Surprised!ReactionTimeChecker? vs VOICEMO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Surprised!ReactionTimeChecker?
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.
- Sudden fear image display
- Captures user's surprised photo
- Sound effects in silent mode
- Requires camera permission
- Prank and surprise friends
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This app " Surprised! Reaction Time Checker?” is not an app to measure reflexes. When playing in a game that measures reflexes, it suddenly displays a fear image, and it is a surprise app to take a picture of the player of that moment. Surprise your friends, lovers and family and get their photos! You may get a photo of the surprised look of a yearning person ... *This application has sound effects even in silent mode. *In order to use the camera function to take photos, you need "Camera" and "Add photos only" permission to use this app. *Please check the photos taken with the "Photos" app. *Shaking the device violently can cause photos to be blurred. *Be aware that the player is surprised and may break the device. *Even if the user uses this game, the user or a third party other than the user, equipment, or even if there is a case where damage or a failure has occurred in human relations, we do not have any responsibility. *If you are using iOS 14.5 or later, a dialog asking for tracking permission will be displayed at the first startup. Production: NSC, K.K. If you have any problems or requests, please check the contents of the “Contact Us” page on our website and send us an e-mail. Click here for “Contact Us”: https://www.nscnet.jp/inquiry.html
VOICEMO
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Output file ■Effects •Reverb •Gain •Pitch •Speed •Distortion •Filter(low, high)
Screenshots
Verdict
Surprised!ReactionTimeChecker? and VOICEMO are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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, VOICEMO every 4 months. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.
| Parameter | Surprised!ReactionTimeChecker? | VOICEMO |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 6 months | Every 4 months — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 14.1 — better |
| Further details — not scored | ||
| Size | 24 MB | 4 MB |
| Age rating | 12+ | 4+ |
| Developer | NSC, K.K. | kohei yamane |
In-app purchases
Surprised!ReactionTimeChecker?
No in-app purchases
VOICEMO
No in-app purchases
Questions
Is Surprised!ReactionTimeChecker? free?
Is VOICEMO free?
Do Surprised!ReactionTimeChecker? or VOICEMO have ads?
Which is updated more often, Surprised!ReactionTimeChecker? or VOICEMO?
Other comparisons
