# LUXMAN Stream vs SEIMON

The clearest difference is in-app purchases: LUXMAN Stream at none against SEIMON's 2. LUXMAN Stream also leads on iOS requirement (13.0 vs 17.0). SEIMON's advantage is update cadence (every 3 weeks vs every 10 months) and device support. On price there is nothing between them.

Both are free to download. SEIMON sells 2 in-app purchases, starting at $3.99 per month. LUXMAN Stream asks for nothing beyond the download.

LUXMAN Stream ships an update every 10 months, SEIMON every 3 weeks. The most recent releases landed on September 13, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | LUXMAN Stream | SEIMON |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 10 months | **Every 3 weeks** |
| Size | 24 MB | 5 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [LUXMAN Corporation](https://appshunter.io/developer/423299420) | [Takahiro Endo](https://appshunter.io/developer/1878005918) |

## What reviewers say

### LUXMAN Stream

[App page](https://appshunter.io/ios/app/luxman-stream/id6450203317)

**In-app purchases:** none


### SEIMON

[App page](https://appshunter.io/ios/app/seimon/id6762163853)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 上級鑑定士ライセンス（月額） | $3.99 | per month |
| 上級鑑定士ライセンス（年額） | $29.99 | per year |


## Frequently asked questions

### Is LUXMAN Stream free?

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

### Is SEIMON free?

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

### Which is updated more often, LUXMAN Stream or SEIMON?

LUXMAN Stream ships an update every 10 months, and SEIMON every 3 weeks. Most recently, LUXMAN Stream was updated on September 13, 2026 and SEIMON on September 23, 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.*