# Surprised!ReactionTimeChecker? vs ビックリ効果音

The clearest difference is update cadence: ビックリ効果音 at every 5 weeks against Surprised!ReactionTimeChecker?'s every 6 months. Surprised!ReactionTimeChecker?'s advantage is iOS requirement (15.6 vs 26.0). On price, review sentiment, ads and in-app purchases 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, ビックリ効果音 every 5 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Surprised!ReactionTimeChecker? | ビックリ効果音 |
| --- | --- | --- |
| 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 5 weeks** |
| Monetization | Ad-supported | — |
| Size | 24 MB | 33 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 9+ |
| Developer | [NSC, K.K.](https://appshunter.io/developer/501890400) | [Toshiyuki Susa](https://appshunter.io/developer/1556426603) |

## 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


### ビックリ効果音

[App page](https://appshunter.io/ios/app/id1570027366)

**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 ビックリ効果音 free?

ビックリ効果音 is free to download, with no in-app purchases.

### Do Surprised!ReactionTimeChecker? or ビックリ効果音 have ads?

Both Surprised!ReactionTimeChecker? and ビックリ効果音 show ads.

### Which is updated more often, Surprised!ReactionTimeChecker? or ビックリ効果音?

Surprised!ReactionTimeChecker? ships an update every 6 months, and ビックリ効果音 every 5 weeks. Most recently, Surprised!ReactionTimeChecker? was updated on October 23, 2026 and ビックリ効果音 on October 24, 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.*