# BYLD vs FFMI Calc

The clearest difference is in-app purchases: FFMI Calc at none against BYLD's 2. FFMI Calc also leads on update cadence (every 5 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. BYLD sells 2 in-app purchases, starting at $2.99 per month. FFMI Calc asks for nothing beyond the download.

BYLD ships an update every 2 weeks, FFMI Calc every 5 days. The most recent releases landed on October 13, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | BYLD | FFMI Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 5 days** |
| Size | 64 MB | 1 MB |
| Requires iOS | **26.0** | 26.4 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [CEKA ARES E.E.](https://appshunter.io/developer/1385648479) | [Tomoharu Iseki](https://appshunter.io/developer/1863683948) |

## What reviewers say

### BYLD

[App page](https://appshunter.io/ios/app/byld-hypertrophy-tracker/id6759444916)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Byld Premium Monthly | $2.99 | per month |
| Byld Premium Monthly | $19.99 | per year |


### FFMI Calc

[App page](https://appshunter.io/ios/app/ffmi-calc/id6768256805)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BYLD free?

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

### Is FFMI Calc free?

FFMI Calc is free to download, with no in-app purchases.

### Do BYLD or FFMI Calc have ads?

Neither BYLD nor FFMI Calc shows ads.

### Which is updated more often, BYLD or FFMI Calc?

BYLD ships an update every 2 weeks, and FFMI Calc every 5 days. Most recently, BYLD was updated on October 13, 2026 and FFMI Calc on October 24, 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.*