# Bio Log vs SilentStar Breath

The clearest difference is update cadence: SilentStar Breath at every 11 days against Bio Log's every 3 weeks. SilentStar Breath also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Bio Log sells 1 in-app purchase, starting at $3.99 per month and SilentStar Breath sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Bio Log ships an update every 3 weeks, SilentStar Breath every 11 days. The most recent releases landed on October 31, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Bio Log | SilentStar Breath |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/bio-log-peptide-tracker/id6773158529/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 11 days** |
| Monetization | Freemium | — |
| Size | 5 MB | 90 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [alexander rieger](https://appshunter.io/developer/1839352038) | [SilentStar Group](https://appshunter.io/developer/6807820994) |

## What reviewers say

### Bio Log

[App page](https://appshunter.io/ios/app/bio-log-peptide-tracker/id6773158529)

This app helps you meticulously track peptide doses, vial details, and personal notes in a centralized journal. It offers daily views, logging capabilities, and history search, with optional AI assistance for summaries and organization. Records are stored locally for your control.

**Highlights:** Schedule and dose tracking, Vial inventory management, Injection site mapping, Journal search and filtering, AI-powered note organization, Local data storage, Data export

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bio Log Membership | $3.99 | per month |


### SilentStar Breath

[App page](https://appshunter.io/ios/app/silentstar-breath/id6811094663)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SilentStar Breath - Monthly | $3.99 | per month |
| SilentStar Breath - Monthly | $19.99 | per year |


## Frequently asked questions

### Is Bio Log free?

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

### Is SilentStar Breath free?

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

### Do Bio Log or SilentStar Breath have ads?

Neither Bio Log nor SilentStar Breath shows ads.

### Which is updated more often, Bio Log or SilentStar Breath?

Bio Log ships an update every 3 weeks, and SilentStar Breath every 11 days. Most recently, Bio Log was updated on October 31, 2026 and SilentStar Breath 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.*