# 偉人の習慣 vs 倍速時計

The clearest difference is in-app purchases: 偉人の習慣 at none against 倍速時計's 1. 偉人の習慣 also leads on update cadence (every 8 days vs every 3 weeks) and iOS requirement (9.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. 倍速時計 sells 1 one-off in-app purchase. 偉人の習慣 asks for nothing beyond the download.

偉人の習慣 ships an update every 8 days, 倍速時計 every 3 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 偉人の習慣 | 倍速時計 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 3 weeks |
| Size | 36 MB | 2 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [C3reve Inc.](https://appshunter.io/developer/1271265424) | [Maho Ishikawa](https://appshunter.io/developer/6793993796) |

## What reviewers say

### 偉人の習慣

[App page](https://appshunter.io/ios/app/id1597272516)

**Features:** macOS Compatibility

**In-app purchases:** none


### 倍速時計

[App page](https://appshunter.io/ios/app/id6793993794)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro（買い切り） | $1.99 | one-time |


## Frequently asked questions

### Is 偉人の習慣 free?

偉人の習慣 is free to download, with no in-app purchases.

### Is 倍速時計 free?

倍速時計 is free to download, with in-app purchases available.

### Do 偉人の習慣 or 倍速時計 have ads?

Neither 偉人の習慣 nor 倍速時計 shows ads.

### Which is updated more often, 偉人の習慣 or 倍速時計?

偉人の習慣 ships an update every 8 days, and 倍速時計 every 3 weeks. Most recently, 偉人の習慣 was updated on October 27, 2026 and 倍速時計 on October 25, 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.*