# JPKI利用者ソフト vs Octovigintuple Calc

The clearest difference is ads: JPKI利用者ソフト at none against Octovigintuple Calc's shown. Octovigintuple Calc's advantage is update cadence (every 2 weeks vs every 6 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

JPKI利用者ソフト ships an update every 6 months, Octovigintuple Calc every 2 weeks. The most recent releases landed on September 24, 2026 and August 6, 2026 respectively.

## The numbers

| Metric | JPKI利用者ソフト | Octovigintuple Calc |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 10.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 7 MB | 36 MB |
| Requires iOS | **14.0** | 15.8.3 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Japan Agency for Local Authority Information Systems](https://appshunter.io/developer/1481154804) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### JPKI利用者ソフト

[App page](https://appshunter.io/ios/app/jpki/id1481154805)

This app allows users to view and verify the validity of digital certificates on their My Number Card using an iPhone. It also provides functionality to change passwords and receive notifications for certificate expiration.

**Highlights:** View digital certificate details, Verify certificate validity, Change passwords, Receive expiration notifications, Check certificate expiration dates

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

**In-app purchases:** none


### Octovigintuple Calc

[App page](https://appshunter.io/ios/app/octovigintuple-calc/id6742526512)

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

**In-app purchases:** none


## Frequently asked questions

### Is JPKI利用者ソフト free?

JPKI利用者ソフト is free to download, with no in-app purchases.

### Is Octovigintuple Calc free?

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

### Do JPKI利用者ソフト or Octovigintuple Calc have ads?

Octovigintuple Calc shows ads; JPKI利用者ソフト does not.

### Which is updated more often, JPKI利用者ソフト or Octovigintuple Calc?

JPKI利用者ソフト ships an update every 6 months, and Octovigintuple Calc every 2 weeks. Most recently, JPKI利用者ソフト was updated on September 24, 2026 and Octovigintuple Calc on August 6, 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.*