Comparison

Surprised!ReactionTimeChecker? vs SpinnerSS

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

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.

Highlights
  • Sudden fear image display
  • Captures user's surprised photo
  • Sound effects in silent mode
  • Requires camera permission
  • Prank and surprise friends
Read full description

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 β€œContact Us” page on our website and send us an e-mail. Click here for β€œContact Us”: https://www.nscnet.jp/inquiry.html

About

SpinnerSS

Features
Read full description

A wheel spinner with secret controls! Pick the next result, change the odds and surprise your friends. Who's buying the drinks? Who goes first? Add your friends' names to SpinnerSS and set up a fun prank, a surprise reveal or a regular random draw. Pick who wins, or who to skip Choose the next result before you spin, or keep a particular entry from winning. Both controls are free. Pick your result, spin the wheel and enjoy your friends' reactions! Change the odds without changing the wheel (paid) Keep the slice sizes unchanged while adjusting each entry's chance of winning. The wheel looks ordinary, but you've set the odds. Plan the results of up to 20 spins (paid) Set the results in the order you want. Mix in random spins between your chosen results, or save a surprise for the final round. See the winner before the wheel stops Watch the winning slice glow as the wheel slows down. This free effect builds excitement as you wait for the result! Think it's over? Here comes the real result! (paid) A white flash, a dark screen, then the final result slowly appears. Or watch a wall crack open to reveal it! You can also freeze the screen in black and white before the wheel spins again. Add a rainbow result card and background for an even bigger finish! Press and hold START to open the secret controls Choose a feature on the dial, set your result or effect, then head back to the wheel. You're ready to spin! Your everyday spinner, with no ads Edit names, colors and slice sizes. Save your favorite wheels to use again. Pick a meal, choose a turn order or draw a game prompt at random. The basic wheel, choosing or avoiding a result, and the glowing winner effect are free. One in-app purchase unlocks all locked features, including odds adjustments, planned results and the extra reveal and rainbow effects. It's a one-time purchase, with no subscription.

Screenshots

Surprised!ReactionTimeChecker?3 screens
SpinnerSS4 screens

Verdict

The call

The clearest difference is in-app purchases: Surprised!ReactionTimeChecker? at none against SpinnerSS's 3. Surprised!ReactionTimeChecker? also leads on iOS requirement (15.6 vs 26.0). SpinnerSS's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 6 months). On price and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. SpinnerSS sells 3 one-off in-app purchases. Surprised!ReactionTimeChecker? asks for nothing beyond the download.

UpkeepUpdate frequency

Surprised!ReactionTimeChecker? ships an update every 6 months, SpinnerSS every 3 weeks. The most recent releases landed on October 23, 2026 and October 12, 2026 respectively.

Scorecard4 real differences Β· 4 level
Surprised!ReactionTimeChecker? versus SpinnerSS: the parameters behind the verdict, then further details
ParameterSurprised!ReactionTimeChecker?SpinnerSS
PriceFreeFree
Positive reviews100.0% of reviewsβ€”
Update frequencyEvery 6 monthsEvery 3 weeks β€” better
AdsYesNo β€” better
In-app purchasesNo β€” betterYes
MonetizationAd-supportedβ€”
DevicesiPhone, iPad, iPod β€” betteriPhone, iPad
Requires iOS15.6 β€” better26.0
Further details β€” not scored
Size24 MB32 MB
Age rating12+12+
DeveloperNSC, K.K.IDEA-RING Inc.

In-app purchases

None

Surprised!ReactionTimeChecker?

No in-app purchases

3 purchases

SpinnerSS

One-time3
  • Remove ads$0.99
  • εΊƒε‘Šιžθ‘¨η€Ί$0.99
  • Unlock All Star Dial Features$4.99

Questions

Is Surprised!ReactionTimeChecker? free?
Surprised!ReactionTimeChecker? is free to download, with no in-app purchases.
Is SpinnerSS free?
SpinnerSS is free to download, with in-app purchases available.
Do Surprised!ReactionTimeChecker? or SpinnerSS have ads?
Surprised!ReactionTimeChecker? shows ads; SpinnerSS does not.
Which is updated more often, Surprised!ReactionTimeChecker? or SpinnerSS?
Surprised!ReactionTimeChecker? ships an update every 6 months, and SpinnerSS every 3 weeks. Most recently, Surprised!ReactionTimeChecker? was updated on October 23, 2026 and SpinnerSS on October 12, 2026.

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