Comparison

風車 vs Surprised!ReactionTimeChecker?

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

Head to head
About

風車

Features
Read full description

ふ〜っと吹くと回る風車です。 優しく吹くとゆっくり回り、沢山吹くと勢いよく回ります。 一人遊びで癒されてみたり、みんなで息が続く限り吹きまくったり。 背景を変えて気分転換。いろんな場所で回しましょう。 背景を変更できます。 ・カメラのライブ映像 ・黒または白 ・フォトライブラリーから選んだ写真 風車の数を変更できます。 ・5つまでの風車を同時に回せます ・それぞれの回転方向を変えられます 風車の画像を変更できます。 ・風車(ピンク) ・風車(グリーン) ・風車(モノトーン) ・風車(イエロー) ・風車(パープル) ピンチイン、ピンチアウトで風車の大きさを変更できます。

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

Screenshots

風車4 screens
Surprised!ReactionTimeChecker?3 screens

Verdict

The call

The clearest difference is update cadence: 風車 at every 3 months against Surprised!ReactionTimeChecker?'s every 6 months. 風車 also leads on iOS requirement (10.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

風車 ships an update every 3 months, Surprised!ReactionTimeChecker? every 6 months. Both last shipped on November 1, 2026.

Scorecard2 real differences · 6 level
風車 versus Surprised!ReactionTimeChecker?: the parameters behind the verdict, then further details
Parameter風車Surprised!ReactionTimeChecker?
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 3 months — betterEvery 6 months
AdsYesYes
In-app purchasesNoNo
Monetization—Ad-supported
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS10.0 — better15.6
Further details — not scored
Size25 MB24 MB
Age rating4+12+
DeveloperKeietsu YasuharaNSC, K.K.

In-app purchases

None

風車

No in-app purchases

None

Surprised!ReactionTimeChecker?

No in-app purchases

Questions

Is 風車 free?
風車 is free to download, with no in-app purchases.
Is Surprised!ReactionTimeChecker? free?
Surprised!ReactionTimeChecker? is free to download, with no in-app purchases.
Do 風車 or Surprised!ReactionTimeChecker? have ads?
Both 風車 and Surprised!ReactionTimeChecker? show ads.
Which is updated more often, 風車 or Surprised!ReactionTimeChecker??
風車 ships an update every 3 months, and Surprised!ReactionTimeChecker? every 6 months. Most recently, 風車 was updated on November 1, 2026 and Surprised!ReactionTimeChecker? on November 1, 2026.

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