--- title: "Intensity: Heavy Duty Training - Reviews, Revenue and Downloads in United Kingdom | Apple App Store" description: "Intensity is the only training app built entirely on Mike Mentzer's Heavy Duty method - the most rational, science-based approach to building muscle ever devised. One set. Maximum effort. Complete re" --- # Intensity: Heavy Duty Training — United Kingdom ![Intensity App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/80/09/78/800978ef-d505-b0fc-0e6e-bd12170b12d5/AppIcon-0-0-1x_U007ephone-0-1-85-220.png/434x0w.png) **Developer:** [Adam Khan](https://apptail.io/developer/adam-khan-AXLwmc) **Category:** Health Fitness **Rating:** 4.4/5 (7 ratings) **Price:** Free **Bundle ID:** com.adamkhan.intensity **Store:** Apple App Store **Country:** United Kingdom **Version:** 1.4.0 (released 2026-10-08) **Original Release:** 2026-06-03 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/gb/app/app/id6773111932) **AppTail Page:** [https://apptail.io/app/intensity-heavy-duty-training-xTmA/united-kingdom](https://apptail.io/app/intensity-heavy-duty-training-xTmA/united-kingdom) ## Intensity Description Intensity is the only training app built entirely on Mike Mentzer's Heavy Duty method - the most rational, science-based approach to building muscle ever devised. One set. Maximum effort. Complete recovery. That's it. Most training apps encourage you to do more. Intensity tells you the truth: more is not better. Only harder is better. The body grows during rest - not in the gym. Train less, recover fully, grow more. WHAT'S INSIDE The Ideal Programme - three workouts covering every major muscle group. Chest & Back, Legs & Abs, Shoulders & Arms. One working set per exercise, taken to absolute failure. The Consolidated Programme - two workouts of pure compound movements for advanced trainees whose progress has stalled on Ideal. Recovery tracking - a readiness score calculated from your inroad depth and days rested. The app tells you when your body is genuinely ready to train again, not just when you feel like it. Daily check-in - four recovery signals scored into a readiness verdict. Energy, motivation, soreness, appetite. Honest answers only. Progression tracking - every set logged, every PR detected. Weight and reps charted over time. If you're not stronger every session, something has gone wrong. Exercise library - all 16 Heavy Duty exercises with technique notes, rep ranges, and approved substitutes sourced from Mentzer's published work. Overtraining alerts - train too soon and the app will tell you. Four scenarios based on your inroad depth and days since last workout. Urgency timer - a 5-second countdown between pre-exhaust and compound movements to maintain the physiological link that makes the pre-exhaust technique work. THE METHOD Every feature in this app traces back to a specific principle Mike Mentzer argued for in print. Nothing has been added that contradicts his published methodology. Primary source: High-Intensity Training the Mike Mentzer Way - Mike Mentzer with John Little, McGraw-Hill, 2003. Intensity is an independent app and is not affiliated with, endorsed by, or officially connected to the estate of Mike Mentzer or any related parties. Intensity Pro unlocks full recovery analytics, daily check-in, progression charts, the complete exercise library, body composition tracking, and unlimited session history. Free tier includes the full workout logger and four foundational exercises. Terms of Use: ## Intensity Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/fe/7b/31/fe7b31de-57b7-9355-53f3-835e7d9bd01e/Intensity-App-Store-1.png/1284x2778.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/1f/3d/e3/1f3de387-35e4-a88f-23a5-3a67a3b28d8c/Intensity-App-Store-2.png/1284x2778.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/b4/eb/f6/b4ebf6ed-bba6-8ebf-1e15-80ce40404690/Intensity-App-Store-3.png/1284x2778.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/21/2b/11/212b11cb-d0ec-a83b-50b4-7539d950881a/Intensity-App-Store-4.png/1284x2778.