# JPKI利用者ソフト vs Puzzle Cheat Sheet

The clearest difference is in-app purchases: JPKI利用者ソフト at none against Puzzle Cheat Sheet's 1. JPKI利用者ソフト also leads on iOS requirement (14.0 vs 17.0). Puzzle Cheat Sheet's advantage is update cadence (weekly vs every 6 months). On price, ads and device support there is nothing between them.

Both are free to download. Puzzle Cheat Sheet sells 1 one-off in-app purchase. JPKI利用者ソフト asks for nothing beyond the download.

JPKI利用者ソフト ships an update every 6 months, Puzzle Cheat Sheet weekly. The most recent releases landed on November 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | JPKI利用者ソフト | Puzzle Cheat Sheet |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 10.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | Free | — |
| Size | 7 MB | 2 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Japan Agency for Local Authority Information Systems](https://appshunter.io/developer/1481154804) | [Hayato Sato](https://appshunter.io/developer/1510795344) |

## 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


### Puzzle Cheat Sheet

[App page](https://appshunter.io/ios/app/puzzle-cheat-sheet/id6796991942)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| テーマパック | $2.99 | one-time |


## 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 Puzzle Cheat Sheet free?

Puzzle Cheat Sheet is free to download, with in-app purchases available.

### Do JPKI利用者ソフト or Puzzle Cheat Sheet have ads?

Neither JPKI利用者ソフト nor Puzzle Cheat Sheet shows ads.

### Which is updated more often, JPKI利用者ソフト or Puzzle Cheat Sheet?

JPKI利用者ソフト ships an update every 6 months, and Puzzle Cheat Sheet weekly. Most recently, JPKI利用者ソフト was updated on November 3, 2026 and Puzzle Cheat Sheet on October 10, 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.*