# BMI Calculator vs Open Me First

The clearest difference is in-app purchases: BMI Calculator at none against Open Me First's 10. BMI Calculator also leads on iOS requirement (12.0 vs 15.1). Open Me First's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 23 months). On price and device support there is nothing between them.

Both are free to download. Open Me First sells 10 one-off in-app purchases. BMI Calculator asks for nothing beyond the download.

BMI Calculator ships an update every 23 months, Open Me First every 2 weeks. The most recent releases landed on November 1, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | BMI Calculator | Open Me First |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (53 ratings)](https://appshunter.io/ios/app/bmi-calculator-quick-and-easy/id357370467/reviews)** | — |
| Number of ratings | **53** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 23 months | **Every 2 weeks** |
| Monetization | Ad-supported | — |
| Size | 15 MB | 33 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Lukas Lubbe](https://appshunter.io/developer/357370470) | [Steven Askew](https://appshunter.io/developer/1542947224) |

## What reviewers say

### BMI Calculator

[App page](https://appshunter.io/ios/app/bmi-calculator-quick-and-easy/id357370467)

Quickly calculate your Body Mass Index (BMI) using your height and weight. Save your history locally or sync with the Health app for easy tracking. Ideal for fitness and health management with a clear, user-friendly interface.

**Highlights:** Instant BMI calculation, Save calculation history, Health app integration, Supports imperial and metric units, Clear user interface

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

**In-app purchases:** none


### Open Me First

[App page](https://appshunter.io/ios/app/open-me-first/id6754524474)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support the Developer | $0.99 | one-time |
| Support the Developer | $1.99 | one-time |
| Support the Developer | $2.99 | one-time |
| Support the Developer | $4.99 | one-time |
| Support the Developer | $5.99 | one-time |
| Support the Developer | $7.99 | one-time |
| Support the Developer | $9.99 | one-time |
| Support the Developer | $12.99 | one-time |
| Support the Developer | $14.99 | one-time |
| Support the Developer | $19.99 | one-time |


## Frequently asked questions

### Is BMI Calculator free?

BMI Calculator is free to download, with no in-app purchases.

### Is Open Me First free?

Open Me First is free to download, with in-app purchases available.

### Do BMI Calculator or Open Me First have ads?

BMI Calculator shows ads; Open Me First does not.

### Which is updated more often, BMI Calculator or Open Me First?

BMI Calculator ships an update every 23 months, and Open Me First every 2 weeks. Most recently, BMI Calculator was updated on November 1, 2026 and Open Me First on October 25, 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.*