Comparison

iFour Core vs RowOn

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

Head to head
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/

About

RowOn

This app turns indoor rowing into a rhythmic, engaging game. Instead of just tracking metrics, you row to the beat of music, aiming to build streaks and earn points in dynamic environments. It offers personalized workouts to keep your training fun and energized.

Highlights
  • Row to the rhythm of music
  • Real-time gameplay with scoring
  • Dynamic visual environments
  • Customizable workout intensity
  • Streak building and engagement
  • Compatible with Concept2 PM5
Features
Read full description

RowOn transforms indoor rowing into an immersive, music-driven experience. Instead of watching numbers tick upward, you row to the rhythm. Match the beat. Build streaks. Stay engaged. Row to the Music Your stroke meets the tempo. Feel the rhythm guide your pace. Real-Time Gameplay Time your catch. Earn points. Keep the streak alive. Dynamic Environments Visual worlds that respond to your effort and intensity. Built Around You Tailor workouts to your pace and challenge level. RowOn keeps training focused, energized, and fun Currently works with Concept2 PM5. All features are currently free.

Screenshots

iFour Core4 screens
RowOn4 screens

Verdict

The call

The clearest difference is in-app purchases: RowOn at none against iFour Core's 2. RowOn also leads on update cadence (every 3 weeks vs every 2 months). iFour Core's advantage is ratings volume (28 vs 2) and iOS requirement (11.0 vs 17.6). On price, rating, ads 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. RowOn asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for iFour Core against 5.0 for RowOn. That said, the two scores are not equally well evidenced: iFour Core has 28 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

iFour Core ships an update every 2 months, RowOn every 3 weeks. The most recent releases landed on October 4, 2026 and October 16, 2026 respectively.

Scorecard5 real differences · 5 level
iFour Core versus RowOn: the parameters behind the verdict, then further details
ParameteriFour CoreRowOn
PriceFreeFree
Rating5.0 (28 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews—
Number of ratings28 — better2
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS11.0 — better17.6
Further details — not scored
Size39 MB59 MB
Age rating4+12+
Developerifour.life, LLCTetta Studios LLC

Customer experience

iFour Core

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

RowOn

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

iFour Core

Subscriptions2
  • Monthly7 Days trial$5.991 Month
  • Annually7 Days trial$29.991 Year
None

RowOn

No in-app purchases

Questions

Is iFour Core free?
iFour Core is free to download, with in-app purchases available.
Is RowOn free?
RowOn is free to download, with no in-app purchases.
Which has better reviews, iFour Core or RowOn?
iFour Core and RowOn are both rated 5.0 out of 5 on the App Store, from 28 and 2 ratings respectively.
Do iFour Core or RowOn have ads?
Neither iFour Core nor RowOn shows ads.
Which is updated more often, iFour Core or RowOn?
iFour Core ships an update every 2 months, and RowOn every 3 weeks. Most recently, iFour Core was updated on October 4, 2026 and RowOn on October 16, 2026.

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