# Study Timer vs Cert Rogue 知識のダンジョン

The clearest difference is ads: Cert Rogue 知識のダンジョン at none against Study Timer's shown. Cert Rogue 知識のダンジョン also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (13.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Study Timer sells 5 in-app purchases, starting at $5.99 per year and Cert Rogue 知識のダンジョン sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Study Timer ships an update every 2 months, Cert Rogue 知識のダンジョン every 3 weeks. The most recent releases landed on October 19, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Study Timer | Cert Rogue 知識のダンジョン |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (13 ratings)](https://appshunter.io/ios/app/study-timer-focus-and-pomodoro/id6444372570/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 84.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 478 MB | 26 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [THOMSON Inc.](https://appshunter.io/developer/492371813) | [TAKESHI TAMEGAI](https://appshunter.io/developer/1896333216) |

## What reviewers say

### Study Timer

[App page](https://appshunter.io/ios/app/study-timer-focus-and-pomodoro/id6444372570)

Enhance your study habits and achieve deep focus with a powerful tracker and timer. Utilize the Pomodoro Technique, calming sounds, and automatic logging to stay motivated and productive. Ideal for students, professionals, and individuals managing ADHD.

**Highlights:** Pomodoro Focus Timer, Automatic Study Tracker, Natural Sounds & Lo-Fi BGM, Study Calendar & Graph View, Exam Countdown, Distraction-Free UI

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (annual) | $5.99 | per year |
| Premium (3-Month) | $7.99 | per 3 months |
| Premium (Yearly) | $15.99 | per year |
| Premium (lifetime) | $9.99 | one-time |
| Premium (Lifetime) | $29.99 | one-time |


### Cert Rogue 知識のダンジョン

[App page](https://appshunter.io/ios/app/cert-rogue/id6772684520)

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 世界史ダンジョン(歴検3級) | $1.99 | one-time |
| ITパスポート ダンジョン | $1.99 | one-time |
| 麻雀ダンジョン(役・点数計算) | $1.99 | one-time |
| AI-102 ダンジョン | $1.99 | one-time |
| 世界遺産検定2級 ダンジョン | $1.99 | one-time |
| 世界遺産検定1級 ダンジョン | $1.99 | one-time |
| 世界史ダンジョン(歴検2級) | $1.99 | one-time |
| 競馬データダンジョン | $1.99 | one-time |


## Frequently asked questions

### Is Study Timer free?

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

### Is Cert Rogue 知識のダンジョン free?

Cert Rogue 知識のダンジョン is free to download, with in-app purchases available.

### Do Study Timer or Cert Rogue 知識のダンジョン have ads?

Study Timer shows ads; Cert Rogue 知識のダンジョン does not.

### Which is updated more often, Study Timer or Cert Rogue 知識のダンジョン?

Study Timer ships an update every 2 months, and Cert Rogue 知識のダンジョン every 3 weeks. Most recently, Study Timer was updated on October 19, 2026 and Cert Rogue 知識のダンジョン on October 11, 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.*