Abs Smash vs iFour Core
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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/
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.
- 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
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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
Verdict
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
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.
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.
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.
| Parameter | Abs Smash | iFour Core |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (398 ratings) | 5.0 (28 ratings) — better |
| Positive reviews | 70.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 398 — better | 28 |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 94 MB | 39 MB |
| Age rating | 12+ | 4+ |
| Developer | ranknoodle LLc | ifour.life, LLC |
Customer experience
Abs Smash
iFour Core
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
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- 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
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- Allow reaching support through the app
iFour Core
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Abs Smash
No in-app purchases
iFour Core
- Monthly7 Days trial$5.991 Month
- Annually7 Days trial$29.991 Year









