Body Size - Track & Measure

Name: Body Size - Track & Measure
Rating: 4.5 (62 reviews)
Author: Martspec LLC

Muscle, Fat & Physique Metrics

Free · In‑App Purchases · Designed for iPad

62 Ratings
Ages

9+
Years
Category

Health & Fitness
Developer

Martspec LLC
Language

EN
+ 23 More
Size

43.3
MB

Your body changes. Your goals evolve. This app helps you understand your body with clear, science-based stats based on your measurements — right on your iPhone or Apple Watch. Simple & accurate. ■ FEATURES: • TRACK — 18+ body measurements • SYNCS — Seamlessly across devices • WORKS — iPhone, iPad, Watch & Mac • STATS — 16 personalized insights • TODAY — Daily water & energy needs • CYCLE — Your biorhythm calculation • CHART — Visualize your progress • UNITS - Metric and Imperial • NO AD - Even in free version • DESING - Simple, minimalistic style • iCLOUD - Secure cloud backups • WIDGITS - Quick access on every device • FORMULA - Multiple options for accuracy • STAMINA - Daily workout suggestions • SOMATOTYPE - Calculate your body build • APPLE HEALTH - Fully integrated ■ SAFE AND SECURE Privacy is not something you are merely entitled to, it is an absolute prerequisite. At Martspec, we believe privacy is a fundamental human right. So we built it into our products from the beginning of the design process. We do not share your data with any 3rd party. We do not use it for advertisement purposes and do not use it for profit. Your data is stored only on your Apple service (Apple Health store and iCloud). We do NOT store your data on our servers. ■ DISCLAIMER The information in this app is based on public‑health guidance for anthropometry and body‑composition assessment, such as the World Health Organization (WHO) and the U.S. National Institutes of Health (NIH). This content is designed strictly for educational purposes and should not replace professional medical advice, diagnosis, or treatment. Your use of this application is entirely at your own discretion and risk. The app is made available to you “as is” and “as available,” without any representations or warranties of any kind. While we strive for excellence in our software development, Martspec cannot guarantee that the app will be free from errors or defects. Martspec expressly disclaims all warranties, whether express or implied, including, but not limited to, implied warranties of merchantability, fitness for a particular purpose, and non-infringement. We do not warrant that the app, or any content provided through it, will always be available, uninterrupted, timely, secure, current, accurate, complete, or error-free. You acknowledge that your exclusive remedy for any dissatisfaction or issues with the app is to discontinue its use. Martspec shall not be liable for any direct, indirect, incidental, special, consequential, or exemplary damages, including but not limited to, damages for loss of profits, goodwill, use, data, or other intangible losses resulting from the use or inability to use the app. ■ MISSION At Martspec, we focus on ensuring you can log your data as quickly and easily as possible. Because the easier we make it for you, the more likely you are to stay on track, and the more likely you are to succeed in your health and wellness goals. Making the world a healthier place just got a lot easier. ■ BUILD TOGETHER We’re a passionate team of enthusiasts building this app with one goal in mind—making daily life easier. This app is built on the shared passion of our team and the invaluable feedback of our users. We’re always looking for ways to improve. Whether it’s a new feature, better wording, or a small tweak that would make a big difference, we want to hear from you! Share your thoughts through the feedback section in the app, and together, we can make this the best app possible. Thank you for being a part of our journey! ■ TERMS OF USE: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Ratings & Reviews

4.5

out of 5

62 Ratings

So Far So Good
08/13/2022

ShayJ1144
I'd love the option to track other measurements (neck, arms, legs), but for this app to provide the data-rich reports it already includes FOR FREE, I have to call it a strong option. Well done to the creators, and thanks so much for being mindful of those who are trying to live healthy while also on a budget.

