User Guide

PicoPhrase helps you study a video one subtitle sentence at a time. Your videos, subtitles, progress, collections, settings, and cached explanations stay on your device.

1. Choose a video

• Local video: choose a folder containing a video and matching SRT or VTT subtitle files.
• YouTube video: accept the YouTube notice, paste a YouTube link, then import or paste SRT/VTT subtitles. PicoPhrase does not automatically download YouTube subtitles in the Play release.

2. Main controls

• ⏮ Previous: jump to the previous subtitle sentence.
• ↔ Sentence mode: play only the current subtitle sentence and stop near its end.
• ✦ AI: ask your selected AI provider to explain the current sentence. Tap again to stop a request or regenerate an answer.
• ▶ / ❚❚ Play: play or pause the video.
• CC: show or hide subtitles. The P / T / P+T button switches primary, translation, or bilingual subtitles when both tracks are available.
• ↻ Repeat: replay the current sentence.
• ⏭ Next: jump to the next subtitle sentence.
• ⛶ Fullscreen: open the landscape study view.

Tap a sentence in the subtitle list to jump directly to it. The title menu lets you change videos, review collected explanations, delete collection items, or export the collection.

3. AI explanations

Open Settings → AI, choose OpenAI, Gemini, GLM, or a custom OpenAI-compatible service, enter your own API key and model, then tap Test connection. The first explanation for each provider shows exactly what subtitle context will be sent. Keys are encrypted on your device.

4. Speech and settings

• Settings → Display: adjust subtitle sizes and sentence-end timing.
• Settings → Speech: choose subtitle language, an installed Android voice, and speech rate.
• Settings → About: open help and privacy pages, export/import a local backup that never contains API keys, export sanitized local diagnostics, or open Android's app-data screen.

5. Privacy and deletion

AI and YouTube are optional network features. Android cloud backup and device transfer are disabled. Use Settings → About → Export backup when you want a local copy of settings and learning data; Provider API keys are never included and must be entered again after restore. Delete a provider key in AI settings, delete saved items in the title menu, or clear everything through Android Settings → Apps → PicoPhrase → Storage → Clear storage.

简明中文说明

选择本地视频文件夹，或接受 YouTube 提示后粘贴链接，并导入/粘贴 SRT、VTT 字幕。底部按键依次为：上一句、单句模式、AI 解释、播放/暂停、字幕开关、重复本句、下一句。P / T / P+T 用于切换原文、译文和双语字幕；点击字幕列表中的句子可直接跳转。

在 Settings → AI 中选择服务商、填写自己的 API Key 和模型并测试连接；在 Speech 中选择语言、安卓本地语音和语速；在 About 中可以打开说明与隐私页面、导出/导入不含 API Key 的本地备份、导出脱敏诊断，或进入安卓应用数据管理。