# PDCA管理 vs タイムスタンプ ログ

The clearest difference is review sentiment: タイムスタンプ ログ at 64% against PDCA管理's 0%. タイムスタンプ ログ also leads on price (Free vs $3.99). PDCA管理's advantage is ads (none vs shown). On update cadence, in-app purchases, device support and iOS requirement there is nothing between them.

タイムスタンプ ログ is free to download; PDCA管理 costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PDCA管理 ships an update every 6 months, タイムスタンプ ログ every 7 months. The most recent releases landed on October 8, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | PDCA管理 | タイムスタンプ ログ |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 0.0% of reviews | **63.6% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 6 months** | Every 7 months |
| Monetization | Paid | **Ad-supported** |
| Size | 1 MB | 27 MB |
| Requires iOS | 18.0 | **17.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Satoshi Sato](https://appshunter.io/developer/1043844101) | [Green Speed Inc.](https://appshunter.io/developer/1504671073) |

## What reviewers say

### PDCA管理

[App page](https://appshunter.io/ios/app/pdca/id1384848623)

This app visualizes and shares information for all corporate activities, facilitating daily and goal-oriented improvement cycles. It supports the Plan-Do-Check-Action framework for efficient management and team collaboration.

**Highlights:** Visualize and share corporate activities, Support for daily and goal-oriented improvement cycles, Customizable categories for issues and themes, Progress tracking and status settings, Automated email generation for team sharing, Easy sharing of action plans via email, messenger, or AirDrop, Voice input for issues, themes, and action plans, Add action plans to device calendar

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

**In-app purchases:** none


### タイムスタンプ ログ

[App page](https://appshunter.io/ios/app/id1551745747)

This app allows you to easily record the current time, with entries automatically grouped by date for clarity. You can categorize and label your entries with custom colors, and sync data across iPhone and iPad via iCloud.

**Highlights:** Record current time easily, Group entries by date, Categorize and label entries, Assign colors to categories/labels, Automatic iCloud sync between devices

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PDCA管理 free?

PDCA管理 costs $3.99, with no in-app purchases.

### Is タイムスタンプ ログ free?

タイムスタンプ ログ is free to download, with no in-app purchases.

### Do PDCA管理 or タイムスタンプ ログ have ads?

タイムスタンプ ログ shows ads; PDCA管理 does not.

### Which is updated more often, PDCA管理 or タイムスタンプ ログ?

PDCA管理 ships an update every 6 months, and タイムスタンプ ログ every 7 months. Most recently, PDCA管理 was updated on October 8, 2026 and タイムスタンプ ログ on October 9, 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.*