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 Noom

Noom is the closest comparison on intent — it's about behavior change, not just calorie math, and its psychology curriculum genuinely helps a lot of people. The honest difference is price and channel. Noom is a subscription you pay whether or not the scale moves, delivered through daily lessons in an app. NanoRhino is a coach you text — same behavior-change focus, but it lives in your Messages app and 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 Noom, honestly.

Noom is a psychology-based weight-loss program (daily lessons + tracking, optional coaching) in an app. Subscription — roughly $70/month month-to-month, dropping to about $17/month on an annual plan (~$209/year) as of 2026; Noom Med (GLP-1) costs more.

Feature and pricing comparison between NanoRhino and Noom
Feature	NanoRhino	Noom
What it is	AI nutrition coach you text (SMS)	Psychology-based program in an app
Behavior-change focus	Yes — coaching through cravings & setbacks	Yes — its core strength (psychology curriculum)
How you engage	Text your coach anytime	Daily in-app lessons + logging
Log a meal by photo	Yes — text a photo over SMS	Logging-focused; photo varies by plan
Human vs AI coaching	AI coach with persistent memory	Curriculum + optional human/group coaching
App / login required	No — lives in your Messages app	Yes — download + account
Pricing model	Results-based: $10 per pound lost, capped at $500. No subscription, no upfront fee, no charge if you don't lose weight.	Subscription (~$17–$70/mo depending on term, 2026), pay regardless of results
Charged only if you lose weight	Yes	No

Noom pricing and features reflect publicly available information as of 2026 and may change. NanoRhino is not affiliated with Noom.

No strawmen

Where each one wins.

Where Noom wins

A mature, well-researched psychology curriculum — Noom genuinely pioneered behavior-change-first weight loss.
Structured daily lessons and an established program many people find motivating.
Optional human and group coaching, plus a dedicated medication (GLP-1) track for those who want it.

Where NanoRhino wins

Same behavior-change focus, delivered as a conversation you text — no daily-lesson homework, no app.
An AI coach that remembers your context and is available the moment a craving or hard day hits.
Reliable calorie and macro math handled in code, not left to you.
Pay only for results: $10 per pound lost, capped at $500 — versus Noom's subscription you pay whether you lose weight or not.

Questions

NanoRhino vs Noom, answered.

Is NanoRhino a psychology-based program like Noom?

It shares the behavior-change goal — coaching you through cravings, setbacks, and hard weeks rather than just counting calories — but the delivery is different. Noom teaches through daily in-app lessons; NanoRhino coaches in a live text conversation whenever you need it, with no curriculum to keep up with.

How does the pricing compare to Noom?

Noom is a subscription — roughly $70/month month-to-month, or about $17/month on an annual plan (~$209 upfront) as of 2026 — billed whether or not you lose weight. NanoRhino charges $10 per pound you actually lose, capped at $500, with no subscription and no charge if the weight doesn't come off.

Does NanoRhino have human coaches like Noom?

NanoRhino's coach is AI, purpose-tuned to be a calm, non-judgmental nutrition coach with persistent memory of your goals and history. Noom offers optional human and group coaching. If a human coach is essential to you, that's a real point for Noom; if you want always-available coaching that remembers everything and costs nothing until you lose weight, NanoRhino is built for that.

I'm on a GLP-1 — which fits better?

Both work alongside GLP-1s. Noom has a dedicated, higher-priced Med track. NanoRhino complements the medication without duplicating it — the coach focuses on protein, hydration, and adjusting calories as your appetite and dose change, and we don't prescribe or give medical advice. Your doctor stays in charge of dosing.

Do I have to download an app?

No. Noom runs in its app. NanoRhino runs over SMS in your Messages app — text START to (915) 277-7888 to begin. An optional iOS app exists but isn't required.

Keep comparing

See how NanoRhino compares to others.

NanoRhino vs Cal AI NanoRhino vs MyFitnessPal NanoRhino vs WeightWatchers NanoRhino vs TextCalio NanoRhino vs a human dietitian 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.