# BioGreen vs passwhistle

BioGreen and passwhistle are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

BioGreen ships an update every 2 months, passwhistle every 6 weeks. The most recent releases landed on October 4, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | BioGreen | passwhistle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Size | 56 MB | 40 MB |
| Requires iOS | 15.5 | **15.1** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [ENAY ENERJI GIDA ANONIM SIRKETI](https://appshunter.io/developer/1745053728) | [KAM INOVASYON BILISIM REKLAMCILIK A.S.](https://appshunter.io/developer/866563278) |

## What reviewers say

### BioGreen

[App page](https://appshunter.io/ios/app/biogreen/id6502336257)

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

**In-app purchases:** none


### passwhistle

[App page](https://appshunter.io/ios/app/passwhistle/id6769729497)

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

**In-app purchases:** none


## Frequently asked questions

### Is BioGreen free?

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

### Is passwhistle free?

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

### Do BioGreen or passwhistle have ads?

Neither BioGreen nor passwhistle shows ads.

### Which is updated more often, BioGreen or passwhistle?

BioGreen ships an update every 2 months, and passwhistle every 6 weeks. Most recently, BioGreen was updated on October 4, 2026 and passwhistle on October 10, 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.*