correct vs Shake Judge
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
correct
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βCorrectβ lets you play sound effects for Correct, Wrong, Winner, and Loser with one tap. Perfect for teachers, quizzes, games, or presentations. Make reactions more fun with sound!
Shake Judge
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If you shake it, you will make a sound! Ping Pong Ping Pong! Boo Boo! β How to use There is a YES / NO screen in the initial setting. You can switch by swiping horizontally. If you shake the terminal while the YES screen is displayed, you will make a ping-pong ping-pong sound. If you shake the terminal with the NO screen displayed, you will make a boo-boo sound. By the way, even if you tap the character part, the sound will be made. You can also customize it in the settings. γ» Tutorial display / non-display γ» Function to prevent continuous sound γ» Change the background color γ» Change text γ» Change the sound β How to enjoy For example, when taking a quiz with someone you know. You can easily give the correct and incorrect answers to the quiz by sound. For example, when you want to teach your child what is good and what is not. If you do good things, ring a ping pong. if you do bad things, ring a boo boo, It may be easy to impress children. Please enjoy it in various ways. β Another way to enjoy With this application, you can record and use voice. Since the text can be changed freely, not only the judgment but also "Funny", "Stop", etc. You can use it freely. It might be even more fun if you record your friend's voice and use it. β Notes Please cooperate in avoiding acts that may cause inconvenience to people, such as making noises. β Function γ» Shake to make a sound γ» Press the button to make a sound γ» Change color γ» Sound change γ» Change text γ» Make sound
Screenshots
Verdict
The clearest difference is iOS requirement: Shake Judge at 15.6 against correct's 17.6. On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
correct ships an update every 6 months, Shake Judge every 5 months. The most recent releases landed on June 20, 2026 and September 8, 2026 respectively.
| Parameter | correct | Shake Judge |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 months | Every 5 months β better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod β better |
| Requires iOS | 17.6 | 15.6 β better |
| Further details β not scored | ||
| Size | 4 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | hiromu izuwa | Yusaku Maki |
In-app purchases
correct
No in-app purchases
Shake Judge
No in-app purchases









