Comparison

Built With Science+ vs Pillar

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

Pillar

Features
Read full description

PILLAR — BUILT FOR LIFTERS. Pillar is the workout tracker that actually understands strength training. Log your lifts in seconds, see exactly how your body is recovering, and follow plans that adapt to you. No fluff. No gimmicks. Just smarter training and real results. TRACK EVERY REP Logging shouldn't slow you down. Tap to record sets, reps, and weight mid-workout with a clean, fast interface designed for the gym floor. Follow along with detailed anatomical exercise animations so you always know exactly which muscles you're targeting — and how to hit them right. ● Log sets and reps in two taps ● 3D anatomical animations for every exercise ● Rest timers built into every set ● Instant PR detection and volume tracking SEE EVERY GAIN Powerful insights into your strength and performance. Pillar charts your estimated 1-rep max for every lift, so you can watch your progress climb week over week — across your key lifts and everything else. ● e1RM progression charts for every exercise ● Track key lifts: squat, bench, deadlift, and more ● View trends across 1 week to all time ● Weekly performance summaries RECOVER BETTER Most apps track what you did. Pillar tracks how your body responded. Get a muscle-by-muscle recovery map — see which muscle groups are sore, which are recovering, and which are ready to be trained hard again. ● Recovery status for every major muscle group ● Know when to push and when to rest ● Balance stimulus, recovery, and cardio at a glance TRAIN SMARTER Muscle Load shows your weekly sets and frequency per muscle group against your targets — so you never undertrain a muscle or grind one into the ground. Train with intention, not guesswork. ● Weekly set and frequency targets per muscle ● Spot imbalances before they become plateaus ● Stimulus, recovery, and cardio rings keep your week in check PLANS BUILT FOR YOU Choose from proven programs — Push/Pull/Legs, upper/lower hybrids, strength and conditioning splits, full-body recomp — or build your own from scratch. Then dial in every detail. ● Personalized programs for any goal and schedule ● Fully editable: adjust reps, rest, weight, and sets ● 3 to 6 training days per week ● Switch plans anytime as your goals evolve WHY LIFTERS CHOOSE PILLAR Because progress isn't an accident. It's the result of tracking what matters, recovering with intention, and showing up with a plan. Pillar puts all three in your pocket. Download Pillar and start training smarter today. WHY LIFTERS CHOOSE PILLAR Because progress isn't an accident. It's the result of tracking what matters, recovering with intention, and showing up with a plan. Pillar puts all three in your pocket. Download Pillar and start training smarter today. https://pillarfitness.app/privacy-policy https://pillarfitness.app/tos Support: besart@O7apps.com

Screenshots

Built With Science+4 screens
Pillar4 screens

Verdict

The call

The clearest difference is update cadence: Pillar at every 4 days against Built With Science+'s every 2 weeks. Built With Science+'s advantage is device support (3 vs 1). On price, ads, in-app purchases 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 and Pillar sells 3 in-app purchases, starting at $17.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Built With Science+ ships an update every 2 weeks, Pillar every 4 days. The most recent releases landed on September 23, 2026 and September 18, 2026 respectively.

Scorecard2 real differences · 8 level
Built With Science+ versus Pillar: the parameters behind the verdict, then further details
ParameterBuilt With Science+Pillar
PriceFreeFree
Rating4.8 (3.9K ratings) — better
Positive reviews79.8% of reviews
Number of ratings3.9K — better
Update frequencyEvery 2 weeksEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationSubscription
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS16.2 — better16.4
Further details — not scored
Size233 MB76 MB
Age rating4+4+
DeveloperBuilt With Science Holdings CorpO7 Apps

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

Pillar

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
3 purchases

Pillar

Subscriptions3
  • Pillar Plus 1 Month$17.991 Month
  • Pillar Plus 3 Month$29.993 Months
  • Pillar Plus Annual$89.991 Year

Questions

Is Built With Science+ free?
Built With Science+ is free to download, with in-app purchases available.
Is Pillar free?
Pillar is free to download, with in-app purchases available.
Do Built With Science+ or Pillar have ads?
Neither Built With Science+ nor Pillar shows ads.
Which is updated more often, Built With Science+ or Pillar?
Built With Science+ ships an update every 2 weeks, and Pillar every 4 days. Most recently, Built With Science+ was updated on September 23, 2026 and Pillar on September 18, 2026.

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