Comparison

BMI Calculator by DevTechie vs Weight Diary

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

Head to head
About

BMI Calculator by DevTechie

Features
Read full description

BMI Calculator – Track Your Health with Ease Understanding your health starts with knowing your Body Mass Index (BMI). Our BMI Calculator makes it simple to calculate and interpret your BMI using your height and weight. Whether you are looking to manage your weight, stay within a healthy range, or simply monitor your progress over time, this app provides a quick and reliable solution. Key Features: Accurate BMI Calculation: Enter your height and weight in either imperial or metric units to instantly receive your BMI score. Clear Results with Categories: Get straightforward results along with categories such as Underweight, Normal, Overweight, or Obese, so you always understand what your BMI means. Interactive Onboarding: Guided steps help you enter your information quickly and accurately, including optional gender for better accuracy. Visual Feedback: Easy-to-read results with color-coded indicators give you instant insight into where you stand. Recalculation Made Simple: Update your information at any time to track changes and monitor your progress. Privacy First: No personal data collection. Your information stays on your device. Why Use This App? BMI is one of the simplest and most widely used ways to assess whether your weight is in a healthy range. By combining your height and weight, BMI gives you a quick snapshot of your body’s health status. While BMI is not a perfect measure—it does not distinguish between fat and muscle—it provides a useful starting point for understanding your overall wellness. Who Is This App For? Anyone who wants to quickly check their BMI. People tracking weight management goals. Fitness enthusiasts looking for simple health insights. Those curious about where they fall within standard BMI ranges. Disclaimer The BMI Calculator is intended for general informational purposes only. It should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider for questions related to your health. Take the first step in understanding your health. Download the BMI Calculator today and start making informed choices for a healthier tomorrow. Unlock all features with a subscription! Enjoy a free trial with the weekly, monthly and yearly subscription—don’t miss out! End use license agreement (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Weight Diary

Easily track your weight with a simple interface and visual progress charts. Gentle animal companions offer encouragement as you work towards your health goals. Optional premium features enhance the experience with more customization and data management.

Highlights
  • Log weight in seconds
  • Clear progress charts
  • Automatic BMI calculation
  • Gentle animal companions
  • Multiple profiles (Premium)
  • Manual backup (Premium)
Features
Read full description

Tracking your weight should be simple. And maybe even a little bit lovely. Weight Diary does exactly what you need and nothing you don't. Open it, tap in your weight, and you're done — in seconds. A soft little animal friend is there each time to meet you, and week by week you watch your progress quietly take shape on one clean, easy screen. Everything in one calm, uncluttered place — and quietly on your side, whatever you're working toward: losing, gaining, holding steady, or simply getting to know your body. WHAT'S INSIDE - Log your weight in a few taps - Clear, simple charts of your progress - Every entry, kept in full - Automatic BMI - Gentle animal companions who are happy to see you PREMIUM (optional) - More animal friends to choose from - Multiple profiles — for a partner or the whole family - Manual backup, so nothing is ever lost - No ads Buy once, or try Premium for a while with a subscription — whatever feels right. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

BMI Calculator by DevTechie4 screens
Weight Diary4 screens

Verdict

The call

The clearest difference is ads: BMI Calculator by DevTechie at none against Weight Diary's shown. Weight Diary's advantage is iOS requirement (16.4 vs 26.0). On price, update cadence, in-app purchases 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. BMI Calculator by DevTechie sells 3 in-app purchases, starting at $4.99 per 7 days and Weight Diary sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

BMI Calculator by DevTechie ships an update every 4 weeks, Weight Diary every 2 weeks. The most recent releases landed on September 17, 2026 and September 10, 2026 respectively.

Scorecard2 real differences · 7 level
BMI Calculator by DevTechie versus Weight Diary: the parameters behind the verdict, then further details
ParameterBMI Calculator by DevTechieWeight Diary
PriceFreeFree
Rating—5.0 (3 ratings) — better
Number of ratings—3 — better
Update frequencyEvery 4 weeksEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.016.4 — better
Further details — not scored
Size1 MB65 MB
Age rating4+12+
DeveloperAnoop tomarSergei Korneev

In-app purchases

3 purchases

BMI Calculator by DevTechie

Subscriptions3
  • BMI Weekly Access$4.997 Days
  • BMI Monthly Access$8.991 Month
  • BMI Yearly Access$24.991 Year
3 purchases

Weight Diary

Subscriptions2
  • Premium (monthly)$1.991 Month
  • Premium (yearly)$9.991 Year
One-time1
  • Premium (lifetime)$14.99

Questions

Is BMI Calculator by DevTechie free?
BMI Calculator by DevTechie is free to download, with in-app purchases available.
Is Weight Diary free?
Weight Diary is free to download, with in-app purchases available.
Do BMI Calculator by DevTechie or Weight Diary have ads?
Weight Diary shows ads; BMI Calculator by DevTechie does not.
Which is updated more often, BMI Calculator by DevTechie or Weight Diary?
BMI Calculator by DevTechie ships an update every 4 weeks, and Weight Diary every 2 weeks. Most recently, BMI Calculator by DevTechie was updated on September 17, 2026 and Weight Diary on September 10, 2026.

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