iFour Core vs Decode Age
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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/
Decode Age
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Decode Age is a comprehensive longevity and wellness platform built on cutting-edge science, helping you take control of your health, slow aging, and live better, longer. The app is your gateway to personalized, precision-driven wellness – combining advanced diagnostic tools, science-backed supplements, and expert-led health insights in one seamless experience. Whether you're looking to discover your biological age, improve your gut microbiome, or adopt anti-aging protocols tailored to your unique health profile, DecodeAge empowers you with the tools and knowledge to make it happen. Our diagnostics go beyond routine health checkups – we use state-of-the-art testing methods including DNA methylation tests, microbiome analysis, and inflammation markers to help you understand your body's aging process at a cellular level. Once your results are in, the DecodeAge app delivers personalized recommendations and actionable plans for lifestyle, nutrition, supplementation, and wellness interventions to help you optimize longevity. You can explore and purchase a curated selection of longevity-focused supplements directly within the app. This includes clinically studied compounds like NMN (Nicotinamide Mononucleotide), Trans-Resveratrol, Spermidine, AKG, Quercetin, and more – all formulated with purity, safety, and efficacy in mind. Each product is backed by transparent research, lab testing, and the guidance of longevity experts. Plus, the app keeps you updated on the latest science with blogs, expert interviews, longevity tips, and ongoing research to help you stay informed and inspired. DecodeAge also simplifies health tracking. With intuitive dashboards, you can monitor your biomarkers, track protocol adherence, log your supplement intake, and visualize your progress over time. Whether you're just beginning your wellness journey or are a health enthusiast aiming to extend your healthspan, the DecodeAge app serves as your daily health companion. Designed with Indian users in mind, DecodeAge ensures fast nationwide shipping, local support, culturally relevant recommendations, and access to world-class wellness tools – all in one place. With an ever-growing user base and a mission to make longevity accessible, DecodeAge is at the forefront of the preventive health and longevity movement in India and beyond. Join thousands of users who are proactively decoding their health, reversing biological aging, and living longer, healthier lives through science. Download DecodeAge today and take the first step toward unlocking your optimal health potential.
Screenshots
Verdict
The clearest difference is in-app purchases: Decode Age at none against iFour Core's 2. Decode Age also leads on update cadence (weekly vs every 2 months). iFour Core's advantage is iOS requirement (11.0 vs 15.6). On price, 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
Both are free to download. iFour Core sells 2 in-app purchases, starting at $5.99 per month. Decode Age asks for nothing beyond the download.
iFour Core ships an update every 2 months, Decode Age weekly. The most recent releases landed on October 4, 2026 and October 11, 2026 respectively.
| Parameter | iFour Core | Decode Age |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (28 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 28 — better | — |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 11.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 39 MB | 107 MB |
| Age rating | 4+ | 17+ |
| Developer | ifour.life, LLC | CENTENARIANS LIFE SCIENCES PRIVATE LIMITED |
In-app purchases
iFour Core
- Monthly7 Days trial$5.991 Month
- Annually7 Days trial$29.991 Year
Decode Age
No in-app purchases