Developer Response
Thank you for your good words and 4 stars rating. Yes, 3 people are volunteering their time, away from their jobs and other activities to keep inventing new and awesome apps.We are considering adding more measurements. Technically it is possible, just time to implement. The greatest challenge is how to keep the interface simple with more functionality. Also, with additional measurements, we could provide more health monitors. For example, Army Body Fat Calculator needs neck size.Also, we believe many would found helpful if we could mathematically calculate body type(Somatotype): ectomorph, mesomorph or endomorph.However, the very next thing, right after the Emotion app update, we plan to work on the Body Size app addressing issues several people reported where their sex, height, and weight did not get pulled from Apple Health. Likely it is a permission issue.
So Far So Good
08/13/2022

ShayJ1144

I'd love the option to track other measurements (neck, arms, legs), but for this app to provide the data-rich reports it already includes FOR FREE, I have to call it a strong option. Well done to the creators, and thanks so much for being mindful of those who are trying to live healthy while also on a budget.
Developer Response 08/15/2022
Thank you for your good words and 4 stars rating. Yes, 3 people are volunteering their time, away from their jobs and other activities to keep inventing new and awesome apps.We are considering adding more measurements. Technically it is possible, just time to implement. The greatest challenge is how to keep the interface simple with more functionality. Also, with additional measurements, we could provide more health monitors. For example, Army Body Fat Calculator needs neck size.Also, we believe many would found helpful if we could mathematically calculate body type(Somatotype): ectomorph, mesomorph or endomorph.However, the very next thing, right after the Emotion app update, we plan to work on the Body Size app addressing issues several people reported where their sex, height, and weight did not get pulled from Apple Health. Likely it is a permission issue.
Best app yet
07/17/2023

LiLac -
For the past couple of years i have struggled with eating disorders, anorexia, bulimia, and binge eating disorder, ect ect. These deeply impacted my physical and mental health, in the last year I have been attending therapy for past trauma, and in this therapy I learned that you can love your body without “liking” it. Once I learned to love my body I started getting into fitness. Since I loved my body, I knew I was overweight and needed to change it. Over the past couple months I have tried hundereds of diets and apps, but none of them really showed me my specific ratios and patterns my body went through. I quiet literally tried hundereds of apps, some free, but most with a trial that limited my knowledge and held me back from greater results. At one point I managed to get 15 pounds down, this was a huge accomplishment considering i had never seen the scale move. While the scale moved down my mental heath did too. On a random day filled with insecurity after I gained all the weigh back, I downloaded some more apps, once I tried this one, I was amazed. I was shown my biorhythm, my body type and body water, how my measurements affected my health, and the details on how some measurements are less or more affective in certain areas. I have now been using this app for a few months, the scale has not moved down, but I have lost SIX inches off my waist, and have less than two to go. I am so thankful for this app, it has helped me lose lots of fat without dieting or a gym, just because I understood my body. Would 10/10 recommend this to another person, and have had no issues with the app.

Developer Response
Thank you for providing us with your insightful feedback. I have shared it with our team, and we are thrilled to learn that our app has been beneficial for its users. I have good news, we plan to release a new version very soon and it would have even better tools. As an improvement, we've included charts for measurements, monthly views, and monitors to provide a more comprehensive view of progress in each category over time. Additionally, we've added segmented bars to all monitors to enhance the visualization of your current state.
Best app yet
07/17/2023

LiLac -

For the past couple of years i have struggled with eating disorders, anorexia, bulimia, and binge eating disorder, ect ect. These deeply impacted my physical and mental health, in the last year I have been attending therapy for past trauma, and in this therapy I learned that you can love your body without “liking” it. Once I learned to love my body I started getting into fitness. Since I loved my body, I knew I was overweight and needed to change it. Over the past couple months I have tried hundereds of diets and apps, but none of them really showed me my specific ratios and patterns my body went through. I quiet literally tried hundereds of apps, some free, but most with a trial that limited my knowledge and held me back from greater results. At one point I managed to get 15 pounds down, this was a huge accomplishment considering i had never seen the scale move. While the scale moved down my mental heath did too. On a random day filled with insecurity after I gained all the weigh back, I downloaded some more apps, once I tried this one, I was amazed. I was shown my biorhythm, my body type and body water, how my measurements affected my health, and the details on how some measurements are less or more affective in certain areas. I have now been using this app for a few months, the scale has not moved down, but I have lost SIX inches off my waist, and have less than two to go. I am so thankful for this app, it has helped me lose lots of fat without dieting or a gym, just because I understood my body. Would 10/10 recommend this to another person, and have had no issues with the app.
Developer Response 07/20/2023
Thank you for providing us with your insightful feedback. I have shared it with our team, and we are thrilled to learn that our app has been beneficial for its users. I have good news, we plan to release a new version very soon and it would have even better tools. As an improvement, we've included charts for measurements, monthly views, and monitors to provide a more comprehensive view of progress in each category over time. Additionally, we've added segmented bars to all monitors to enhance the visualization of your current state.
THANKS, BUT: The sequel is about fat water and muscle
12/26/2025

