Comparison

Flat Stomach & Core vs HeightUp

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

Head to head
About

Flat Stomach & Core

Features
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TRANSFORM YOUR CORE. BUILD LASTING HABITS. ACHIEVE A FLAT STOMACH. Join over 2 million users who have ditched generic routines for a personalized, habit-first approach to core fitness. Flat Stomach & Core is your daily companion for a stronger body and a healthier life Why do most fitness plans fail? Because they ignore the psychology of consistency. Flat Stomach & Core combines elite abdominal training with a robust habit-building framework. From your personalized onboarding to your daily progress tracking, we ensure that your intention turns into a repeatable routine Stop following cookie-cutter plans. Our intelligent system captures your profile, goals, and experience level to generate a tailored training plan that evolves with you. Whether you are a beginner looking for direction or a pro seeking a reliable framework, your journey is uniquely yours. = Daily Guided Workouts: Step-by-step execution for movements like the Weighted Decline Crunch, Hanging Knee Raises, and Cable Crunches. = Habit Architecture: Integrated calendar and day-review screens encourage reflection and continuity, reinforcing adherence over time. = Exercise Intelligence: Deep-dive exercise detail screens explain the "how" and the "why" behind every contraction, ensuring perfect form and safety. = Home & Office Flexibility: No gym? No problem. Our routines are designed for bodyweight execution, making it the perfect home fitness solution. = Posture & Stability Focus: Beyond aesthetics, we strengthen the transverse abdominis and multifidus to support spinal health and reduce back pain. Our workout system is built on the principle of progressive overload. We move you through structured plans that target the entire midsection: = Lower Abs: Bottom-up movements like Leg Raises and Knee Tucks. = Obliques: Rotational powerhouses like Russian Twists and Woodchoppers. = Core Stabilization: Isometric holds like Planks and Bird Dogs for iron-strong stability. Built with cutting-edge Flutter architecture and Riverpod, Flat Stomach & Core offers a smooth, lag-free experience. With media prefetching and cache orchestration, your workout assets load instantly, keeping you focused on the burn, not the loading screen. Your health data is sensitive. We prioritize your privacy with a transparent policy and secure infrastructure. Sync seamlessly with Apple Health to keep your fitness data in one place.5 Are you ready to see your six-pack? Start your 30-day transformation today. Download Flat Stomach & Core and build the body you deserve. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

HeightUp

Features
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Find out how tall you'll actually be, and how much of it is still in your hands. HeightUp reads your growth off the World Health Organization growth charts, then shows you what to do with the time you have left. WHY THIS ISN'T A GUESS Most height apps look at your age and stop. HeightUp predicts two ways at once, then combines them. Your parents. Their heights set the target your body is built toward. Your own curve. We put your height on the World Health Organization growth charts and follow your line forward to where it lands as an adult. Only using parents tells a tall kid with short parents he'll shrink. Only using charts forgets where he came from. We use both, and we never predict you shorter than you already are. WHAT YOU ACTUALLY DO WITH IT Genetics decide about 80%. The rest is sleep, food and training, and that part is still yours. Stop guessing what to eat. Photograph your plate. Calories, protein, calcium and vitamin D3 logged in seconds, against targets built from your age, height and activity. Not a generic number off a website. Stop losing height to your posture. Six drills that undo the forward hunch from sitting all day. Wall angels, cobra, bridge, jumps. Most people are standing shorter than they are right now. Stop wasting your best hours. Growth hormone peaks in deep sleep. Track it, protect it, see what it costs you when you don't. Stop getting generic advice. The coach reads your real logs and your real week, then gives you one thing to do next. Not a list of maybes. Stop panicking over one bad measurement. Check in monthly and watch your actual curve instead of a single number on a bad day. THE PART THAT MATTERS Your growth window closes once, and nothing reopens it. Nobody can add height beyond your potential, and any app that says otherwise is lying. What HeightUp does is help you finish nearer the top of your range than the bottom. That gap is bigger than most people think, and it's built out of what you do between now and the end of your growth. FOR PARENTS Track your child instead of yourself. Same prediction, same plan, written to you rather than to them. HeightUp is an educational app. It is not a medical device and nothing in it is medical advice. SUBSCRIPTION Payment is charged to your Apple ID at purchase. Renews automatically unless cancelled at least 24 hours before the period ends. Manage anytime in your Apple ID settings. Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy: https://heightup.app/privacy/

Screenshots

Flat Stomach & Core4 screens
HeightUp4 screens

Verdict

The call

The clearest difference is ads: Flat Stomach & Core at none against HeightUp's shown. Flat Stomach & Core also leads on iOS requirement (13.0 vs 15.1). On price, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Flat Stomach & Core sells 4 in-app purchases, starting at $4.99 per 7 days and HeightUp sells 2 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Scorecard2 real differences ยท 4 level
Flat Stomach & Core versus HeightUp: the parameters behind the verdict, then further details
ParameterFlat Stomach & CoreHeightUp
PriceFreeFree
Update frequencyโ€”Fortnightly
AdsNo โ€” betterYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPod
Requires iOS13.0 โ€” better15.1
Further details โ€” not scored
Size54 MB47 MB
Age rating4+12+
DeveloperCodeCrossDeivid Velkov

In-app purchases

4 purchases

Flat Stomach & Core

Subscriptions4
  • Unlimited Access to Flat Stomach3 Days trial$4.997 Days
  • Unlimited Access to Flat Stomach$4.997 Days
  • Unlimited Access to Flat Stomach3 Days trial$14.991 Month
Show 1 more
  • Unlimited Access to Flat Stomach$14.991 Month
2 purchases

HeightUp

Subscriptions2
  • HeightUp - Weekly1 Month trial$5.997 Days
  • HeightUp - Yearly$59.991 Year

Questions

Is Flat Stomach & Core free?
Flat Stomach & Core is free to download, with in-app purchases available.
Is HeightUp free?
HeightUp is free to download, with in-app purchases available.
Do Flat Stomach & Core or HeightUp have ads?
HeightUp shows ads; Flat Stomach & Core does not.

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