# Surprised!ReactionTimeChecker? vs ドッキリ看板

The clearest difference is iOS requirement: ドッキリ看板 at 11.0 against Surprised!ReactionTimeChecker?'s 15.6. On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Surprised!ReactionTimeChecker? ships an update every 6 months, ドッキリ看板 every 3 months. The most recent releases landed on October 23, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Surprised!ReactionTimeChecker? | ドッキリ看板 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | Ad-supported | — |
| Size | 24 MB | 32 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [NSC, K.K.](https://appshunter.io/developer/501890400) | [Kazunari Minami](https://appshunter.io/developer/1462613642) |

## What reviewers say

### Surprised!ReactionTimeChecker?

[App page](https://appshunter.io/ios/app/surprisedreactiontimechecker/id553393907)

This app captures photos of users when they are startled by sudden fear images. It's designed for playful pranks to surprise friends and family, documenting their genuine reactions. Note that it utilizes sound effects even in silent mode and requires camera permissions.

**Highlights:** Sudden fear image display, Captures user's surprised photo, Sound effects in silent mode, Requires camera permission, Prank and surprise friends

**In-app purchases:** none


### ドッキリ看板

[App page](https://appshunter.io/ios/app/id1462613643)

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

**In-app purchases:** none


## Frequently asked questions

### Is Surprised!ReactionTimeChecker? free?

Surprised!ReactionTimeChecker? is free to download, with no in-app purchases.

### Is ドッキリ看板 free?

ドッキリ看板 is free to download, with no in-app purchases.

### Do Surprised!ReactionTimeChecker? or ドッキリ看板 have ads?

Both Surprised!ReactionTimeChecker? and ドッキリ看板 show ads.

### Which is updated more often, Surprised!ReactionTimeChecker? or ドッキリ看板?

Surprised!ReactionTimeChecker? ships an update every 6 months, and ドッキリ看板 every 3 months. Most recently, Surprised!ReactionTimeChecker? was updated on October 23, 2026 and ドッキリ看板 on October 29, 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.*