Meet TubuLUFS, the ultimate real-time audio measurement app for YouTube, music streaming, and broadcasting!

TubuLUFS is an overlay audio meter that floats semi-transparently on your screen. It allows you to accurately monitor loudness (LUFS), frequency distribution (RTA), and stereo phase relationships in real time—even while watching videos, listening to music, or mixing audio.

Powered by a high-performance native engine, it minimizes battery consumption and system load while delivering seamless, ultra-low latency visual feedback.

1. Ultra-Precise LUFS Meter (Loudness Measurement)
Accurately analyzes the loudness normalization standards of major platforms like YouTube and Spotify.

Even if the playback app applies limiting, TubuLUFS displays the original, uncompromised loudness. For example, it will show the true volume of the source even if it exceeds YouTube's -14 LUFS limit.

2. High-Performance Real-Time Analyzer (RTA)
Features a precise 61-band, 1/6-octave filter bank to display frequencies with razor-sharp resolution.

Designed with a fast, delay-free response for low-end frequencies and sharp discrimination for mid-highs, allowing you to clearly visualize the main energy levels of your audio.

3. Stereoscope & Phase Meter
Monitors the stereo image width and phase relationships of the left and right channels through real-time graphics.

Instantly detects phase cancellation to ensure excellent mono compatibility, preventing your sound from losing clarity or getting muddy in mono environments.

4. Convenient Floating Overlay Widget
Provides a compact, semi-transparent widget that floats directly on top of other apps (like YouTube).

Toggle between mini and comprehensive modes with a single tap, allowing you to focus purely on metering without interrupting your screen workflow.

5. Absolute Measurement Independent of Device Volume
Adjusting your smartphone's physical volume buttons will not affect the absolute audio input values. It scientifically measures the true energy level of the source sound, regardless of your hardware volume settings.

Highly Recommended For:
Creators who want to verify if their audio balance and final loudness meet platform standards before uploading to YouTube.

Engineers & Producers who need to analyze how their mixed/mastered tracks will perform on streaming platforms within a mobile environment.

Audio Enthusiasts who want to visually enjoy precise frequency bands and sound pressure while listening to music.

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Additional Information