The short answer: choose NextWeigh if you want the smallest possible daily nudge. It sends two automated SMS messages a day, a morning plan and an evening check-in, to any phone with a US or Canadian number, and it asks for a YES or a NO back. It costs $29.95 a month with no app and nothing to log. Choose BodyBuddy if you want a coach that texts you every day and keeps track of the specifics: the plan your doctor or dietitian handed you, the meals you photograph, the medication schedule, and the steps and sleep Apple Health already records. It costs $29 a month after a 7-day free trial and runs over iMessage on an iPhone.

Neither service replaces a clinician, a dietitian, or a trainer. NextWeigh says so in the footer of every page, and BodyBuddy is not medical care and does not replace your doctor or dietitian either. The useful question is what happens after you have a plan: who texts you about it tomorrow, what they know about your day, and how much you have to type back.

BodyBuddy vs NextWeigh at a glance

ㅤ	NextWeigh	BodyBuddy
What it is	Automated accountability texts, two a day	AI health coach that texts you every day
Who writes the texts	A "smart, automated system," per their About page	AI, with no humans behind the chat
Platform	SMS on any phone; US and Canadian numbers	iMessage on iPhone, plus an iOS app and a web app; no Android
What a day looks like	A morning plan, an evening check-in, a one-word reply	An open thread: meals, workouts, sleep, questions, check-ins
Follows a plan from a doctor or dietitian	Not on their public pages; the plan comes from a two-minute onboarding survey	Yes; a photo or PDF of any plan becomes the daily plan
Records a doctor visit	Not on their public pages	Yes, with everyone's okay; it summarizes the visit and folds the instructions into the texts
Tracking	No calorie or macro logging by design	Photo meal logging for calories, protein, and carbs; Apple Health for steps, workouts, sleep, and weight
Medication	No medication feature on their public pages	Carries a medication schedule and shot days in the daily texts; logs a dose from a reply
Price	$29.95 per month, billed at checkout	$29 per month
Free trial	None	7 days
Who it is for	People who want a nudge with nothing to install and nothing to log	People with a plan to follow, or several, who want one thread that keeps track of all of it

The real difference: a nudge vs a coach that keeps track

NextWeigh is a deliberately small product, and its own pages are candid about that. The What is NextWeigh page describes "a personalized accountability service delivered through text messages" where members "receive a realistic morning plan and an evening check-in based on their goals, schedule, and coaching preferences." A two-minute survey asks your goal, why it matters, what a typical day looks like, and your morning and evening times. The example morning text on the homepage reads "Today's focus: take a 15-minute walk after lunch and add protein to your plate. Reply DONE when you've got it." The evening one asks "Did you hit your protein goal and take that 10-minute walk today? Reply YES or NO."

The coach is a program. Their About page says "We use a smart, automated system to ensure your texts arrive exactly when you need them, tailored to your specific schedule and goals. This ensures 100% reliability without the high cost of a 1-on-1 human coach." The public pages do not say whether a language model writes each message or whether the messages come from templates, so I will leave that open. Nobody is reading your replies in real time, and the service does not pretend otherwise.

NextWeigh also publishes a list of who it is not for: "People who want detailed calorie or macro tracking," "Those seeking medical, nutritional, or clinical guidance," and "Anyone wanting a full fitness app with dashboards." The terms of service add "periodic meal and movement nudges" and "optional weekly recaps." That is the whole product, and the founder, Jared Casper, frames it as the friend who used to text "let's go" before the gym.

BodyBuddy is a coach, and the texts carry more. It is an AI, with no humans behind the chat, and it texts you every day over iMessage. The difference shows up the moment you have a plan from someone else. You upload a photo or PDF of a doctor's instruction sheet, a dietitian's meal plan, or a trainer's program in the app, and it becomes the daily plan BodyBuddy texts you about (the import guide walks through it). You can record a doctor's appointment in the app, with everyone's okay, or send a Voice Memos recording; it summarizes the visit and folds the instructions into the texts. The post-op recovery page shows what that looks like over a few weeks.

