Refrigeration Engineer 1,2,3
Education In-app purchases
One purchase unlocks all included levels, with separate progress per course.
- Downloads
- 11+
- on Google Play
- Price
- Free
- In-app purchases
- Updated
- Oct 16
- 2026 · v1.1.3
Screenshots
About Refrigeration Engineer 1,2,3
One purchase unlocks all included Class 1, 2 and 3 courses. Progress and exam dates remain separate. The 112 law/safety questions are shared; Class 2 adds 40 academic questions. Class 1 includes 28 calculation/written exercises with model answers for self-check. Its multiple-choice mock covers law and safety only; written answers are not automatically scored and there is no combined three-subject pass judgment.
Japanese learning content: per-choice explanations, practice mocks, weak-question review and study records. No subscription. This is an unofficial study aid, not a guarantee of complete examination coverage or passing. Free drill allowance is cumulative; full mocks and continuing weak/unseen review require the shared Pro purchase. Existing base-course purchases are preserved.
Privacy: https://particlesandwaves.org/ja/privacy/
Support: https://particlesandwaves.org/support/
Japanese learning content: per-choice explanations, practice mocks, weak-question review and study records. No subscription. This is an unofficial study aid, not a guarantee of complete examination coverage or passing. Free drill allowance is cumulative; full mocks and continuing weak/unseen review require the shared Pro purchase. Existing base-course purchases are preserved.
Privacy: https://particlesandwaves.org/ja/privacy/
Support: https://particlesandwaves.org/support/
What’s new
Version 1.1.3 · Updated October 16, 2026
設定画面を整理し、プライバシーポリシーへの案内だけを残しました。学習記録と購入済みの内容はそのまま使えます。
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