Crafting delightful mobile apps with Flutter, AI integrations, and modern cloud infrastructure. One developer, full commitment, exceptional results.
One developer with a mission to build products that matter
From idea to MVP in 1-4 weeks. No bureaucracy, just pure execution.
Every feature is built with real users in mind. Data-driven improvements.
Minimal data collection, maximum transparency. Your data stays yours.
Real apps solving real problems
A lightweight yet powerful markdown journaling app. Write without distractions, search everything, sync across devices.
Identity-based habit tracker. Start with "I am..." and build habits that stick. Features habit chains, goals, and smart triggers.
Track your mood on pleasure/arousal axes. Get instant action recommendations to boost your happiness, one small step at a time.
Design your day with focus and breathing room. Visual time blocks, Google Calendar sync, and smart scheduling.
Daily Chinese character learning app. Master Hanja with stroke practice, pronunciation guides, and meaning explanations through systematic lessons.
Modern tools for modern problems
Have an idea? Need a rapid MVP? Want to improve an existing app?
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Effective Date: January 2025
Hanja Haru collects minimal information necessary for providing the service:
We use collected information solely to:
Your data is stored securely using industry-standard encryption. Learning data is stored locally on your device by default, with optional cloud sync through secure servers.
We do not sell, trade, or share your personal information with third parties. Your learning data remains private and under your control.
You have the right to:
Hanja Haru is suitable for all ages. For users under 13, we recommend parental supervision and do not collect any personally identifiable information.
We may update this privacy policy from time to time. We will notify you of any changes through the app.
If you have questions about this privacy policy, please contact us at:
Effective Date: January 2025
By downloading, installing, or using Hanja Haru ("the App"), you agree to be bound by these Terms of Use. If you do not agree to these terms, please do not use the App.
Raynear Soft grants you a personal, non-exclusive, non-transferable, limited license to use the App for personal, educational purposes. This license is subject to your compliance with these Terms of Use.
You are responsible for:
You agree not to:
All content in the App, including but not limited to text, graphics, logos, images, audio, and software, is the property of Raynear Soft or its content suppliers and is protected by international copyright laws.
By submitting any content to the App, you grant Raynear Soft a worldwide, non-exclusive, royalty-free license to use, reproduce, and display such content solely for the purpose of operating and improving the App.
The App is provided "as is" without any warranties, express or implied. Raynear Soft does not warrant that:
To the maximum extent permitted by law, Raynear Soft shall not be liable for any indirect, incidental, special, consequential, or punitive damages arising out of or related to your use of the App.
You agree to indemnify and hold harmless Raynear Soft from any claims, damages, or expenses arising from your violation of these Terms of Use or your use of the App.
Raynear Soft reserves the right to modify these Terms of Use at any time. We will notify users of any material changes through the App. Continued use of the App after such modifications constitutes acceptance of the updated terms.
We may terminate or suspend your access to the App immediately, without prior notice, for any reason, including breach of these Terms of Use.
These Terms of Use shall be governed by and construed in accordance with the laws of the Republic of Korea, without regard to its conflict of law provisions.
For questions about these Terms of Use, please contact us at:
Effective Date: January 2025
MD Journal is designed with privacy at its core. We believe your thoughts and memories belong to you alone. This app operates with a zero-knowledge approach to your personal data.
MD Journal does not:
Local-First Architecture:
If you choose to enable iCloud sync:
MD Journal uses your device's biometric authentication:
We collect only anonymous usage statistics to improve the app:
You can opt-out of analytics in app settings.
You have complete control over your data:
Your journal entries remain on your device until you choose to delete them. If you delete the app, all local data is removed immediately. iCloud data can be managed through your iCloud settings.
MD Journal is suitable for users of all ages. We do not knowingly collect personal information from children. The app operates the same way for all users, with complete privacy protection.
We believe in transparency. Key components of our encryption and privacy implementations are open source and available for security audits.
We may update this policy to reflect app improvements or legal requirements. You'll be notified in-app of any significant changes. Your continued use indicates acceptance of updates.
Questions about your privacy or this policy? We're here to help:
Remember: Your stories are yours alone. We're just providing the secure, private space to write them.