# Happy Scale vs BMI Calculator

The clearest difference is monetization model: BMI Calculator at free with in-app purchases against Happy Scale's subscription. BMI Calculator also leads on iOS requirement (11.0 vs 16.0). Happy Scale's advantage is ads (none vs shown) and update cadence (every 5 days vs every 13 months). On price, rating, in-app purchases and device support there is nothing between them.

Both are free to download. Happy Scale sells 8 in-app purchases, starting at $1.99 per month and BMI Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Happy Scale against 4.8 for BMI Calculator. That said, the two scores are not equally well evidenced: Happy Scale has 58K ratings behind it against 376, so its average is the more settled of the two. Written reviews are what separate them: 92% of Happy Scale's written reviews are positive against 83% of BMI Calculator's.

Happy Scale ships an update every 5 days, BMI Calculator every 13 months. Both last shipped on October 27, 2026.

## The numbers

| Metric | Happy Scale | BMI Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (58K ratings)](https://appshunter.io/ios/app/happy-scale/id532430574/reviews)** | [4.8 (376 ratings)](https://appshunter.io/ios/app/bmi-calculator-weight-tracker/id1572432663/reviews) |
| Number of ratings | **58K** | 376 |
| Positive reviews | **91.6% of reviews** | 83.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 13 months |
| Monetization | Subscription | **Free with in-app purchases** |
| Best chart rank | **#187** | — |
| Size | 66 MB | 37 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Front Pocket Software LLC](https://appshunter.io/developer/425877766) | [Leap Health](https://appshunter.io/developer/1687598595) |

## What reviewers say

### Happy Scale

[App page](https://appshunter.io/ios/app/happy-scale/id532430574)

**Currently charting:** #187 Top Grossing · Health & Fitness (US App Store)

This app helps you understand your weight loss journey by analyzing scale fluctuations. It smooths out daily variations to reveal your true progress, predict future weights, and break down goals into manageable milestones.

**Highlights:** See true progress with mathematical analysis, Smooth out weigh-in fluctuations, Predict future weight, Break down goals into milestones, Integrates with Apple Health, BMI calculator

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Happy Scale Deluxe (Monthly) | $1.99 | per month |
| Happy Scale Deluxe (Yearly) | $11.99 | per year |
| Tip $1 | $0.99 | one-time |
| Tip $3 | $2.99 | one-time |
| Tip $5 | $4.99 | one-time |
| Tip $10 | $9.99 | one-time |
| Happy Scale Premium (Lifetime) | $39.99 | one-time |
| Happy Scale Deluxe (Lifetime) | $39.99 | one-time |

**What reviewers like**

- 👍 Excellent weight loss support tool
- 👍 Motivating and engaging to track weight
- 👍 Provides great insights and predictions
- 👍 Smooths out weight fluctuations
- 👍 Breaks down weight loss journey into milestones

**What reviewers complain about**

- 🐛 Reminders don't work for some users
- 💰 Subscription model is expensive for some

**Reported bugs**

- Reminders don't work for some users

**Requested features**

- Add ability to track body measurements and body fat percentage
- Provide more chart/graph options (60-day, 6-month)
- Add a watch app or complication for easier access
- Implement more celebratory features when reaching goals


### BMI Calculator

[App page](https://appshunter.io/ios/app/bmi-calculator-weight-tracker/id1572432663)

Calculate your Body Mass Index (BMI) using age, gender, height, and weight. Track your health progress, find your ideal weight, and receive tips for weight control. Supports metric and imperial units and syncs with Apple Health.

**Highlights:** Calculate BMI scientifically, Find ideal weight, Log BMI history, Track health progress, Sync data to Apple Health, Metric and imperial support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |

**What reviewers like**

- 👍 Easy to use and understand
- ✅ Accurate BMI calculation
- 📈 Helpful for tracking weight
- 😊 Improves self-esteem
- ✨ Pleasant visual design

**What reviewers complain about**

- 🤔 Discrepancy with doctor's advice
- ⚠️ Can cause insecurity about weight
- 📉 Graph scale not ideal for weight loss
- 🚫 Ads can be intrusive
- 🤷‍♀️ Some users disagree with weight categorization

**Reported bugs**

- App crashes when entering decimal weight
- App crashes when entering second day's weight
- App crashes when pressing the 'day' button
- App crashes on second day's input

**Requested features**

- Add messages and tips for different weight categories (underweight, overweight, obese)
- Implement dark mode
- Allow data storage for multiple users
- Adjust graph scale for better visibility of weight loss
- Allow input of decimal numbers for weight


## Frequently asked questions

### Is Happy Scale free?

Happy Scale is free to download, with in-app purchases available.

### Is BMI Calculator free?

BMI Calculator is free to download, with in-app purchases available.

### Which has better reviews, Happy Scale or BMI Calculator?

Happy Scale is rated higher. Happy Scale averages 4.9 out of 5 from 58K ratings, while BMI Calculator averages 4.8 from 376 ratings.

### Do Happy Scale or BMI Calculator have ads?

BMI Calculator shows ads; Happy Scale does not.

### Which is updated more often, Happy Scale or BMI Calculator?

Happy Scale ships an update every 5 days, and BMI Calculator every 13 months. Most recently, Happy Scale was updated on October 27, 2026 and BMI Calculator on October 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*