# BMI calculator vs Gain Weight

The clearest difference is iOS requirement: Gain Weight at 16.4 against BMI calculator's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. BMI calculator sells 2 in-app purchases, starting at $0.99 per 7 days and Gain Weight sells 3 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

BMI calculator ships an update every 6 weeks, Gain Weight monthly. The most recent releases landed on October 25, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | BMI calculator | Gain Weight |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Size | 28 MB | 80 MB |
| Requires iOS | 26.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jeronimo Landauer](https://appshunter.io/developer/1803922448) | [Max Mannstein](https://appshunter.io/developer/1695910526) |

## What reviewers say

### BMI calculator

[App page](https://appshunter.io/ios/app/bmi-calculator-weightnote/id6754455726)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $0.99 | per 7 days |
| Yearly Access | $14.99 | per year |


### Gain Weight

[App page](https://appshunter.io/ios/app/gain-weight-ubulk/id6790460135)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UBulk Pro Monthly | $5.99 | per month |
| UBulk Pro Weekly | $5.99 | per 7 days |
| UBulk Pro Yearly | $34.99 | per year |


## Frequently asked questions

### Is BMI calculator free?

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

### Is Gain Weight free?

Gain Weight is free to download, with in-app purchases available.

### Do BMI calculator or Gain Weight have ads?

Neither BMI calculator nor Gain Weight shows ads.

### Which is updated more often, BMI calculator or Gain Weight?

BMI calculator ships an update every 6 weeks, and Gain Weight monthly. Most recently, BMI calculator was updated on October 25, 2026 and Gain Weight on November 1, 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.*