Deci Duel
Voice Volume Duel Game
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
The real voice-volume showdown — DeciDuel!
Shout, measure, and win! DeciDuel is a voice battle game where you compete head-to-head using your phone's microphone to measure decibels (dB) in real time.
■ Real-Time 1v1 Voice Duels
- Challenge friends or get matched with players worldwide
- Compete across 3 rounds — loudest voice wins
- Live waveform visuals and dB readouts keep every round intense
■ Solo Measure Mode
- Shout for 5 seconds to record your personal best dB
- Instantly compare your best, latest, and previous scores
- Practice daily and push past your own limits
■ Voice Diary
- Every measurement is automatically logged to your calendar
- Color-coded dB levels show your daily condition at a glance
- Monthly stats (days recorded, average/highest dB) track your growth
■ Global Leaderboard
- Compete against players around the world
- Climb to #1 and show off your record to friends
■ Quick & Easy Sign-In
- Sign in instantly with Apple, Google, or Kakao
- No complicated setup — start shouting in seconds
Whether you're blowing off steam or hosting a fun party game with friends, DeciDuel turns your voice into the ultimate competition.
Shout it. Measure it. Win it. — DECIDUEL
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Hear yourself in your diary
Replay the recording from your solo measurements right in your diary.
- Sound effects + haptic feedback
Added sounds for countdown and round results, plus a vibration cue.
You can turn these on/off in Settings.
- Diary screen polish
Cleaner layout for moods and measurements.
- Stability improvements
The developer, MinHyeok Lee, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- User Content
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- MinHyeok Lee
- Size
- 48.7 MB
- Category
- Casual
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Frequent
Contests
Contains
Advertising
User-Generated Content
- Copyright
- © 2026 MinHyeok Lee