How do I get started?

Start with the free TDEE calculator at https://nanorhino.com/tdee — a 5-minute AI interview (no app, no account) that gives you the calories you actually burn plus a starter plan. Then put it to work with a coach by text: SMS is live in the US at (915) 277-7888, with WhatsApp, iMessage, and Telegram coming soon. Already know your numbers? Text START to (915) 277-7888 to jump straight in.

Do I need to download an app?

No. SMS is the primary way to use NanoRhino — it lives in your Messages app. We also offer an optional iOS app for users who prefer it, but it's not required.

Is there a message limit? What does it cost to text?

NanoRhino SMS coaching is free for up to 50 messages per day. Standard carrier message and data rates may apply. If you exceed your daily free allowance, additional usage fees may apply — we'll always notify you before any charge.

How do I unsubscribe?

Reply STOP at any time to unsubscribe. Reply HELP for assistance. You can re-enroll anytime by texting START again.

What is Link Heart Limited?

Link Heart Limited is an AI health technology company based in Houston, Texas. We build NanoRhino, an AI-powered weight loss companion that provides personalized nutrition coaching with a unique pay-for-results model.

NanoRhino is an AI weight loss coach. Think of it as a personal AI nutritionist, AI dietitian, and AI calorie counter rolled into one. It starts with a free TDEE calculation, turns that into a personalized plan, and then coaches you by text at (915) 277-7888 — answering questions, logging meals you text or photograph, and adjusting as you go. No app required. You only pay $10 per pound you actually lose.

Is NanoRhino a free AI weight loss coach?

Texting NanoRhino is free for up to 50 messages per day, and you only pay if you actually lose weight — $10 per pound, capped at $500 total. There's no subscription, no upfront fee, and no charge if the weight doesn't come off. So functionally it's a free AI weight loss coach until you get results, then it's a results-based fee.

How does pay-for-results pricing work?

NanoRhino charges $10 per pound you lose, capped at $500 total. If you don't lose weight, you don't pay. This aligns our incentives with your success — we only succeed when you do.

Is NanoRhino private and secure?

Yes. NanoRhino is a private, judgment-free space — your conversations live in your Messages app. There are no social feeds, no posting, and no sharing. Your health data is encrypted, never sold, never shared with third parties, and never used for advertising. You can request deletion of all your data at any time.

How is NanoRhino different from other weight-loss tools?

Most apps make you tap through screens to log calories or follow generic meal plans. NanoRhino is a conversation: text a meal photo and get a calorie estimate back; vent about a hard day and get coached through it. It's like having a private nutrition coach on speed dial — at a fraction of the cost.

How is NanoRhino different from apps like MyFitnessPal or Cal AI?

Apps like MyFitnessPal and Cal AI are trackers — they tell you the calories in your meal and stop there. NanoRhino logs meals too (text or photo a plate over SMS), but the product is the coaching: it sets your targets, checks in weekly, explains why the scale moved, and adjusts your plan — and you only pay when you actually lose weight ($10 per pound, capped at $500). See the full breakdowns: NanoRhino vs MyFitnessPal, NanoRhino vs Cal AI, or browse all comparisons.

How is NanoRhino different from ChatGPT or other general AI assistants?

Three reasons. First, NanoRhino remembers everything you've told it — goals, allergies, last week's wins, your hard days. ChatGPT loses that context across conversations. Second, NanoRhino does the math reliably — calorie counts, macro targets, weekly weight-loss math — without the arithmetic slips a general model makes. Third, NanoRhino is purpose-tuned to be a non-judgmental coach. A general AI tries to be helpful, but it isn't designed to meet you consistently in cravings, shame, or setbacks the way a real coach should.

Where is Link Heart Limited located?

Link Heart Limited is headquartered in Houston, Texas, United States.

Privacy Policy

Last Updated: July 2026

1. Introduction

NanoRhino values your privacy and is committed to protecting your personal information. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our services. We comply with the General Data Protection Regulation (GDPR), the California Consumer Privacy Act (CCPA), and other applicable data protection regulations.