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/0c/ba/34/0cba3403-b72f-672e-4891-462193eb5907/Intensity-App-Store-5.png/1284x2778.png) ## Intensity Rating Breakdown in United Kingdom - 5 stars: 6 (86%) - 4 stars: 0 (0%) - 3 stars: 0 (0%) - 2 stars: 0 (0%) - 1 stars: 1 (14%) ## Intensity Reviews in United Kingdom ### *---- "Roman" I really hope you can include edit exercises , like instead of flies there are also peck deck and other exercises can also should be possible to modify. There is also no option to add extra negatives. The worst thing that after you logged exercise you can not modify it , can not change weight or repitition -- ras1889, 2026-08-05 ### ***** "Great for intensity training." I have struggled to find an app that has given me exactly what I wanted with intensity training, but this one absolutely knocked it out of the park, its features are so easy and it makes intensity training so simple !! -- mariya0612, 2026-06-19 ### ***** "Amazing App" A perfect app to help me hit all of my training goals! 💪 -- Hiya 👍, 2026-06-05 [View all Intensity reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews) ## Intensity In-App Purchases | Item | Price | |------|-------| | Intensity Pro | £9.99 | ## Apps Similar to Intensity - [Dry Needling Guide](https://apptail.io/app/dry-needling-guide-auAb/united-kingdom) - [Motivation - Quotes Daily](https://apptail.io/app/motivation-quotes-daily-SaCo/united-kingdom) - [Strongineering Workout Planner](https://apptail.io/app/strongineering-workout-planner-jfsv/united-kingdom) - [Skyscraper: Grow Taller Coach](https://apptail.io/app/skyscraper-grow-taller-coach-jeMv/united-kingdom) - [MedPal AI](https://apptail.io/app/medpal-ai-OGjw/united-kingdom) - [The Daily Cardio](https://apptail.io/app/the-daily-cardio-Ikpw/united-kingdom) - [Reboot Journey](https://apptail.io/app/reboot-journey-gbNw/united-kingdom) - [NextRep: Workout Plan Daily](https://apptail.io/app/nextrep-workout-plan-daily-iMOw/united-kingdom) - [Strength Direct: Gym Tracker](https://apptail.io/app/strength-direct-gym-tracker-Thex/united-kingdom) - [World Of Lifting](https://apptail.io/app/world-of-lifting-Udxy/united-kingdom) ## Intensity Available In - [United Kingdom](https://apptail.io/app/intensity-heavy-duty-training-xTmA/united-kingdom) - [Belgium](https://apptail.io/app/intensity-heavy-duty-training-xTmA/belgium) - [Belarus](https://apptail.io/app/intensity-heavy-duty-training-xTmA/belarus) - [Canada](https://apptail.io/app/intensity-heavy-duty-training-xTmA/canada) - [Chile](https://apptail.io/app/intensity-heavy-duty-training-xTmA/chile) - [Germany](https://apptail.io/app/intensity-heavy-duty-training-xTmA/germany) - [Denmark](https://apptail.io/app/intensity-heavy-duty-training-xTmA/denmark) - [Greece](https://apptail.io/app/intensity-heavy-duty-training-xTmA/greece) - [Hungary](https://apptail.io/app/intensity-heavy-duty-training-xTmA/hungary) - [Iceland](https://apptail.io/app/intensity-heavy-duty-training-xTmA/iceland) - [Luxembourg](https://apptail.io/app/intensity-heavy-duty-training-xTmA/luxembourg) - [Mexico](https://apptail.io/app/intensity-heavy-duty-training-xTmA/mexico) - [Nigeria](https://apptail.io/app/intensity-heavy-duty-training-xTmA/nigeria) - [Netherlands](https://apptail.io/app/intensity-heavy-duty-training-xTmA/netherlands) - [Norway](https://apptail.io/app/intensity-heavy-duty-training-xTmA/norway) - [New Zealand](https://apptail.io/app/intensity-heavy-duty-training-xTmA/new-zealand) - [Portugal](https://apptail.io/app/intensity-heavy-duty-training-xTmA/portugal) - [Saudi Arabia](https://apptail.io/app/intensity-heavy-duty-training-xTmA/saudi-arabia) - [Sweden](https://apptail.io/app/intensity-heavy-duty-training-xTmA/sweden) - [Taiwan](https://apptail.io/app/intensity-heavy-duty-training-xTmA/taiwan) - [Australia](https://apptail.io/app/intensity-heavy-duty-training-xTmA/australia) - [United States](https://apptail.io/app/intensity-heavy-duty-training-xTmA/united-states) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. 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