# Bio vs BrewMeter

The clearest difference is update cadence: BrewMeter at weekly against Bio's every 2 months. Bio's advantage is iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Bio sells 3 in-app purchases, starting at $1.99 per 7 days and BrewMeter sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Bio ships an update every 2 months, BrewMeter weekly. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Bio | BrewMeter |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | — | Freemium |
| Size | 42 MB | 6 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Ferrer](https://appshunter.io/developer/1801518132) | [Benjamin Dupin](https://appshunter.io/developer/1871474236) |

## What reviewers say

### Bio

[App page](https://appshunter.io/ios/app/bio-rhythm-caffeine-tracker/id6756811259)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| weekly subscrition | $1.99 | per 7 days |
| monthly subscrition | $5.99 | per month |
| yearly subscription | $29.99 | per year |


### BrewMeter

[App page](https://appshunter.io/ios/app/brewmeter-caffeine-tracker/id6760132566)

Track your daily caffeine intake by logging drinks and their volumes. Visualize your caffeine levels with an estimated curve and explore historical data. Gain insights into your consumption habits for personal awareness.

**Highlights:** Log custom drinks with label data, Track volume consumed, Estimated caffeine curve visualization, Daily caffeine-free day recording, Undo accidental logs, CSV export (Pro), Apple Health integration (Pro)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BrewMeter Pro Lifetime | $5.99 | one-time |


## Frequently asked questions

### Is Bio free?

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

### Is BrewMeter free?

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

### Do Bio or BrewMeter have ads?

Neither Bio nor BrewMeter shows ads.

### Which is updated more often, Bio or BrewMeter?

Bio ships an update every 2 months, and BrewMeter weekly. Most recently, Bio was updated on October 13, 2026 and BrewMeter on October 7, 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.*