2. Disclaimer — No Medical Advice

For Educational and Informational Purposes Only

NanoRhino provides health, nutrition, and wellness education. We do not offer medical advice, medical nutrition therapy, or personalized treatment plans.

Not a Substitute for Professional Advice

You should consult qualified healthcare professionals for any health-related questions. Do not rely on NanoRhino's content as a substitute for professional medical guidance.

Use at Your Own Risk

The company disclaims responsibility for any consequences resulting from reliance on information provided through the service.

No Doctor–Patient Relationship

Using NanoRhino does not establish any professional-patient or doctor-patient relationship.

3. Scope of This Privacy Notice

This Privacy Notice applies to information collected through:

Our SMS/MMS text messaging coaching service
Our website and the free TDEE calculator
Electronic communications, such as text messages and emails

This notice does not cover third-party websites or services that may be linked from our platforms.

SMS / Text Messaging

When you provide your phone number and opt in to NanoRhino's SMS service, we use your number solely to deliver the AI nutrition coaching service, including conversational replies and scheduled meal-logging reminders. We do not sell, rent, or share your phone number with third parties for their marketing purposes. You may opt out of SMS at any time by replying STOP to any message. For questions, reply HELP or contact support@nanorhino.com.

4. Information We Collect

Phone Number & Contact Details

Your mobile phone number, and your email address if you choose to email us.

Message Content

The content of the SMS/MMS messages you send us, including any food photos you share for meal analysis.

Health & Progress Information

The weigh-ins, goals, dietary preferences, and health context you choose to share with your coach.

TDEE Calculator Inputs

The information you enter into our free TDEE calculator, such as age, sex, height, weight, and activity level.

Usage & Technical Data

Basic usage and analytics data, such as device type, approximate location derived from your IP address, and how you interact with our website.

5. How We Use Your Information

Provide and personalize our AI coaching, including processing your messages through AI and cloud service providers acting on our behalf
Track your progress and generate your weekly reports
Calculate and collect results-based fees for the weight you have lost
Send reminders and service updates
Operate, maintain, secure, and improve the Service
Comply with legal obligations

You can stop coaching messages at any time by replying STOP.

6. Data Sharing

We do not sell or rent your personal data. We may share limited information with:

Service Providers

Providers who deliver our text messages, host our cloud infrastructure, and process your messages with AI — all acting on our behalf and under contractual confidentiality and security obligations.

Analytics

Privacy-respecting analytics providers (such as Google Analytics) that help us measure how our website is used. We do not engage in user-level advertising tracking.

Legal Requirements

When mandated by law, regulation, or court order.

Business Transfers

In the event of an acquisition, merger, or reorganization.

All third-party providers are contractually obligated to comply with applicable privacy laws.

7. Data Retention

We retain your information only as long as necessary to fulfill the purposes outlined in this policy, or as required by law.

8. Data Security

We implement reasonable safeguards to protect your information against unauthorized access, loss, or alteration. However, no method of transmission or storage is completely secure, and we cannot guarantee absolute security.

9. Your Rights

Depending on your location, you may have rights under the GDPR, CCPA, or other data protection laws, including:

Access to your personal data
Correction of inaccurate data
Deletion of your data
Restriction of processing
Opt-out of communications

To request access to or deletion of your personal data, email us at support@nanorhino.com.

10. Cookies & Tracking

We use cookies and similar technologies to improve your experience, analyze traffic, and deliver personalized content.

11. Children's Privacy

Our services are not directed to children under the age of 13 (or 16 in the EU). We do not knowingly collect personal data from children. If you believe we have collected information from a child, please contact us for deletion.

12. Changes to This Notice

We may update this Privacy Policy periodically. Material changes will be communicated by text message or through a notice on our website.

13. International Data Transfers

Your data may be processed and stored internationally. Where required, we implement appropriate safeguards to protect your information during transfer.

14. Contact Information

If you have questions about this Privacy Policy, please contact us:

Email: support@nanorhino.com

Address: 623 Airybrook Ln, Houston, TX 77094, United States