# 割引き計算くん vs Pottery Mark Identifier

The clearest difference is in-app purchases: 割引き計算くん at none against Pottery Mark Identifier's 2. Pottery Mark Identifier's advantage is update cadence (every 9 days vs every 173 months) and device support. On price there is nothing between them.

Both are free to download. Pottery Mark Identifier sells 2 in-app purchases, starting at $3.99 per 7 days. 割引き計算くん asks for nothing beyond the download.

割引き計算くん ships an update every 173 months, Pottery Mark Identifier every 9 days. The most recent releases landed on September 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 割引き計算くん | Pottery Mark Identifier |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pottery-mark-identifier/id6758070018/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 173 months | **Every 9 days** |
| Size | 3 MB | 42 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ryota Murakami](https://appshunter.io/developer/405946284) | [EternalBeam Software](https://appshunter.io/developer/1795031062) |

## What reviewers say

### 割引き計算くん

[App page](https://appshunter.io/ios/app/id405946281)

**In-app purchases:** none


### Pottery Mark Identifier

[App page](https://appshunter.io/ios/app/pottery-mark-identifier/id6758070018)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $3.99 | per 7 days |
| Premium Yearly | $34.99 | per year |


## Frequently asked questions

### Is 割引き計算くん free?

割引き計算くん is free to download, with no in-app purchases.

### Is Pottery Mark Identifier free?

Pottery Mark Identifier is free to download, with in-app purchases available.

### Which is updated more often, 割引き計算くん or Pottery Mark Identifier?

割引き計算くん ships an update every 173 months, and Pottery Mark Identifier every 9 days. Most recently, 割引き計算くん was updated on September 19, 2026 and Pottery Mark Identifier on October 24, 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.*