textbooks, and instructor guidance.
Your use of the App is also governed by our Privacy Policy. All study data is stored locally on your device and is not transmitted to our servers.
To the maximum extent permitted by applicable law:
We reserve the right to modify these Terms at any time. Changes will be reflected by updating the “Last Updated” date. Continued use of the App after changes constitutes acceptance of the updated Terms.
We may terminate or suspend your access to the App at any time, without prior notice, for conduct that we believe violates these Terms or is harmful to other users or the App.
These Terms shall be governed by and construed in accordance with the laws of the United States, without regard to conflict of law principles.
If you have questions about these Terms, contact us at:
Email: support@ellasid.com
D426 Mastery is not affiliated with or endorsed by Western Governors University (WGU).