Disclosure: This comparison is published by the creators of BodyBuddy. We have tried to describe Simple fairly and link to its current documentation so you can verify the details yourself.

Simple and BodyBuddy can both help you pay attention to food, movement, weight, and daily habits. The experience is very different, though.

Simple is strongest as a structured weight-loss app. It combines intermittent-fasting tools, food and water logging, educational content, progress tracking, and an AI coach named AVO inside a traditional app.

BodyBuddy is strongest as a proactive health accountability coach. BodyBuddy texts you, helps you follow plans you already have, and stays involved across meals, movement, sleep, appointments, and everyday health decisions.

The short version:

Choose Simple if you want an app-led weight-loss program built around fasting, logging, scores, and lessons.

Choose BodyBuddy if you want a coach who reaches out by text and helps carry your health plans into daily life.

BodyBuddy vs Simple at a glance

Category	Simple	BodyBuddy
Core experience	Structured weight-loss app	Proactive health coaching by text
AI coach	AVO, inside the Simple app	BodyBuddy, primarily through text message
Food logging	Text, photo, and manual editing	Natural conversation, photos, voice messages, corrections, and meal planning
Nutrition feedback	Meal analysis, nutrition breakdowns, and personalized feedback	Calorie and protein estimates plus coaching that can use the context of the conversation
Intermittent fasting	A central product strength	Can support a fasting plan, but it is not the center of the product
Daily structure	In-app plans, check-ins, scores, and lessons	Proactive conversations and reminders based on your plans and recent context
Professional plans	Primarily Simple's own program	Can organize and follow a plan from a doctor, dietitian, trainer, therapist, or other professional
Doctor appointments	Not a primary workflow	Record a visit or import an after-visit summary, review the result, and turn approved instructions into a plan
iPhone experience	Traditional app experience	Text-native coaching, with meal progress visible in the Dynamic Island while you are actively texting
Platforms	iPhone and Android	iPhone app, plus web
Free access	Basic tracking is available without Premium	Free trial, then a paid membership

What Simple offers in 2026

Simple has grown well beyond a fasting timer.

Its current product includes fasting schedules, meal and water logging, movement and weight tracking, personalized plans, educational content, and the AI coach AVO. You can describe a meal in text or photograph it with AVO Vision. Simple then creates an editable food entry with a nutrition breakdown and feedback.

Simple also uses a Success Score to turn several behaviors into one visual progress signal. Food quality, hydration, activity, fasting, weigh-ins, and daily check-ins can all contribute. The app's Blinky character adds another layer of encouragement and gamification.

That is a coherent product for someone who wants to open an app, follow a structured program, and see progress represented through scores and streaks.

What BodyBuddy offers

BodyBuddy is a health accountability coach that communicates by text.

You can tell BodyBuddy what you ate, send a photo, share a voice message, record movement, discuss sleep, or work through a decision. BodyBuddy can follow up later instead of waiting for you to remember to open an app.

BodyBuddy can also help you use plans that came from somewhere else. You can bring in instructions from a doctor, dietitian, trainer, physical therapist, health coach, or a program you chose yourself. You review the extracted information before it becomes part of a plan.

This makes BodyBuddy less like a single weight-loss program and more like a layer of follow-through across your health.

The biggest difference is where accountability happens

Simple organizes the experience inside the Simple app. You open it to log, learn, check a score, talk with AVO, or manage a fasting window.

BodyBuddy brings the experience into the conversation you already use. It can text first, ask how a meal went, or help adjust a plan when real life changes.

That distinction matters when you already know what to do and the hard part is doing it on a normal Tuesday.

A program can be excellent and still fail when it lives behind an app icon. BodyBuddy is designed to keep the plan present without requiring you to repeatedly restart the process yourself.

Food logging: both use AI, but the workflows feel different

Simple's food logging is capable and visual. You can type a meal, scan it with the camera, inspect the resulting entry, and edit the details. It is a good fit if you like a familiar app-based food diary with analysis attached.

BodyBuddy treats the conversation itself as the interface. You can say:

“I ate half and saved the rest for dinner.”

“That was closer to two cups of rice.”

“I am going to CAVA later. Help me find something with about 40 grams of protein.”

“This is the same shake I had yesterday.”

BodyBuddy turns those sentences into log entries and corrections. The precision scales with the information you provide. A measured portion or nutrition label can produce a precise entry. A casual description can stay appropriately high level while the conversation focuses more on choices, patterns, and how you felt.

On compatible iPhones, BodyBuddy also keeps calorie and meal progress in the Dynamic Island while you are actively texting. That creates a persistent heads-up display during the conversation without asking you to switch into a separate tracker.

Simple is stronger for intermittent fasting

If intermittent fasting is the main reason you are choosing an app, Simple has the clearer advantage.

