# Soliton KeyManager vs eYACHO Viewer 6

The clearest difference is update cadence: eYACHO Viewer 6 at monthly against Soliton KeyManager's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Soliton KeyManager ships an update every 6 months, eYACHO Viewer 6 monthly. The most recent releases landed on January 26, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Soliton KeyManager | eYACHO Viewer 6 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Size | 6 MB | 276 MB |
| Requires iOS | **13.0** | 13.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Soliton Systems K.K.](https://appshunter.io/developer/400872810) | [MetaMoJi Corporation](https://appshunter.io/developer/449808118) |

## What reviewers say

### Soliton KeyManager

[App page](https://appshunter.io/ios/app/soliton-keymanager/id687214387)

**In-app purchases:** none


### eYACHO Viewer 6

[App page](https://appshunter.io/ios/app/eyacho-viewer-6/id1574412137)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Soliton KeyManager free?

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

### Is eYACHO Viewer 6 free?

eYACHO Viewer 6 is free to download, with no in-app purchases.

### Do Soliton KeyManager or eYACHO Viewer 6 have ads?

Neither Soliton KeyManager nor eYACHO Viewer 6 shows ads.

### Which is updated more often, Soliton KeyManager or eYACHO Viewer 6?

Soliton KeyManager ships an update every 6 months, and eYACHO Viewer 6 monthly. Most recently, Soliton KeyManager was updated on January 26, 2026 and eYACHO Viewer 6 on September 17, 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.*