AI nutrition, fitness & accountability coach, by textAI coach + real nutritionist, by text

A weight-loss coach that lives in your texts. And actually checks in.Doing everything right and the scale won't move?

Text a photo of your meal and get calories and protein back in seconds. Your coach tracks your meals, workouts and weigh-ins, nudges you when you go quiet — and a real nutritionist steps in when you're stuck.NanoRhino is a nutrition and accountability coach you text. Our members' real burn averaged ~500 calories a day below what calculators told them — so we measure yours from your own meals and weigh-ins, then coach you to it every day.

4 lba monthmedian weight loss for our members*
Get your Starting Plan

By text from (915) 277-7888 · US · No app · Pay only for results

Outside the US? Message us on WhatsApp

By texting START you agree to receive recurring coaching and reminder texts from NanoRhino (up to 50/day). Msg & data rates may apply. Reply STOP to opt out, HELP for help. Privacy · Terms

*Active members who log their meals, Jul–Sep 2026. Individual results vary.

A NanoRhino Starting Plan: the starting calorie target marked 'for reference', with the formula arithmetic shown line by line.

A real Starting Plan, sent by text

How it works

Two weeks to your real number.

  1. 01Today

    Get your Starting Plan.

    Enter your number, then answer a few quick questions by text. You get a starting calorie target, a protein floor, and the math behind it, line by line — a guide, not a rule, because formulas are averages, not you.

  2. 02Weeks 1–2

    Just log and weigh in.

    Don't change anything — eat as usual. Send a photo or one line for each meal, and weigh in Tuesday and Saturday mornings. I'll remind you.

    Real burn = calories you eat + weight you lose

    1 lb ≈ 3,500 calories

  3. 03Week 3

    Get your real plan.

    Your own logs and scale replace the formula: your measured burn, your real daily target — then I retune it every week as your body changes.

A member's first three months

−18.3 lb in 11 weeks, eating about 2,400 a day.

Joshuah, 46, 6′4″, no GLP-1. Logged every meal, weighed in most mornings — and his target came from his own measured burn, not the formula.

275285295305Aug 1Sep 1Oct 1
Every morning weigh-in he texted, Jul 16 – Oct 2, 2026 (lb).
298 → 279.7 lb in 11 weeks
−18.3 lb
298 → 279.7 lb in 11 weeks
days with meals logged
94 / 94
days with meals logged
weigh-ins
75
weigh-ins
measured daily burn — the formula said 3,633 (7% high)
3,396
measured daily burn — the formula said 3,633 (7% high)
“…a shirt of mine that is normally really snug fitting is now loose fitting on me … I can wear it again now, thank you for helping me with all of this”
Joshuah, Aug 9

Numbers from his own logs as of Oct 2, 2026. Shared with his permission; avatar illustrated. Individual results vary. Read his full story →

Why it works

Why I can help you lose weight.

  • Logging takes seconds.

    Snap a photo — I count calories & macros for you, 90%+ accurate in our tests.

    People who log daily lose about twice as much.¹

  • Your plan adjusts to you.U.S. patent-pending

    Every week I retune your target from your scale and logs.

  • A real nutritionist finds what's holding you back.

    When progress stalls, a human nutritionist — not just AI — digs into your meals, weigh-ins and habits to find the real cause, then gives you one specific fix.

  • I check in if you go quiet.

    Reminders at your meal times — you choose how often.

    Regular check-ins are core to proven weight-loss programs.²

  • Easy to stick with.

    Meal plans with foods you like, one small habit at a time.

    Sticking with it matters more than which diet you pick.³

Sources: ¹Hollis et al., Am J Prev Med 2008; ²Diabetes Prevention Program, NEJM 2002; ³Dansinger et al., JAMA 2005.

Our numbers

What we've measured — and how.

4 lb a month

Median loss

Across the 29 members whose burn we've measured (Jul–Sep 2026). 24 of the 29 lost weight; 5 didn't.

15% too high

How far off the formula was

Median gap between the standard formula and each member's measured burn, same 29 members (middle half: 4%–22%). It ran high for 24 of them.

90%+ accurate

Calorie counts from a photo

Average error of 5–10% against reference values in our internal tests of real meal photos.

How we measure burn: calories you log plus the weight you lose (1 lb ≈ 3,500 calories), over at least two weeks of meal logs and weigh-ins. Members counted are those who logged meals and weighed in; people who stop logging aren't in these numbers. Individual results vary.

In their words

What members text back.

  • “…a shirt of mine that is normally really snug fitting is now loose fitting on me … I can wear it again now, thank you for helping me with all of this”

    Joshuah· Aug 2026

Real texts from members, quoted as sent. Joshuah shared his name with permission; other names changed. Avatars are illustrations. Individual results vary. Read full conversations →

Who's behind it

Real people, in Houston.