Fasting schedules, timers, eating windows, and related guidance are part of Simple's core experience. The product is designed to make that method visible and easy to follow.

BodyBuddy can help you follow a fasting plan, including one provided by a qualified professional, but it is not a dedicated fasting app. Its value is broader accountability and adaptation around the plan.

BodyBuddy is stronger when your health spans several plans

Most people do not experience health as one clean program.

A doctor may ask you to schedule a follow-up. A physical therapist may give you exercises. A dietitian may change your breakfast target. A trainer may adjust your workouts. You may also be trying to sleep more consistently or remember a medication question for your next visit.

BodyBuddy can hold those threads in one continuing relationship and help you act on them over time.

The BodyBuddy app also supports recording a doctor appointment, importing written instructions, and organizing the parts you approve into a plan. BodyBuddy is not medical care and does not replace a qualified professional. The point is to reduce the friction around reaching professional care and following the advice you receive.

How the coaching styles differ

Simple's coaching is closely connected to its program. AVO can explain fasting, respond to logs, provide feedback, and help you interpret your progress inside the app.

BodyBuddy's coaching is designed to feel like an ongoing relationship. It has context from the conversation, can initiate a check-in, and can help with what happens between formal plans and appointments.

Choose the style that matches the problem you actually have:

If you want a defined program to follow, Simple may feel clearer.

If you already have plans but struggle to carry them into real life, BodyBuddy may feel more useful.

If you want your coach to reach out before you remember to ask, BodyBuddy is the more natural fit.

Pricing and access

Simple offers basic tracking without Premium. Its Premium plans add features such as personalized guidance, advanced progress tools, educational content, and access to AVO. Simple says prices vary by plan length and are shown during checkout.

BodyBuddy is $29 a month after a 7-day free trial, billed on the website.

Because subscription offers change, check each product's checkout screen before deciding.

Choose Simple if

Intermittent fasting is central to the approach you want.

You prefer a structured app with scores, lessons, and a visible program.

You want a native Android app.

You want basic tracking before committing to Premium.

You enjoy gamified progress signals such as a daily score or companion character.

Choose BodyBuddy if

You want a coach who can proactively text you.

You want help following plans from multiple professionals.

You want food logging to work through ordinary conversation, photos, and voice messages.

You want accountability that extends beyond weight loss.

You want appointment instructions integrated into daily life.

You use an iPhone and value the iMessage and Dynamic Island experience.

Can you use both?

Yes.

Someone may use Simple for a fasting protocol and BodyBuddy for broader accountability. You can tell BodyBuddy about the fasting schedule you are following and use the conversation to work through meals, energy, workouts, appointments, and the rest of your health.

The overlap is real, but the products do not have identical jobs.

The bottom line

Simple is a strong choice for someone who wants a structured weight-loss app with intermittent fasting, food analysis, progress scores, and an in-app AI coach.

BodyBuddy is the stronger choice for someone who wants proactive, text-native accountability across their entire health. It is especially useful when the hard part begins after you already have a plan.

If your main question is “Which program should I follow?”, start with Simple.

If your main question is “How do I make the plans I already have survive real life?”, choose BodyBuddy.

Try BodyBuddy on iPhone

Frequently asked questions

Is Simple only a fasting timer?

No. Simple now includes food and water logging, movement and weight tracking, personalized plans, nutrition feedback, progress scores, educational content, and the AI coach AVO. Fasting remains a major part of the product, but describing it as only a timer is outdated.

Does Simple have an AI coach?

Yes. Simple's AI coach is called AVO. It can answer questions, provide feedback, and support the program inside the Simple app.

Can BodyBuddy support intermittent fasting?

BodyBuddy can help you follow and discuss a fasting schedule, but it is not a dedicated fasting timer. If detailed fasting windows are your main need, Simple is more specialized.

Which app is better for food logging?

Simple is a good fit if you want an app-based log with photos, editable entries, nutrition analysis, and scores. BodyBuddy is a better fit if you want to log and correct food through natural conversation and combine tracking with proactive coaching.

Which app is better for following a doctor's or dietitian's plan?

BodyBuddy is designed for this use case. You can import or record instructions, review what was extracted, and use the approved plan in daily coaching. BodyBuddy does not provide medical care or replace the professional responsible for your care.

Is BodyBuddy available on Android?

The text coaching runs over iMessage, so it needs an iPhone. The web app works on anything. Simple supports both iPhone and Android.

Sources

Simple: How to log and edit food

Simple: Premium features and cancellation

Simple: How calibration works

Simple: Understanding the Success Score

Simple: What is Blinky?

Simple: Supported devices

BodyBuddy privacy policy

Simple App Alternative: BodyBuddy vs Simple (2026)