How do I get started?

Visit https://nanorhino.com/message and pick a channel. SMS is live in the US right now — text START to (915) 277-7888 and the AI replies in seconds. WhatsApp, iMessage, and Telegram are coming soon; you can leave your email on the same page to be notified at launch.

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 you text. Think of it as a personal AI nutritionist, AI dietitian, and AI calorie counter rolled into one — sent to you over SMS at (915) 277-7888. No app required. It provides personalized coaching, daily check-ins, photo-based meal logging, and emotional support throughout your weight-loss journey. 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 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.

Begin

Message your AI
weight-loss coach.
Pick a channel.

NanoRhino is your AI nutrition and weight-loss coach. SMS is live today at (915) 277-7888 in the US. WhatsApp, iMessage, and Telegram are coming soon — drop your email and we'll let you know the moment your channel opens up.

SMS

Available now

(915) 277-7888

text START to begin · US only

Open Messages

Coming soon

Coming soon. Get notified when it goes live.

iMessage

Coming soon

Coming soon. Get notified when it goes live.

Coming soon

Coming soon. Get notified when it goes live.

How to message NanoRhino, by channel

SMS — live now in the US

Text the word START to (915) 277-7888 from any US mobile phone. The AI replies in seconds with a short onboarding — no app to download, no account to create. SMS coaching is free for up to 50 messages per day; standard carrier message and data rates may apply. Reply STOP to unsubscribe at any time or HELP for assistance.

WhatsApp — coming soon

WhatsApp lets you message NanoRhino from anywhere in the world over Wi-Fi or mobile data. We're finishing the WhatsApp Business integration now. Leave your email above and we'll send a single notification the day it launches — nothing else.

iMessage — coming soon

iMessage delivers your NanoRhino conversations as encrypted blue-bubble threads on iPhone, iPad, and Mac. Photos and receipts arrive at full resolution, so meal logging is sharper than SMS. Join the iMessage waitlist above and we'll alert you on launch day.

Telegram — coming soon

Telegram support is for users who prefer a privacy-focused messenger with rich media and group support. The NanoRhino Telegram bot will offer the same coaching, photo calorie counts, and meal logging as SMS. Add your email above to be notified when it goes live.

Frequently asked questions

Which channel should I pick to message NanoRhino?

SMS is the only channel live today. Text START to (915) 277-7888 from any US phone and the AI replies in seconds. WhatsApp, iMessage, and Telegram are on the roadmap; pick the one you'd actually use and leave your email, and we'll notify you the moment that channel goes live.

What is NanoRhino's phone number?

NanoRhino's SMS number is (915) 277-7888. The service is US-only at launch. Text the word START to begin — no signup, no account, no app.

When will WhatsApp, iMessage, and Telegram be available?

We don't publish a fixed launch date, but if you join the waitlist on this page we'll email you the day your channel opens. Each channel will follow the same model as SMS: free until you lose weight, $10 per pound lost capped at $500 total.

Will my plan transfer when I switch channels?

Yes. Your coach remembers your goal, history, and preferences across channels once we ship them — you won't have to start over when iMessage, WhatsApp, or Telegram go live.

What information do you store from the waitlist form?

Only your email address, the channel you asked about, and a short traffic-source tag (if your link had one). We use it once — to notify you at launch — and never sell, share, or use it for advertising.

We'll only email you about the channel you picked. Reply STOP on SMS to unsubscribe; reply HELP for assistance. Standard carrier rates may apply.