Amusing BMI Calculator vs NO, DON'T DO IT
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Amusing BMI Calculator
Calculate your Body Mass Index (BMI) with this user-friendly app featuring a virtual dog companion. It supports various measurement systems and provides weight classifications with entertaining reactions.
- Computes Body Mass Index (BMI)
- User-friendly and entertaining interface
- Accepts imperial, metric, and mixed system inputs
- Shows BMI and weight category
- Features a virtual dog companion for motivation
- Supports users 20 years and older
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Lose weight and keep a healthy weight and Body Mass Index (BMI) with help from a cute dog named Alexander. This amusing app is available free in English, Spanish, French, Italian, Czech and Russian. - Computes Body Mass Index (BMI) by using the method used by most doctors. - A user-friendly and entertaining app. Simply enter weight and height. - Accepts imperial, metric and mixed system inputs. - App shows BMI, weight category and a cute dog Alexander's reaction. - For people 20 years and older of any gender. Alexander can become your virtual pet and trusted companion to help you achieve the desired weight loss (or weight gain) and make weight management easier. This app is a delight for dog lovers. Keep a healthy weight and make Alexander happy! How to use the app: 1. Tap on desired unit for weight (pounds or kilos) and enter your weight in small box. 2. Tap on desired unit for height (inches or centimeters) and enter your height in small box. If you know your height in feet and inches, select inches and use 1 ft equals 12 inches. For example, if your height is 5 ft and 7 inches, you would enter (5 x 12) inches + 7 inches, which is 67 inches. 3. Hit the return key and tap the "show BMI" button. The app will show BMI value, category and Alexander's reaction. About the app: The app accepts weight input in kilos or pounds and height input in inches or centimeters (cms). You can choose the imperial system (weight in pounds, height in inches) or the metric system (weight in kilos, height in cm). You can also use mixed system inputs, for example, weight in kilos and height in inches. Mixed system is still in use in many places, for example, parts of Great Britain, such as, England and Scotland and also in Canada, Ireland, South Africa, India, Pakistan, Bangladesh, Australia, New Zealand and several other Commonwealth countries. The default is pounds for weight and inches for height. Keeping a healthy weight is important for good health. Obesity is becoming a major health problem in many countries, for example, the United States (US), India, China, Russia, Brazil, Egypt, Germany, Saudi Arabia, Turkey, Mexico, Iran, New Zealand, Hungary, Canada, Iraq, Australia, the United Kingdom (UK), Argentina, South Africa, Norway, Greece and many others. Being overweight or obese is considered a risk factor for many diseases, such as, diabetes, stroke, heart disease and high blood pressure. Conversely, being underweight can be a sign of an underlying medical condition or eating disorder, such as, anorexia and bulimia. This app shows your weight category and BMI for easy weight monitoring. It also provides an entertaining way to achieve and maintain a healthy weight and BMI with help from the wonderful dog Alexander. The app contains 8 categories ranging from "Very severely underweight" to "Very severely obese" and Alexander's reaction for each category. Alexander is a great motivator to help you achieve your weight loss goals and maintain a healthy weight and BMI. About BMI: Body Mass Index (BMI) is widely used by healthcare professionals as one of the measures to assess the overall health of a person. This app provides a simple way for people to keep track of their BMI values. It is intended to be used for people 20 years and older. Disclaimer: This app is not meant to replace the advice of your medical professional. Please get medical advice before starting any weight loss or weight gain regimen.
NO, DON'T DO IT
This app provides discreet haptic vibration nudges on your Apple Watch or iPhone to help you stop unwanted behaviors in the moment. It's designed for just-in-time intervention before you enter tempting situations, offering silent reminders that only you can feel.
