Features
A/B Looping
Press A to mark the start and B to mark the end; the player loops that range. Long-press to fine-tune the boundaries with millisecond precision.
VAD Auto-Segmentation
Silero-VAD voice-activity detection splits a recording into sentence-level segments automatically. Configurable max segment length.
Shadow Reading
Three phases: listen to the original → record yourself → align and score. Pronunciation (MFCC/formant DTW) and rhythm (RMS/F0) scoring, with Encouraging / Standard / Challenging presets.
Auto Intensive-Listening Workflow
One tap: segment → loop → shadow-score. Set loops per segment; the player advances to the next un-mastered segment automatically. Built for high-volume practice.
Fine-Grained Segment Editing
Split, merge, silence-trim, rate difficulty, mark mastery, add notes and translations. Every line is precisely managed; filter to drill only what you have not mastered.
WiFi Upload + Web Dictation
A built-in HTTP server: bulk-upload audio from your computer browser, or do dictation on the big screen while listening — phone and web stay in sync.
Learning Stats
Practice time, streaks, mastery progress, bottleneck segments, 30-day trends — quantify your progress.
Free vs Pro
One-time purchase
| Free | Pro | |
|---|---|---|
| Import / player / A-B loop / manual segments / waveform / lock-screen playback | Free | — |
| VAD auto-segmentation | Up to 15 / batch | Unlimited |
| LRC / subtitle import | Up to 15 / batch | Unlimited |
| Shadow reading scoring | 15 / batch | Unlimited |
| Dictation (phone + web) | Web dictation 10 min/day | Unlimited |
| Auto intensive-listening workflow | 15 / batch | Unlimited |
| WiFi bulk import | Once / 7 days | Unlimited |
| Shared-segment import | Own files unlimited; others 15 / batch | Unlimited |
| Silence trim / stats / mastery | — | ✓ |
| Full backup (export + restore) | Always free | — |