BeatDropX
50ms Precision Rhythm Engine
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
±50ms precision × 4-lane engine × smart onset detection. A local rhythm game built for beat lovers.
BeatDropX is built on a professional-grade rhythm engine architecture, designed for players who demand precision.
Technical Specifications:
• Judgement accuracy: Perfect ±50ms / Good ±100ms / Miss ±150ms
• Rendering engine: SpriteKit at 60fps real-time note fall
• Audio-visual sync: AVAudioPlayer sampleTime-driven, frame-level alignment
• Haptic system: CoreHaptics CHHapticEngine + UIImpactFeedbackGenerator dual-channel
Beatmap System:
• 3 built-in tracks (120/140/160 BPM), SplitMix64 PRNG for reproducibility
• Difficulty scaling: Easy 1 note/beat, Normal 2/beat, Hard 4/beat + 18% chords
• User import: AVAudioFile frame-level RMS differential + adaptive threshold onset detection
• Auto-generates Easy/Normal difficulty beatmaps for imported songs
Scoring Mechanics:
• Perfect 1000pts / Good 500pts / Miss 0pts
• Combo bonus: +5% per 10-hit streak, capped at +50%
• S/A/B/C/D rank system (≥95% accuracy = S rank)
• UserDefaults-persisted personal best records
Interface & Adaptation:
• SwiftUI + SpriteKit hybrid architecture
• iPad adaptive layout (lane max width 500pt)
• TimelineView-driven beat-breathing background animation
• Runtime bilingual switching (dynamic Bundle lproj loading)
Privacy:
• Zero network requests, zero third-party SDKs
• No data upload, 100% offline operation
• Delete the app to delete all data
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
The developer, 应龙 张, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 应龙 张
- Size
- 846.8 KB
- Category
- Games
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Simplified Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2026. zhangYinglong # 版权信息