# Vulcano Buono vs ONE SIZE

The clearest difference is update cadence: Vulcano Buono at weekly against ONE SIZE's every 4 weeks. ONE SIZE'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. Neither carries in-app purchases, so what you see is what you pay.

Vulcano Buono ships an update weekly, ONE SIZE every 4 weeks. The most recent releases landed on October 8, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Vulcano Buono | ONE SIZE |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 4 weeks |
| Size | 65 MB | 31 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GENERAZIONE AI S.R.L.](https://appshunter.io/developer/1805137195) | [ANDREA DI MARI](https://appshunter.io/developer/6792527130) |

## What reviewers say

### Vulcano Buono

[App page](https://appshunter.io/ios/app/vulcano-buono/id6743934128)

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

**In-app purchases:** none


### ONE SIZE

[App page](https://appshunter.io/ios/app/one-size/id6792527128)

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

**In-app purchases:** none


## Frequently asked questions

### Is Vulcano Buono free?

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

### Is ONE SIZE free?

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

### Do Vulcano Buono or ONE SIZE have ads?

Neither Vulcano Buono nor ONE SIZE shows ads.

### Which is updated more often, Vulcano Buono or ONE SIZE?

Vulcano Buono ships an update weekly, and ONE SIZE every 4 weeks. Most recently, Vulcano Buono was updated on October 8, 2026 and ONE SIZE on October 3, 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.*