The texts also know your day. Text BodyBuddy a photo of lunch and it logs calories, protein, and carbs. Connect Apple Health once and it sees steps, workouts, sleep, and weight. So the evening message is less "did you walk?" and more "you're at 4,100 steps and 60 grams of protein, want to get a walk and some eggs in before 9?" It checks in when you go quiet and sends a weekly recap. NextWeigh asks you one question a night. BodyBuddy has a conversation with you.

Where NextWeigh is better

1. It works on any phone that can receive a text

NextWeigh is SMS only, and the FAQ on their homepage says "If you can receive texts, you can use NextWeigh." That covers Android, a flip phone, and a work phone with no app store. The About page notes the service is "optimized for US and Canadian phone numbers." BodyBuddy coaches over iMessage, so it needs an iPhone, and there is no Android app.

2. It asks almost nothing of you

Two texts a day and a one-word reply is the whole commitment. There is no meal to photograph and no app to open. NextWeigh's homepage FAQ says that if you ignore a text "there's no red streak, no annoying notifications, and no guilt trip." If logging is the reason every other app died on your phone, this is the lowest floor on the market.

3. It keeps very little of your data

NextWeigh's privacy policy lists what it collects: name, email, phone number, survey answers, SMS replies, and billing handled by a third-party processor. There are no photos, health records, or recordings, because the product never asks for them. BodyBuddy holds meal photos, Apple Health data, and optional appointment transcripts, since that is what the coaching runs on. If you want a daily nudge with the smallest footprint, NextWeigh has it.

Where BodyBuddy is better

1. It follows the plan you already have

A plan from a doctor, a dietitian, or a trainer is the thing most people are trying to stick to, and NextWeigh's public pages show no way to take one in. Its plan comes from a survey, and its terms say it does "not provide personal training, nutritional planning, medical supervision, clinical counseling, or any form of licensed healthcare." BodyBuddy is not a substitute for those professionals either, but it will take the sheet they gave you, text you each day to help you follow it, and answer questions from your own sheet.

2. The check-in knows what you actually did

NextWeigh's evening text asks whether you hit your protein goal, and you answer on the honor system. BodyBuddy already logged the protein when you texted a photo of lunch and already saw the steps in Apple Health, so the night question comes from your real numbers and the next morning's plan adjusts to them.

3. You can ask it things

NextWeigh is built around YES, NO, DONE, or a brief note. BodyBuddy's pricing card includes "Unlimited texting with your coach, 24/7." You can text it "slept five hours, should I still lift tonight?" and get a reply that uses what it knows about you. A medication schedule and shot days live in the same thread; reply to the text and the dose is logged. It is a coach rather than a pill-alarm app, so if all you want is an alarm, a reminder app is simpler.

4. You can try it before you pay

BodyBuddy has a 7-day free trial. NextWeigh has none; billing starts at checkout.

Pricing: $29.95 with no trial vs $29 with one

As of October 2026, NextWeigh costs $29.95 USD per month, billed at checkout, with no free trial. You cancel by replying STOP to any text or emailing support. Their terms say cancellations take effect at the end of the billing period, with no refunds for partial periods unless the law requires it.

As of October 2026, BodyBuddy costs $29 per month after a 7-day free trial, and you can cancel anytime. The two are 95 cents apart, so price should not decide this one.

Privacy: what each service keeps, and the recording line

NextWeigh's privacy policy, last updated June 11, 2026, says the service collects contact details, survey responses, SMS replies, and billing information, stores your number "in our secure CRM system," and shares data with "SMS messaging platforms, CRM software, payment processors, and analytics tools." It says "We do not sell your personal information." Subscriber data is kept for the length of the subscription plus three years, consent records for at least five, and deletion requests are honored within 30 days where the law allows.

