Comparison

Built With Science+ vs Carbon Step

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Built With Science+

This intelligent fitness companion offers personalized workout plans and nutrition advice based on scientific insights. It adapts to your progress with real-time feedback, providing guidance for continuous gains and informed health decisions.

Highlights
  • Hyper-Personalized Workouts
  • Progressive Overload Guidance
  • Real-Time Diet Adjustments
  • AI-Powered Meal Scanner
  • 250+ Exercise Tutorials
  • Daily Knowledge Boosters
  • AI Fitness & Nutrition Assistant
Features
Read full description

Reach your goals faster with BWS+ all-in-one fitness coach. Frustrated with cookie-cutter workout plans and confusing nutrition advice? BWS+ is your intelligent coach and complete fitness companion for achieving the body you've always wanted. The app integrates insights from leading fitness scientists, coaches, and dietitians, offering personalized advice based on your unique body and goals. It evolves with you, adapting your workouts and nutrition based on real-time feedback, encapsulating decades of experience into a dynamic coach that tailors itself to your needs. The latest science, personalized to you - Hyper-Personalized Workouts: Built with Science's advanced algorithm creates a workout plan specifically for your body, goals, and schedule. Whether you're hitting the gym or training at home, we've got you covered. - Progressive Overload Guidance: Never plateau again. BWS+ tells you exactly how to adjust your weights and reps each session for continuous gains. - Real-Time Diet Adjustments: As your body changes, so do your nutritional needs. Our app adapts your meal plan weekly, ensuring you're always on track. All-in-One Fitness and Nutrition Solution - 250+ In-Depth Exercise Tutorials: Master proper form with our detailed video guides, packed with science-based insights. - AI-Powered Meal Scanner: Say goodbye to tedious calorie counting. Simply snap a photo of your meal, and our AI does the rest, accurately tracking your nutrition in seconds. - Daily Knowledge Boosters: Unlock 200+ bite-sized lessons to build your fitness IQ and make informed decisions about your health. One App is All You Need - AI Fitness & Nutrition Assistant: Get personalized answers to your fitness and nutrition questions, as if you're talking directly to Jeremy Ethier. - Muscle Group Prioritizer: Focus on specific muscles that need extra attention for balanced development. - Recomp Detector: Track simultaneous fat loss and muscle gain with our advanced body composition analysis. - Step Tracking and Daily Activity Goals: Seamlessly integrate with Apple Health and Google Fit to optimize your overall activity levels. We've combined cutting-edge technology with years of scientific research to create an app that delivers real, lasting transformations. No more guesswork, no more wasted time in the gym. BWS+ provides the structure and guidance you need to finally achieve the body you deserve. Download now and take the first step towards the best version of yourself! This app requires an active BuiltWithScience+ membership or an in-app subscription purchased through the App Store to access its features and content. Subscription details and terms are available within the app.

About

Carbon Step

Features
Read full description

Carbon Step helps you estimate emissions from daily activities (walking, cycling, transit, driving), home energy (electricity/natural gas), food and shopping. Optionally integrates with HealthKit for steps/distance. Set personal goals, receive reminders and tips, and track your progress over time. Highlights: • Simple logging, some automatic capture • Goals, notifications, reduction tips • Local database + optional cloud sync • Turkish and English support • Privacy-first design Make your footprint visible and build sustainable habits.

Screenshots

Built With Science+4 screens
Carbon Step4 screens

Verdict

The call

The clearest difference is in-app purchases: Carbon Step at none against Built With Science+'s 4. Built With Science+'s advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Built With Science+ sells 4 in-app purchases, starting at $29.99 per month. Carbon Step asks for nothing beyond the download.

UpkeepUpdate frequency

Built With Science+ ships an update every 2 weeks, Carbon Step every 9 days. The most recent releases landed on September 25, 2026 and June 5, 2026 respectively.

Scorecard2 real differences · 8 level
Built With Science+ versus Carbon Step: the parameters behind the verdict, then further details
ParameterBuilt With Science+Carbon Step
PriceFreeFree
Rating4.8 (3.9K ratings) — better—
Positive reviews79.8% of reviews—
Number of ratings3.9K — better—
Update frequencyEvery 2 weeksEvery 9 days — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationSubscription—
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS16.2 — better17.6
Further details — not scored
Size233 MB45 MB
Age rating4+4+
DeveloperBuilt With Science Holdings CorpMert Huseyin Ciloglu

Bugs and requests

Built With Science+

Reported bugs

4 issues
  • Workout data sometimes gets lost or marked incomplete
  • App takes a long time to open
  • Login and sign-up issues for existing customers
  • Inconsistent exercise recommendations and adjustments

Requested features

5 requests
  • Add ability to create and save custom recipes
  • Integrate with Apple Health and other fitness platforms
  • Provide more flexibility in workout scheduling
  • Enhance human coaching and support features
  • Improve performance and stability

Carbon Step

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

Built With Science+

Subscriptions2
  • Monthly Membership14 Days trial$29.991 Month
  • Annual Membership14 Days trial$189.001 Year
One-time2
  • Intermediate Program Unlock$49.00
  • Beginner Program Unlock$49.00
None

Carbon Step

No in-app purchases

Questions

Is Built With Science+ free?
Built With Science+ is free to download, with in-app purchases available.
Is Carbon Step free?
Carbon Step is free to download, with no in-app purchases.
Do Built With Science+ or Carbon Step have ads?
Carbon Step shows ads; Built With Science+ does not.
Which is updated more often, Built With Science+ or Carbon Step?
Built With Science+ ships an update every 2 weeks, and Carbon Step every 9 days. Most recently, Built With Science+ was updated on September 25, 2026 and Carbon Step on June 5, 2026.

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