Fun HSK Chinese
Education / Language
Vocabulary, example sentences, and review for Chinese learners. Progress stays on your device. No sign-up required.
Small apps for everyday life.
A directory of apps built by RuRu Lab. Open each card for privacy policy, terms, and support.
Apps
RuRu PDF
Productivity / Documents
Merge, split, and convert PDFs on iPhone. Mobile companion to our web tools. Coming soon.
RuRu Scan
Productivity / Scanner
Scan documents to PDF with OCR text extraction. Coming soon.
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Minimal data collection
We only collect what is necessary. Much processing stays on your device.
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Clear terms
Pricing, auto-renewal, cancellation, and business info are documented on each page.
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Responsive support
We respond thoughtfully to every inquiry.