# BD vs VentLog

The clearest difference is iOS requirement: VentLog at 10.0 against BD's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

BD ships an update every 3 weeks, VentLog every 6 weeks. The most recent releases landed on October 29, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | BD | VentLog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Size | 59 MB | 1 MB |
| Requires iOS | 17.0 | **10.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Saint-Gobain](https://appshunter.io/developer/543924473) | [Intertisement](https://appshunter.io/developer/478293692) |

## What reviewers say

### BD

[App page](https://appshunter.io/ios/app/bd/id890889320)

**Features:** macOS Compatibility

**In-app purchases:** none


### VentLog

[App page](https://appshunter.io/ios/app/ventlog/id6448513171)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is BD free?

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

### Is VentLog free?

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

### Do BD or VentLog have ads?

Neither BD nor VentLog shows ads.

### Which is updated more often, BD or VentLog?

BD ships an update every 3 weeks, and VentLog every 6 weeks. Most recently, BD was updated on October 29, 2026 and VentLog on November 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.*