# SEIMON vs NoteDrops

The clearest difference is in-app purchases: NoteDrops at none against SEIMON's 2. SEIMON's advantage is update cadence (every 3 weeks vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

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

SEIMON ships an update every 3 weeks, NoteDrops every 6 weeks. The most recent releases landed on October 9, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | SEIMON | NoteDrops |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Size | 5 MB | 39 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Takahiro Endo](https://appshunter.io/developer/1878005918) | [Hideo Mizuno](https://appshunter.io/developer/1843010863) |

## What reviewers say

### 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 |


### NoteDrops

[App page](https://appshunter.io/ios/app/notedrops/id6796938487)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SEIMON free?

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

### Is NoteDrops free?

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

### Do SEIMON or NoteDrops have ads?

Neither SEIMON nor NoteDrops shows ads.

### Which is updated more often, SEIMON or NoteDrops?

SEIMON ships an update every 3 weeks, and NoteDrops every 6 weeks. Most recently, SEIMON was updated on October 9, 2026 and NoteDrops on October 20, 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.*