HELP ME PLS THE SECOND!!
Thanks for the last reply, I heard you. But this doesn't help you achieve the goals of your app. I have all my parameters measured in the body -> biometrics section. Plus my height in the somatometry subsection. And you know what? If fat has already become instead of 17.5 -> 9.6 (real 11.5), then everything else remains as well... muscles 26.4 instead of 32.8; dry weight 53 versus 57.6, water 38.8 versus 42.4. And in total, my biological age is 28 and longevity is -0.7. Maybe it's better to add a slider for these indicators for self-selection? Make a subsection with the message "Do you have accurate data on muscle/fat/water/dry mass? Enter it." Because it's really not showing correctly...

Developer Response
Thank you for the detailed feedback. We understand your concern, but we want to clarify how the app works to get you the accurate data you need.Unlike gym scales that use electrical sensors (bioimpedance), our app relies on anthropometric science. The app is designed to calculate these stats automatically based on the relationships between your body dimensions.To fix the "incorrect" metrics, please try these two steps:1️⃣ Enter all measurements: If you leave fields (like neck, waist, or hips) empty, the app uses statistical averages to fill in the gaps, which causes the "random" results you are seeing. Please fill in all measurement fields, and the equations will update to reflect your specific physique.2️⃣ Check the Formula Sources: Since bodies vary, we offer multiple calculation methods developed by physicians over the last 50 years. Tap the upper right corner of any stat (like Body Fat %) to switch formulas. We now provide a detailed description and the academic source/citation for every formula, so you can read exactly how the math works and choose the one that aligns best with your gym's data.Regarding synchronization with specific gym apps like DDX: We have actually received similar requests from several users over the past year. While we don't have a direct integration ready just yet, we are planning to introduce a broad Data Import & Export feature in our next major version. This should allow you to transfer data from various external sources into our app.We are a small indie team building this without big investors, so we truly appreciate your feedback. If our explanation helps you get better utility from the app, please consider updating your rating—it really helps us survive and keep improving!__UPDATE TO YOUR LAST COMMENT:You’re absolutely right: when fat, muscle, water, and dry mass are estimated incorrectly, all derived metrics (including biological age and longevity) become inaccurate. These values are currently calculated using anthropometric formulas, which can differ from real measured data. Your suggestion to allow manual input of verified biometrics is very valid, and we’ve shared it with our product team.If you’re open to it, please feel free to write to our support email — it’s much easier for us to have a proper conversation there and discuss improvements in more detail.
THANKS, BUT: The sequel is about fat water and muscle
12/26/2025

HELP ME PLS THE SECOND!!