BodyBuddy's privacy policy covers more because the product holds more: message history, meal photos, Apple Health data you grant, imported documents, and optional appointment recordings with their transcripts. It says "We do not sell your personal information." Messages run through AI providers (including OpenAI, Anthropic, Google, and DeepSeek) and the iMessage thread runs through Linq. Raw appointment audio is deleted once the transcript is stored, and recordings, transcripts, and imported medical documents are not used to train AI models. BodyBuddy states that it is not a HIPAA covered entity, and account deletion removes your data from active systems within 30 days.

Only BodyBuddy records anything, and only when you choose to. The recording screen asks you to confirm you are a participant in the appointment and have the consent the people in the room require. Ask before you press record; consent laws vary by state.

Which one should you choose?

Choose NextWeigh if:

You want two short texts a day and nothing else to do.

You are on Android, or you do not want another app on your phone at all.

Logging meals is the reason past apps failed, and you want a product that never asks.

You want the smallest possible data footprint for a daily nudge.

Choose BodyBuddy if:

You have a plan from a doctor, dietitian, PT, or trainer and want help following it every day.

You want the check-in to use what you actually ate and what Apple Health recorded.

You want to ask questions, send a photo of dinner, or keep a medication schedule in the same thread.

You have an iPhone and want to try it free for a week first.

Frequently asked questions

Which is better for a virtual health coach that texts me every day, NextWeigh or BodyBuddy?

Both text you every day; the difference is what the texts carry. NextWeigh sends an automated morning plan and an evening YES or NO check-in. BodyBuddy is an AI coach that follows a plan you upload, logs meals from photos, reads Apple Health, and answers questions. Pick NextWeigh for the lighter touch and BodyBuddy for the one that keeps track.

Is NextWeigh a real person or a bot?

NextWeigh's About page describes "a smart, automated system" and contrasts it with "the high cost of a 1-on-1 human coach," so the texts are automated; the pages do not say whether a language model writes them. BodyBuddy is an AI coach with no humans behind the chat, and it says so plainly.

Does NextWeigh work on Android?

Yes. NextWeigh is SMS only, so any phone with a US or Canadian number that can receive texts works. There is no app to install on either platform.

Does BodyBuddy work on Android?

No. BodyBuddy coaches over iMessage and has an iPhone app and a web app, with no Android app as of October 2026.

Can BodyBuddy follow a plan from my doctor or dietitian?

Yes. Upload a photo or PDF of the plan in the app and it becomes a daily plan BodyBuddy texts you about, and it answers questions from your own sheet. BodyBuddy is not medical care and does not replace your doctor or dietitian.

Does NextWeigh have a free trial?

No. NextWeigh's own FAQ says "There is no free trial," and billing starts at checkout at $29.95 a month. BodyBuddy offers a 7-day free trial before $29 a month.

Can I use both?

You could, though you would get two check-ins a night asking about the same walk. If an honor-system YES is enough to keep you moving, NextWeigh is lighter to live with. If you need the coach to know what you ate and what the doctor said, BodyBuddy is the one doing that work.

Sources checked

NextWeigh homepage (two texts a day, $29.95/mo, example messages, FAQ)

What is NextWeigh (SMS only, no free trial, who it is not for, founder)

NextWeigh about page (founder story, "smart, automated system," US and Canadian numbers)

NextWeigh press page (facts for reporters)

NextWeigh terms of service (service description, cancellation terms)

NextWeigh privacy policy (data collected, sharing, retention)

NextWeigh: SMS vs app fitness tracking (their case against apps)

NextWeigh compare page (flat pricing)

BodyBuddy (pricing card, features)

BodyBuddy privacy policy (data, AI providers, HIPAA status, recording consent)

How to import a plan into BodyBuddy

BodyBuddy post-op recovery

BodyBuddy vs AlignCare (related comparison)

BodyBuddy vs NextWeigh (2026): Two Health Coaches That Text You Every Day