NanoRhino is built by Link Heart Limited, an AI health technology company in Houston, Texas, founded by Vincent Xia (CEO) and Xiaomeng Li (CTO). The AI does the everyday coaching; a human nutritionist reviews members' meals and weigh-ins when progress stalls. The system that measures your burn and retunes your target is U.S. patent-pending.

About the company →|Contact support →

Your data

  • Encrypted in transit and at rest.
  • Never sold to data brokers, advertisers, insurers or anyone else.
  • Never used for ads — anywhere.
  • Deleted on request — all of it, no questions asked.

See our privacy policy. Reply STOP to any text to stop messages.

Results-based pricing

We get paid when you do.

Most weight-loss apps charge a subscription whether you lose weight or not. We're on your side of the scale: you pay only for pounds you actually lose — never twice for the same pound.

$10 per pound you lose.

Capped at $500. No results, no charge.

Get started

Outside the US? Message us on WhatsApp

No card to start.

Nothing upfront. You settle up only when a weigh-in crosses a 5-lb milestone — you pay at the moment you win.

The same pound never bills twice.

We bill only when you go below the lowest weight you've been billed at. If some comes back, re-losing it is free — you already paid for it once.

No progress, no charge.

No subscription, no monthly fee. Plateaus cost nothing — if you don't lose weight, you never pay a cent.

Capped at $500.

Even if you lose 80 lb, your total is capped at $500. Lose more, pay nothing more.

Want every detail — billing timeline, worked example, FAQ? Read the full pricing guide

Messaging NanoRhino is free for up to 50 messages per day. On SMS, standard carrier message and data rates may apply. Reply STOP to unsubscribe; reply HELP for assistance.

Questions

Things people often ask.

What is NanoRhino?
NanoRhino is an AI nutrition coach you text. You start with a Starting Plan — a calorie estimate that's a guide, not a rule. For the first 2 weeks you just log meals (a photo is enough) and weigh in twice a week; from that data we measure what your body really burns, and in week 3 you get your real plan, retuned every week after. When progress stalls, a human nutritionist looks at your data and gives you one specific fix. You pay only for results: $10 per pound you lose, capped at $500.
Why start with an estimate instead of a real number?
Every calorie calculator — ours included — is a formula built on population averages. For our members, formulas have run about 15% high on average, which is often the whole deficit. So we give you the formula's number as a starting reference, show you the math behind it, and then replace it with your measured burn: calories you eat plus the weight you lose (1 lb ≈ 3,500 calories), from two weeks of your own logs and weigh-ins.
Do I have to change how I eat in the first 2 weeks?
No. For the first 2 weeks, just eat as usual and log it — a photo or one line per meal — and weigh in Tuesday and Saturday mornings (you'll get a reminder). Your starting target is a guide, not a rule: getting close is great, but your normal eating is exactly what we need to measure your real burn.
What happens in week 3?
Once your scale has enough points (about three weigh-ins over two weeks), your coach calculates your real daily burn from your own logs and weigh-ins and sends your real plan: how your burn compares with the formula, and your new daily target. From then on the target is retuned every week as your body changes. If the data isn't there yet, your coach tells you exactly what's missing — usually one more weigh-in.
Is a real person involved, or is it all AI?
Day to day, your coach is AI — it answers in seconds, logs every meal, and checks in on you. When progress stalls, a human nutritionist reviews your meals, weigh-ins and habits to find the real cause and gives you one specific fix. NanoRhino is not medical care: we don't diagnose, prescribe, or replace your doctor.
How does pricing work?
You pay $10 per pound you lose, settled when a weigh-in crosses a 5-lb milestone, and your total is capped at $500. The same pound is never billed twice, and if the scale doesn't move, you pay nothing. No subscription, no upfront charge, no card to start.
I'm on a GLP-1 (Ozempic, Mounjaro, Wegovy, Zepbound) — does NanoRhino fit?
Yes. About 20% of our active users are on a GLP-1. NanoRhino is built to complement the medication, not duplicate it: the coach focuses on hitting protein (so you protect muscle on a suppressed appetite), staying hydrated, and adjusting calories as your weight comes down through dose changes. We don't medicate, prescribe, or give medical advice — your doctor stays in charge of dosing. We just help you eat well within whatever appetite you have on any given day.
Do I need an app? How do I start?
No app. In the US, text START to (915) 277-7888 — your coach asks a few quick questions and sends your Starting Plan by text. Outside the US, message us on WhatsApp instead.
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 (send or photo a plate in chat), 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.
Is NanoRhino private and secure?
Yes. NanoRhino is a private, judgment-free space — your conversations live in your messaging 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 do I unsubscribe?
Reply STOP at any time to unsubscribe. Reply HELP for assistance. You can re-enroll anytime by texting START again.

Begin

Get your Starting Plan.
Then let your data do the rest.

Enter your number and your coach texts you right away — a few quick questions, your Starting Plan by text, then two weeks of logging and weigh-ins turn it into your real plan.

Get your Starting Plan

Outside the US? Message us on WhatsApp.

No commitment. No subscription. No app to install.