Thanks for the last reply, I heard you. But this doesn't help you achieve the goals of your app. I have all my parameters measured in the body -> biometrics section. Plus my height in the somatometry subsection. And you know what? If fat has already become instead of 17.5 -> 9.6 (real 11.5), then everything else remains as well... muscles 26.4 instead of 32.8; dry weight 53 versus 57.6, water 38.8 versus 42.4. And in total, my biological age is 28 and longevity is -0.7. Maybe it's better to add a slider for these indicators for self-selection? Make a subsection with the message "Do you have accurate data on muscle/fat/water/dry mass? Enter it." Because it's really not showing correctly...
Developer Response 12/29/2025
Thank you for the detailed feedback. We understand your concern, but we want to clarify how the app works to get you the accurate data you need.Unlike gym scales that use electrical sensors (bioimpedance), our app relies on anthropometric science. The app is designed to calculate these stats automatically based on the relationships between your body dimensions.To fix the "incorrect" metrics, please try these two steps:1️⃣ Enter all measurements: If you leave fields (like neck, waist, or hips) empty, the app uses statistical averages to fill in the gaps, which causes the "random" results you are seeing. Please fill in all measurement fields, and the equations will update to reflect your specific physique.2️⃣ Check the Formula Sources: Since bodies vary, we offer multiple calculation methods developed by physicians over the last 50 years. Tap the upper right corner of any stat (like Body Fat %) to switch formulas. We now provide a detailed description and the academic source/citation for every formula, so you can read exactly how the math works and choose the one that aligns best with your gym's data.Regarding synchronization with specific gym apps like DDX: We have actually received similar requests from several users over the past year. While we don't have a direct integration ready just yet, we are planning to introduce a broad Data Import & Export feature in our next major version. This should allow you to transfer data from various external sources into our app.We are a small indie team building this without big investors, so we truly appreciate your feedback. If our explanation helps you get better utility from the app, please consider updating your rating—it really helps us survive and keep improving!__UPDATE TO YOUR LAST COMMENT:You’re absolutely right: when fat, muscle, water, and dry mass are estimated incorrectly, all derived metrics (including biological age and longevity) become inaccurate. These values are currently calculated using anthropometric formulas, which can differ from real measured data. Your suggestion to allow manual input of verified biometrics is very valid, and we’ve shared it with our product team.If you’re open to it, please feel free to write to our support email — it’s much easier for us to have a proper conversation there and discuss improvements in more detail.
No way to type in measurements?
07/28/2025

Mallory Name Taken 123445
Is it just me or can I not type in the measurements. Using the plus and minus is awkward. Still a fantastic app!

Developer Response
Thanks for the great feedback—and perfect timing with your question! We just wrapped up an internal presentation on the new interface for our next app release, and the input system was one of the most debated topics. Most of the team prefers typing in numbers, while others like the simplicity of plus/minus buttons. Our designers are now exploring ways to combine the best of both worlds.If you have suggestions on how to make it work smoothly—or if there’s a feature you’d love to see in the next version—now is the perfect time to let us know! Just drop us an email.And if this answered your question, we’d really appreciate it if you’d consider bumping your rating to 5 stars—it makes a big difference for the team’s motivation. 😊
No way to type in measurements?
07/28/2025

Mallory Name Taken 123445

Is it just me or can I not type in the measurements. Using the plus and minus is awkward. Still a fantastic app!
Developer Response 07/29/2025
Thanks for the great feedback—and perfect timing with your question! We just wrapped up an internal presentation on the new interface for our next app release, and the input system was one of the most debated topics. Most of the team prefers typing in numbers, while others like the simplicity of plus/minus buttons. Our designers are now exploring ways to combine the best of both worlds.If you have suggestions on how to make it work smoothly—or if there’s a feature you’d love to see in the next version—now is the perfect time to let us know! Just drop us an email.And if this answered your question, we’d really appreciate it if you’d consider bumping your rating to 5 stars—it makes a big difference for the team’s motivation. 😊

- Our biggest app redesign ever - NEW: Bio age estimation - NEW: Longevity prediction - NEW: Lean Body Mass - NEW: Muscle Mass - NEW: Fitness age estimates - NEW: Energy requirements - NEW: Protein, Fats and Carbs recommendations - NEW: Change stats calculation formulas - NEW: Abdominal size and biceps skinfold metrics - NEW: Built from scratch widgets for iPhone and Apple Watch - NEW: Workout recommendation based on VO2Max - NEW: Active energy needs are based on VO2Max or Steps - Updated splash screen animation - Removed icons as nobody could see them anyways - Fix Pear shape to also consider shoulders size - Fix Body Fat % for Male calculation (use now abdomen size instead of waist size)