We believe good software should be invisible — it should help you do your work and stay out of the way. Every tool we build at CASIUS starts from a real problem, is designed with care, and ships only when it is genuinely useful. No unnecessary features. No clutter. No compromises on quality.
A vocabulary learning app for English learners. Look up words using the Merriam-Webster dictionary, save definitions with your own translation, and reinforce them through a spaced repetition quiz.
A desktop tool for engineers who review design documents and technical drawings. Extracts all comments and annotations from PDF files and exports them to a structured Excel file — eliminating manual copy-paste work.
Effective date: May 2026 · Applies to: WordTrainer (Android & iOS)
CASIUS ("we", "our") is committed to protecting your privacy. This policy explains what data is collected when you use WordTrainer and how it is handled.
WordTrainer stores all data locally on your device only:
This data is never transmitted to our servers. It remains on your device and is deleted when you uninstall the app.
WordTrainer uses the Merriam-Webster Collegiate API to look up word definitions. When you search for a word, that word is sent to Merriam-Webster's servers to retrieve its definition. Please refer to Merriam-Webster's Privacy Policy for details on how they handle this data.
WordTrainer does not knowingly collect any personal data from children under the age of 13.
If this policy changes materially, we will update the effective date above. Continued use of the app after changes constitutes acceptance of the revised policy.
For privacy-related questions, contact us at info@casiussoft.com.