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 MyFitnessPal

MyFitnessPal is the calorie-logging standard — a 14-million-plus food database built over a decade of users. If your goal is to look up any food and log it, nothing beats it. But logging isn't losing. NanoRhino is the coach on the other side of the number: text or photo your meal, and it tells you what to eat next, hits your protein, and adjusts the plan — and only bills you when the weight is actually off.

Text START to your coach

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

Side by side

NanoRhino vs MyFitnessPal, honestly.

MyFitnessPal is a calorie- and macro-logging app with the largest food database (14M+ entries) and a barcode scanner. Free tier (capped at 5 food entries/day as of 2026); Premium around $19.99/month or $79.99/year; Premium+ higher.

Feature and pricing comparison between NanoRhino and MyFitnessPal
Feature	NanoRhino	MyFitnessPal
What it is	AI nutrition coach you text (SMS)	Calorie-logging app + food database
Food database / barcode scan	AI estimates from text or photo	Best in class — 14M+ foods, barcode scanner
Coaching & accountability	Yes — plans, check-ins, replanning	No — you log and self-manage
Effort to log	Text it in words or a photo	Search/scan and tap through screens
Free tier	Free for up to 50 messages/day	Free, but capped at 5 entries/day (2026)
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 (~$19.99/mo or ~$79.99/yr Premium, 2026), pay regardless of results
Charged only if you lose weight	Yes	No

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

No strawmen

Where each one wins.

Where MyFitnessPal wins

The largest food database anywhere — regional dishes, small-restaurant items, obscure ingredients no competitor covers.
A free barcode scanner and database that aren't paywalled — great for precise lookups.
Deep integrations and years of logged history if you're already invested in it.

Where NanoRhino wins

A coach, not a log — it acts on your numbers instead of just storing them.
Lower friction: text what you ate (or a photo) instead of searching a database and tapping through screens.
No app, no account — it's a text thread.
Pay only for results: $10 per pound lost, capped at $500 — versus a subscription you pay whether the scale moves or not.

Questions

NanoRhino vs MyFitnessPal, answered.

Does NanoRhino have a food database like MyFitnessPal?

Not in the same way. MyFitnessPal's edge is its 14-million-plus food database and barcode scanner. NanoRhino estimates calories and macros from what you text or a photo of your plate, then coaches you on the result. If precise database lookups matter most to you, MyFitnessPal wins there; if you want a coach who acts on the numbers, NanoRhino is built for that.

Is NanoRhino cheaper than MyFitnessPal Premium?

They price differently. MyFitnessPal Premium is roughly $19.99/month or $79.99/year as of 2026, billed whether or not you lose weight. NanoRhino charges $10 per pound you actually lose, capped at $500, with no subscription — so you pay nothing until the weight is off.

I already log in MyFitnessPal. Why add a coach?

Because logging is the part most people can already do — the part that stalls is what to do when the scale won't move, what to eat to hit protein, and how to handle a hard week. That's the coaching NanoRhino adds. You can keep logging in MyFitnessPal and let NanoRhino handle the strategy and accountability.

Is logging by text really easier than an app?

For many people, yes. MyFitnessPal asks you to search the database, pick the right entry, and set a portion. NanoRhino lets you write "two eggs and toast" or send a photo, and it estimates from there — then keeps coaching in the same thread.

Is my data private with NanoRhino?

Yes. Your conversations live in your Messages app, your health data is encrypted, never sold, never shared with third parties, and never used for advertising, and you can request deletion at any time.

Keep comparing

See how NanoRhino compares to others.

NanoRhino vs Cal AI NanoRhino vs Noom 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.