# LogCalendar vs 集中読書

The clearest difference is price: 集中読書 at Free against LogCalendar's $0.99. 集中読書 also leads on update cadence (every 11 days vs every 6 months). LogCalendar's advantage is in-app purchases (none vs 2) and device support (4 vs 1). On review sentiment, ads and iOS requirement there is nothing between them.

集中読書 is free to download; LogCalendar costs $0.99 up front. 集中読書 sells 2 in-app purchases, starting at $1.99 per month. LogCalendar asks for nothing beyond the download.

LogCalendar ships an update every 6 months, 集中読書 every 11 days. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | LogCalendar | 集中読書 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/logcalendar-time-tracker/id1016292838/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 64.9% of reviews | **66.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 11 days** |
| Monetization | Paid | — |
| Size | 2 MB | 44 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [iLeaf](https://appshunter.io/developer/358073023) | [QOOQ inc.](https://appshunter.io/developer/446639722) |

## What reviewers say

### LogCalendar

[App page](https://appshunter.io/ios/app/logcalendar-time-tracker/id1016292838)

Easily track your daily activities by logging them directly to your iOS Calendar with a single tap. Visualize your time usage with detailed graphs and manage your tasks efficiently.

**Highlights:** One-tap start/end tracking, Records to iOS Calendar, Color-coded calendars, Editable recorded events, Customizable task buttons, Day/week/month/year graphs, Apple Watch support

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### 集中読書

[App page](https://appshunter.io/ios/app/id6759477350)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月間サブスクリプション | $1.99 | per month |
| 買い切り | $9.99 | one-time |


## Frequently asked questions

### Is LogCalendar free?

LogCalendar costs $0.99, with no in-app purchases.

### Is 集中読書 free?

集中読書 is free to download, with in-app purchases available.

### Do LogCalendar or 集中読書 have ads?

Neither LogCalendar nor 集中読書 shows ads.

### Which is updated more often, LogCalendar or 集中読書?

LogCalendar ships an update every 6 months, and 集中読書 every 11 days. Most recently, LogCalendar was updated on November 6, 2026 and 集中読書 on November 5, 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.*