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.

Honest comparison

NanoRhino vs a human dietitian

A registered dietitian (RDN) brings something an AI can't: a licensed clinician who can diagnose, treat medical conditions, and tailor a plan to your labs and history. For complex medical needs, that's genuinely the right call — and we'll say so. NanoRhino isn't a replacement for medical care. What it is, is an always-available coach you text between (or instead of) sessions, at a fraction of the cost, that only charges when you actually lose weight.

Text START to your coach

Pay only for results — $10 per pound lost, capped at $500.

Side by side

NanoRhino vs a human dietitian, honestly.

a human dietitian is a licensed registered dietitian (RDN) providing 1:1 nutrition consultations, in person or via telehealth. Typically $100–$300 for an initial session and ~$50–$150 per follow-up out of pocket as of 2026 (often $90–$200+ per hour); may be covered by insurance.

Feature and pricing comparison between NanoRhino and a human dietitian
Feature	NanoRhino	Human dietitian
What it is	AI nutrition coach you text (SMS)	Licensed registered dietitian (RDN)
Availability	Anytime — text whenever you need it	Scheduled appointments
Medical / clinical care	No — not medical advice; coaching only	Yes — licensed clinical expertise
Personalization	Remembers your goals, history & preferences	Deep, human, can use labs & medical history
Log a meal by photo	Yes — text a photo anytime	Reviewed at sessions (food diary)
Day-to-day accountability	Continuous — weekly check-ins, nudges	Between sessions you're on your own
Pricing model	Results-based: $10 per pound lost, capped at $500. No subscription, no upfront fee, no charge if you don't lose weight.	$100–$300 initial, ~$50–$150 per follow-up out of pocket (2026); insurance may apply
Charged only if you lose weight	Yes	No — paid per session regardless

Human dietitian pricing and features reflect publicly available information as of 2026 and may change. NanoRhino is not affiliated with a human dietitian.

No strawmen

Where each one wins.

Where a human dietitian wins

A licensed clinician who can diagnose and treat — essential for medical conditions, eating disorders, or labs-driven plans.
Deep, human personalization informed by your medical history and a real therapeutic relationship.
May be covered by insurance, and is the right choice when you need medical nutrition therapy.

Where NanoRhino wins

Always available — text the moment a craving or a hard day hits, not just at a scheduled appointment.
Continuous day-to-day accountability and weekly check-ins, not a plan you carry alone between sessions.
Dramatically lower cost: pay $10 per pound lost, capped at $500, versus per-session fees billed regardless of results.
Remembers everything you've told it, every time — no re-explaining your history each visit.

Questions

NanoRhino vs a human dietitian, answered.

Is NanoRhino a replacement for a registered dietitian?

No, and we won't pretend otherwise. A registered dietitian is a licensed clinician who can diagnose and treat medical conditions — if you have a medical issue, an eating disorder, or need a labs-driven plan, see an RDN. NanoRhino is a nutrition coach for everyday weight loss and accountability; it doesn't provide medical advice.

Why use NanoRhino instead of a dietitian?

Cost and availability. A dietitian typically runs $100–$300 for an initial session and roughly $50–$150 per follow-up out of pocket as of 2026, and you only have them at scheduled appointments. NanoRhino is there anytime you text, gives continuous day-to-day accountability, and only charges $10 per pound you actually lose, capped at $500.

Can I use both a dietitian and NanoRhino?

Absolutely — that's a great combination. Your dietitian sets the clinical strategy; NanoRhino keeps you accountable to it every day between sessions, logging meals and answering the small questions that come up when your dietitian isn't available.

Does NanoRhino remember my history like a dietitian does?

Yes — that's one of its strengths. NanoRhino remembers your goals, allergies, preferences, and past weeks, so you never re-explain yourself. A human dietitian also knows your history deeply, of course; the difference is NanoRhino has that context available the instant you text, at any hour.

How much does NanoRhino cost compared to seeing a dietitian?

NanoRhino charges $10 per pound you actually lose, capped at $500 total, with no subscription and no charge if the weight doesn't come off. A dietitian is paid per session regardless of whether you lose weight, which adds up over months of follow-ups.

Keep comparing

See how NanoRhino compares to others.

NanoRhino vs Cal AI NanoRhino vs MyFitnessPal NanoRhino vs Noom NanoRhino vs WeightWatchers NanoRhino vs TextCalio NanoRhino vs MacroFactor NanoRhino vs Lose It!NanoRhino vs Cronometer NanoRhino vs MealByMeal NanoRhino vs Simple NanoRhino vs ChatGPT

Or browse all NanoRhino comparisons.

Stop tracking. Start losing.

Text or photo your meal and let an AI coach handle the plan. You only pay when the weight is actually off — $10 per pound, capped at $500.

Text your coach

Not sure of your numbers yet? Start with the free TDEE calculator.