# 鬼から電話 vs Study Time Logger

The clearest difference is rating: Study Time Logger at 4.8 against 鬼から電話's 4.0. Study Time Logger also leads on review sentiment (93% vs 57%) and ads (none vs shown). On price, ratings volume, update cadence and in-app purchases there is nothing between them.

Both are free to download. 鬼から電話 sells 10 one-off in-app purchases and Study Time Logger sells 7 in-app purchases, starting at $3.49 per month. Whichever you choose, the download price is not the number that matters.

Study Time Logger holds the better App Store score, 4.8 against 4.0. Both are backed by a comparable volume of ratings — 43 and 119 respectively. Written reviews point the same way: 57% of 鬼から電話's written reviews are positive against 93% of Study Time Logger's.

鬼から電話 ships an update every 4 weeks, Study Time Logger fortnightly. Both last shipped on October 26, 2026.

## The numbers

| Metric | 鬼から電話 | Study Time Logger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (43 ratings)](https://appshunter.io/ios/app/id566799704/reviews) | **[4.8 (119 ratings)](https://appshunter.io/ios/app/study-time-logger/id1387759250/reviews)** |
| Number of ratings | 43 | **119** |
| Positive reviews | 56.7% of reviews | **92.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 167 MB | 50 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [MediaActive Inc.](https://appshunter.io/developer/566799707) | [bondavi Inc.](https://appshunter.io/developer/805401904) |

## What reviewers say

### 鬼から電話

[App page](https://appshunter.io/ios/app/id566799704)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Doesn't like vegetables | $0.99 | one-time |
| Mean acts | $0.99 | one-time |
| Calls from Santa Claus | $0.99 | one-time |
| Hates to have a meal | $0.99 | one-time |
| Dad lies around at home | $0.99 | one-time |
| Told a lie (Oni) | $0.99 | one-time |
| Does not listen (Ochiyo the ghost) | $0.99 | one-time |
| Hates to sleep (Momo-chin the fairy) | $0.99 | one-time |
| Did a bad deed (Witch) | $0.99 | one-time |
| 200Point | $0.99 | one-time |


### Study Time Logger

[App page](https://appshunter.io/ios/app/study-time-logger/id1387759250)

Boost concentration and manage your time effectively with a timer-based technique. This app helps you stay on track during study or work sessions, offering customizable timers and tools to review your progress and learn focus psychology.

**Highlights:** Customizable Pomodoro timers, Task categorization and time management, Visual progress review with graphs, Focus psychology tips and articles, Flexible timer and break durations

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dramatically timer pause | $3.49 | per month |
| 応援コメントがラップ調 ｜無駄機能 | $6.99 | per month |
| 応援コメントが名言風 ｜無駄機能 | $6.99 | per month |
| 無駄機能｜ドラマティックに一時停止 | $2.99 | one-time |
| Unnecessarily Detailed Data | $5.99 | one-time |
| 無駄機能｜応援コメントが名言風 | $5.99 | one-time |
| 無駄機能｜応援コメントがラップ調 | $5.99 | one-time |


## Frequently asked questions

### Is 鬼から電話 free?

鬼から電話 is free to download, with in-app purchases available.

### Is Study Time Logger free?

Study Time Logger is free to download, with in-app purchases available.

### Which has better reviews, 鬼から電話 or Study Time Logger?

Study Time Logger is rated higher. 鬼から電話 averages 4.0 out of 5 from 43 ratings, while Study Time Logger averages 4.8 from 119 ratings.

### Do 鬼から電話 or Study Time Logger have ads?

鬼から電話 shows ads; Study Time Logger does not.

### Which is updated more often, 鬼から電話 or Study Time Logger?

鬼から電話 ships an update every 4 weeks, and Study Time Logger fortnightly. Most recently, 鬼から電話 was updated on October 26, 2026 and Study Time Logger on October 26, 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.*