Comparison

Abs Smash vs iFour Core

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

Head to head
About

Abs Smash

Achieve your dream 6-pack abs and a flatter tummy with this guided core workout program. Follow daily exercises designed to increase intensity over 30 days, suitable for all fitness levels. Track your progress visually with before and after photos.

Highlights
  • 30-day ab fitness challenge
  • Daily core workouts
  • Progress tracking
  • Before and after image storage
  • Beginner, intermediate, and advanced levels
  • 6 workouts with 15 exercise variations
Features
Read full description

Summer is almost here. Get beach body ready with the ultimate ab workout for the 6-pack abs and core you’ve always wanted. Our free ab & core fitness workout is your personal trainer to reaching those 6-pack dreams and getting a flatter tummy. Whether at home or the gyms, AbSmash will lead you through a very detailed core workout. No need to think how to do it... Just follow along and do the daily workouts. AbSmash 30 Day Ab Challenge is a simple 30 day exercise program, where you do a set number of core exercises each day with rest days thrown in! The ab workout increases intensity slowly and day 30 will be the ultimate test at any level for anyone. In total the app has 6 workouts with 15 ab exercise variations. With beginner, intermediate and advanced levels, the workouts and exercises are suitable for both men and women of any age and fitness levels. You can also track your progress and store before and after images to visually see your progress. Please seek medical advice prior to commencement. Subscription pricing and terms: AbsSmash offers an auto-renewing monthly subscription at $5.99/month and an auto-renewing yearly subscription at $19.99/year to provide you with unlimited access to the AbsSmash pro features while you maintain an active subscription. Payment will be charged to the credit card connected to your iTunes Account when you confirm the initial subscription purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period. Your account will be charged for renewal within 24-hours prior to the end of the current period, and the cost of the renewal will be identified. You may manage your subscription and auto-renewal may be turned off by going to your Account Settings after the purchase. Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable. Read more about our terms and conditions here: Terms of service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

iFour Core

This app offers a personalized core workout program designed by physical therapists. It adapts to your individual anatomy and fitness level, providing daily workouts under 10 minutes with video demonstrations. Access nutrition guides and trainer support as a member.

Highlights
  • Personalized core workout program
  • Physical therapy approved exercises
  • Daily workouts under 10 minutes
  • Video demonstrations of exercises
  • Nutrition guides and support
  • Fitness test for customized plans
Features
Read full description

Every individual’s anatomy is different which is why we have designed a customizable, physical therapy approved core program. The iFour Core app addresses specific areas of your core to help you develop the strongest core imaginable without injury. Each workout is under 10 minutes, is suitable for all fitness levels, and can take place in the home or at the gym. As a member of the iFour Core app, you will receive new workouts every day, nutrition guides, and support. FREE 7-day trial for new members! HOW IT WORKS: After completing the iFour Core fitness test, you will get a core strength rating. This rating is broken up based on muscle fibers worked (intrinsic, rectus, obliques & transverse). The iFour Core app customizes the exercises each day based on your fitness test performance and current level of core strength. WHAT MAKES US DIFFERENT: Life is full of surprises, plateaus, and challenges. We created this app with this in mind allowing you to recalibrate your individualized workout formula at any point you feel necessary. Unlike other programs, this is not simply just hitting “reset,” and repeating the same exercises from previous days. This is a full recalculated algorithm taking you from your new “starting point” with a proven plan of attack to help you once again improve. iFour Core Features: Workout & Fitness Planning • Functional yet challenging core rotations, ranging from 5-10 Minutes! • Includes regressions to decrease difficulty and progressions to advance the exercises as you improve. • 323 unique core exercises. • 137 additional core exercises with 6 different pieces of equipment to choose from. • Video demonstrations of all 323 core exercises. • Designed for all levels, whether you are coming out of physical therapy or an elite athlete! • Take the fitness test and as you get stronger, unlock more core exercises prescribed for you. Tracking & Fitness Motivation • Workout along with J, a seasoned trainer for celebrities, professional athletes, and others. • Track your daily progress in both your Fitness Test and Workout History. • Share your results on your favorite social media platform. • Keep up to date and learn with the latest iFour videos. Subscription Pricing & Terms iFourCore is free to download. Ongoing use requires an active subscription, available on a monthly or annual basis. New customers are eligible for a 7-day free trial. Annual subscriptions are billed the total fee from the purchase date. Monthly subscriptions are billed per month. Payment will be charged to your credit card through your iTunes account at confirmation of purchase. Subscription renews automatically unless cancelled at least 24 hours prior to the end of the subscription period. There is no increase in price when renewing. Subscriptions can be managed and auto-renewal turned off in Account Settings in iTunes after purchase. Once purchased, refunds will not be provided for any unused portion of the term. Read our full Terms and Conditions & Privacy Policy: https://www.ifourlife.com/

Screenshots

Abs Smash4 screens
iFour Core4 screens

Verdict

The call

The clearest difference is in-app purchases: Abs Smash at none against iFour Core's 2. Abs Smash also leads on ratings volume (398 vs 28). iFour Core's advantage is review sentiment (100% vs 70%) and rating (5.0 vs 4.7). On price, ads, monetization model and device support 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. iFour Core sells 2 in-app purchases, starting at $5.99 per month. Abs Smash asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

iFour Core holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Abs Smash has 398 ratings behind it against 28, so its average is the more settled of the two. Written reviews point the same way: 70% of Abs Smash's written reviews are positive against 100% of iFour Core's.

UpkeepUpdate frequency

Abs Smash ships an update every 4 months, iFour Core every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 4 level
Abs Smash versus iFour Core: the parameters behind the verdict, then further details
ParameterAbs SmashiFour Core
PriceFreeFree
Rating4.7 (398 ratings)5.0 (28 ratings) — better
Positive reviews70.0% of reviews100.0% of reviews — better
Number of ratings398 — better28
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.011.0 — better
Further details — not scored
Size94 MB39 MB
Age rating12+4+
Developerranknoodle LLcifour.life, LLC

Customer experience

Abs Smash

All ratings393 ratings
Positive92.4%
Neutral4.3%
Negative3.3%
Written reviews20 reviews
Positive70.0%
Neutral5.0%
Negative25.0%

iFour Core

All ratings28 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews11 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Abs Smash

Reported bugs

6 issues
  • ERROR 23: Configuration issue
  • Cannot click Pro for intermediate/advanced workouts
  • Progress tracking error
  • Rest days do not complete
  • App doesn't work after update
Show 1 more
  • Login page loop

Requested features

6 requests
  • Allow modification of challenges
  • Fix rest day completion bug
  • Improve UI design
  • Fix configuration errors
  • Enable progress tracking without errors
Show 1 more
  • Allow reaching support through the app

iFour Core

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Abs Smash

No in-app purchases

2 purchases

iFour Core

Subscriptions2
  • Monthly7 Days trial$5.991 Month
  • Annually7 Days trial$29.991 Year

Questions

Is Abs Smash free?
Abs Smash is free to download, with no in-app purchases.
Is iFour Core free?
iFour Core is free to download, with in-app purchases available.
Which has better reviews, Abs Smash or iFour Core?
iFour Core is rated higher. Abs Smash averages 4.7 out of 5 from 398 ratings, while iFour Core averages 5.0 from 28 ratings.
Do Abs Smash or iFour Core have ads?
Neither Abs Smash nor iFour Core shows ads.
Which is updated more often, Abs Smash or iFour Core?
Abs Smash ships an update every 4 months, and iFour Core every 2 months. Most recently, Abs Smash was updated on November 2, 2026 and iFour Core on November 3, 2026.

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