# NAILS INC 公式アプリ vs PETRO

The clearest difference is update cadence: PETRO at every 9 days against NAILS INC 公式アプリ's every 2 months. PETRO also leads on device support (3 vs 1) and iOS requirement (14.0 vs 16.0). On price, 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.

NAILS INC 公式アプリ ships an update every 2 months, PETRO every 9 days. The most recent releases landed on October 10, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | NAILS INC 公式アプリ | PETRO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Size | 60 MB | 83 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TAT Inc.](https://appshunter.io/developer/475451965) | [G-tech International](https://appshunter.io/developer/1724934663) |

## What reviewers say

### NAILS INC 公式アプリ

[App page](https://appshunter.io/ios/app/nails-inc/id6446137854)

**Features:** Vision Pro support

**In-app purchases:** none


### PETRO

[App page](https://appshunter.io/ios/app/petro/id6758812287)

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

**In-app purchases:** none


## Frequently asked questions

### Is NAILS INC 公式アプリ free?

NAILS INC 公式アプリ is free to download, with no in-app purchases.

### Is PETRO free?

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

### Do NAILS INC 公式アプリ or PETRO have ads?

Neither NAILS INC 公式アプリ nor PETRO shows ads.

### Which is updated more often, NAILS INC 公式アプリ or PETRO?

NAILS INC 公式アプリ ships an update every 2 months, and PETRO every 9 days. Most recently, NAILS INC 公式アプリ was updated on October 10, 2026 and PETRO on October 9, 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.*