These Terms of Service (“Terms”) govern your use of the Nocturn mobile application (“Nocturn”, “the app”), developed and operated by Sukhwinder Singh, an individual trader writing as S. S. Dhillon (“we”, “us”), based in Punjab, India. By downloading, installing or using Nocturn, you agree to these Terms. If you do not agree, do not use the app.
1. About Nocturn
Nocturn is a habit and sleep-tracking app designed for night-shift workers and people on rotating schedules. It provides a custom rolling 24-hour day window, a shift roster with rotation presets, a daily habit checklist, sleep logging, and AI-generated coaching content (a Coach Briefing, a Weekly Recap, habit suggestions and an “Ask Nocturn” chat feature). How Nocturn handles your data is explained in our Privacy Policy, which forms part of these Terms.
2. Age requirement
Nocturn is intended for adults aged 18 and over who work shift schedules. It is not directed to anyone under 18, and you must be at least 18 years old to use the app.
3. Your account
Nocturn signs you in anonymously through Google Firebase Authentication. There is no name, email address or password associated with your account. You are responsible for your device and for keeping it secure, since anyone with access to your device can access your Nocturn data and, if you have Nocturn Pro, your subscription.
4. Nocturn Pro subscription
Nocturn Pro is an auto-renewing subscription (monthly or yearly) sold through Google Play and managed via Google Play Billing. Key points:
- If the app offers a free trial, you will be charged when the trial ends unless you cancel before then.
- Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current billing period.
- You can manage or cancel your subscription at any time in Google Play › Subscriptions, or from Settings → Manage subscription inside the app.
- Deleting the app does not cancel an active subscription — you must cancel it through Google Play.
- Pro is active on one copy of the app at a time. Restoring your purchase on a new copy (after a reinstall, clearing app data, or on another device) moves Pro to that copy.
- Refunds for purchases made through Google Play are handled under Google Play’s own refund policies, not by us directly.
Without Pro, AI coaching is limited to 5 AI requests per custom day.
5. Acceptable use
You agree to use Nocturn only for its intended personal, non-commercial purpose. You may not reverse-engineer, decompile or tamper with the app, attempt to bypass the free-tier AI request limit or subscription checks, use the app to harm, harass or endanger yourself or others, or use automated means to access or interact with the app’s backend services.
6. AI-generated content is not medical advice
Nocturn’s Coach Briefing, Weekly Recap, habit suggestions and chat replies are generated automatically using Google’s Gemini AI model and can be wrong. They are general wellness information only, not medical advice, and are clearly labelled as AI-generated. Nocturn is not a medical device. Always use your own judgement, and consult a qualified healthcare professional for medical concerns, sleep disorders, or before making health-related decisions. If you are in danger or experiencing a medical emergency, contact local emergency services immediately — do not rely on the app.
7. Your content and data
Your habits, sleep log, shift roster and settings belong to you and are stored primarily on your own device, as described in our Privacy Policy. Where you choose to use optional cloud features (chat, cloud backup), that data is handled as described in the Privacy Policy, including retention and deletion periods.
8. Intellectual property
The Nocturn app, its design, branding and underlying software are the property of S. S. Dhillon. These Terms do not grant you any ownership rights in the app — only a personal, non-transferable, non-exclusive licence to use it on your own devices in accordance with these Terms.
9. Third-party services
Nocturn relies on third-party services, including Google Firebase, Google Cloud’s Gemini API, Google Play Billing, RevenueCat, Google Fonts and Unsplash. Your use of Nocturn is also subject to the applicable terms of these providers. We are not responsible for outages, changes or discontinuation of these third-party services that affect the app’s functionality.
10. Disclaimer and limitation of liability
Nocturn is provided “as is” and “as available”, without warranties of any kind, express or implied. We do not guarantee that the app will be uninterrupted, error-free, or that AI-generated content will be accurate. To the maximum extent permitted by law, our total liability to you for any claim arising from your use of the app is limited to the amount you paid us (if any) in the 12 months before the claim arose, and we are not liable for indirect, incidental or consequential damages, including any loss of data or decisions made based on AI-generated content.
11. Termination
You may stop using Nocturn at any time by uninstalling the app. We may suspend or terminate your access to the app if you breach these Terms. Sections relating to intellectual property, disclaimers, limitation of liability and governing law survive termination.
12. Changes to these Terms
We may update these Terms from time to time. If we make material changes, we will update the effective date above and, where appropriate, notify you inside the app. Continued use of Nocturn after a change takes effect means you accept the updated Terms.
13. Governing law
These Terms are governed by the laws of India. Any dispute arising from these Terms or your use of Nocturn is subject to the jurisdiction of the District Court, Sangrur, Punjab.
14. Contact
Questions about these Terms? Email singhsukhwinder519@gmail.com.