# BTワットチェッカー vs Leather Inventory

The clearest difference is in-app purchases: BTワットチェッカー at none against Leather Inventory's 1. BTワットチェッカー also leads on device support (3 vs 1) and iOS requirement (15.6 vs 18.0). Leather Inventory's advantage is update cadence (every 6 days vs every 3 months). On price and ads there is nothing between them.

Both are free to download. Leather Inventory sells 1 one-off in-app purchase. BTワットチェッカー asks for nothing beyond the download.

BTワットチェッカー ships an update every 3 months, Leather Inventory every 6 days. The most recent releases landed on September 9, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | BTワットチェッカー | Leather Inventory |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 days** |
| Size | 3 MB | 17 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [RATOC Systems, Inc.](https://appshunter.io/developer/568725272) | [Brett Gneiting](https://appshunter.io/developer/969850873) |

## What reviewers say

### BTワットチェッカー

[App page](https://appshunter.io/ios/app/bt/id1490362165)

**Features:** macOS Compatibility

**In-app purchases:** none


### Leather Inventory

[App page](https://appshunter.io/ios/app/leather-inventory/id6745101557)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $5.99 | one-time |


## Frequently asked questions

### Is BTワットチェッカー free?

BTワットチェッカー is free to download, with no in-app purchases.

### Is Leather Inventory free?

Leather Inventory is free to download, with in-app purchases available.

### Do BTワットチェッカー or Leather Inventory have ads?

Neither BTワットチェッカー nor Leather Inventory shows ads.

### Which is updated more often, BTワットチェッカー or Leather Inventory?

BTワットチェッカー ships an update every 3 months, and Leather Inventory every 6 days. Most recently, BTワットチェッカー was updated on September 9, 2026 and Leather Inventory on September 11, 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.*