- Discreet haptic vibration nudges
- Apple Watch and iPhone support
- Just-in-time behavioral interruption
- Pre-situational setup
- Customizable behaviors
- Science-backed psychology
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"Stop drinking, snacking, vaping, and other unwanted behaviors before they start!" You know what you don't want to do - but stopping in the moment is hard. "No, Don't Do It" delivers discreet and private haptic vibration nudges through your Apple Watch or iPhone to stop unwanted behaviors exactly when you're most vulnerable. Unlike habit trackers that log failures after the fact, we provide just-in-time behavioral interruption at your moment of choice. Set up before entering tempting situations - parties, stressful meetings, shopping trips - and receive gentle, undetectable haptic vibration reminders that only you can feel. KEY FEATURES • Apple Watch optimized - discreet wrist-based intervention nobody else notices • iPhone backup - powerful Taptic Engine delivers equally effective pocket-based nudging • Private and discreet - silent haptic vibration only you can feel • Research-backed - based on proven just-in-time intervention psychology • Pre-situational setup - prepare before entering challenging situations • Custom behaviors - create your own or choose from 20+ examples • Extended durations - 15 minutes to 1 hour for real-world situations Perfect for self-control, willpower support, and conscious behavioral change in social situations, work environments, and daily life. Built on decades of behavioral psychology research from leading institutions like Harvard, Stanford, and the University of Washington. Academic studies prove that just-in-time intervention is significantly more effective than traditional habit tracking approaches. The Digiguys Apps team is excited to bring this science-backed behavioral interruption technology to your daily life. WHY USERS CHOOSE "NO, DON'T DO IT" • Works instantly - No learning curve, no complex setup • Completely private - Silent, discreet, undetectable to others • Apple Watch ready - Seamless integration with your existing devices • Science-backed - Based on proven behavioral psychology research • No judgment - Simple interruption without shame or tracking • Real situations - Perfect for parties, meetings, social events PERFECT FOR • Social drinkers who want to moderate at parties • Stress eaters during work meetings • Impulse shoppers at malls or online • Phone checkers during conversations • Anyone wanting discreet self-control support SUPPORT For support, go to https://www.digiguys.com Q: Is the No, Don't Do It app free? A: In the FREE version, you get 5 minutes of haptic vibration. You can upgrade to full access haptic vibration nudges with extended durations. Q: How does the No, Don't Do It app work? A: Simple. Before you enter a triggering situation, select the behavior you want to interrupt and the amount of time to be nudged, and start. The haptic vibration will remind you every so often of what you want to avoid doing, from 15 minutes to 1 hour in your Apple Watch or iPhone. Q: Do I need an Apple Watch? A: No. While Apple Watch provides the ideal discreet wrist-based experience, your iPhone's Taptic Engine delivers equally effective private haptic vibration. Q: How is this different from habit tracking apps? A: We don't track or motivate - we interrupt unwanted behaviors triggered by situations. Instead of logging failures, we provide real-time intervention for self-control and behavioral change at your moment of choice. Q: What situations work best? A: Situational behaviors triggered by specific contexts (parties, meetings, shopping, social events) respond exceptionally well to just-in-time intervention and pre-situational setup. Q: Are these like notifications? A: No. Unlike notifications that require you to take action. No, Don't Do It uses private and gentle haptic vibrations. IMPORTANT HEALTH NOTICE This is a behavioral support tool, not medical treatment. If your behavior involves health, mental health, or safety concerns, please consult a healthcare professional before use. Terms & Conditions: https://www.digiguys.com/no-dont-do-it-terms-and-condi
Screenshots
Verdict
The clearest difference is in-app purchases: Amusing BMI Calculator at none against NO, DON'T DO IT's 3. Amusing BMI Calculator also leads on iOS requirement (11.0 vs 17.6). NO, DON'T DO IT's advantage is update cadence (weekly vs every 3 weeks) and ratings volume (10 vs 1). On price, rating, review sentiment and ads 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. NO, DON'T DO IT sells 3 in-app purchases, starting at $2.99 per month. Amusing BMI Calculator asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Amusing BMI Calculator against 5.0 for NO, DON'T DO IT. That said, the two scores are not equally well evidenced: NO, DON'T DO IT has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
Amusing BMI Calculator ships an update every 3 weeks, NO, DON'T DO IT weekly. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.
| Parameter | Amusing BMI Calculator | NO, DON'T DO IT |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (10 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 1 | 10 — better |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 11.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 9 MB | 29 MB |
| Age rating | 4+ | 17+ |
| Developer | Salil Biswas | Digiguys, Inc |
Customer experience
Amusing BMI Calculator
NO, DON'T DO IT
In-app purchases
Amusing BMI Calculator
No in-app purchases
NO, DON'T DO IT
- Monthly Full Access$2.991 Month
- Yearly Full Access$19.991 Year
- Full Lifetime Access$29.99
Questions
Is Amusing BMI Calculator free?
Is NO, DON'T DO IT free?
Which has better reviews, Amusing BMI Calculator or NO, DON'T DO IT?
Do Amusing BMI Calculator or NO, DON'T DO IT have ads?
Which is updated more often, Amusing BMI Calculator or NO, DON'T DO IT?
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