01
Just talk, no script
Record a quick take, or import a vlog or talking-head video you've already shot. No script, no waiting until you're "ready".
A Mac app for language learners
Speak first.
Speak first.
Polish it later.
Turn the foreign language you speak into subtitles, a study blog post and word-highlighted subtitle videos. Even if you stumble, SpeakLog transcribes it, puts what you said next to a more natural version, and helps you fix it one sentence at a time.
Transcribes, renders and exports on your Mac · Japanese, English, Chinese, Korean and more
Video · Preview
昨日、友達と新しいカフェに行きました
Yesterday I went to a new café with a friend.
Why SpeakLog
What learners lack most is speaking.
Many people wait until they're ready and can say it right, so they never say it at all. Those who do speak are left with nothing afterwards: no idea what went wrong, and nothing to show for it.
02
Your words stay yours
What you actually said is always kept. AI edits sit in a separate layer next to it, so months later you can see exactly how far you've come.
03
Polished, then published
Your original plus the improved version is a genuine study record. Export it as subtitles, a blog post or a video for the platforms you already use.
How it works
Four steps from a recording to a finished piece.
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Speak
Drag in a voice memo, vlog or talking-head video, or hit record in the app. Your files are never copied.
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Transcribe
On-device speech recognition with per-word timestamps and confidence, split into sentences at pauses. A 6-minute video takes about a second.
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Review
AI flags misheard words and unnatural phrasing, with reasons. Accept, skip or edit each sentence from the keyboard.
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Publish
Export subtitles, a study blog post and a subtitle video — in any order, or just the one you need.
Two subtitle layers
What you said, and how a native speaker would say it — side by side.
- As said only fixes what the machine misheard. Your grammar mistakes stay, so it reflects your real level.
- Natural rewrites awkward phrasing the way a native speaker would, with a category and reason for every change.
- Explanations are written in your own language, and the depth adapts to your level (CEFR, JLPT, HSK, TOPIK…).
- Read the improved script from a teleprompter and re-record; subtitles align automatically.
As said
昨日は友達と新しいカフェを行きました。
Natural
昨日、友達と新しいカフェに行きました。
ParticleA destination takes に or へ; を marks a place you pass through or leave.
As said
ケーキがすごいおいしいでした。
Natural
ケーキがすごくおいしかったです。
ConjugationThe past of an i-adjective is 〜かった, not 〜でした. Use すごく to modify an adjective.
What you make
Speak once, get three things ready to post.
SpeakLog only exports — there's no SpeakLog social network. Where your work goes is up to you.
Subtitles
Timed, reviewed subtitles. Keep your original words or use the improved version, and add a translation for bilingual captions.
- SRT / VTT / ASS
- ASS keeps part-of-speech colors and keywords
- Or burn them straight into the video
CapCut · Aegisub · Final Cut · YouTube
Study blog
A study note: your text first, then "what I said → more natural" pairs, grammar points and a vocabulary list. Templates keep a series consistent.
- Markdown / HTML
- Rich text that pastes into note and Medium
- Split into a numbered X thread
note · Medium · X · Obsidian · static blogs
Subtitle video
Karaoke-style word highlighting, part-of-speech colors, readings and translations. Preview and export share one renderer, so what you see is what you get.
- Original video, subtitles only, or a different video
- 16:9 · 9:16 · 1:1
- Trimming, pause tightening, face blurring
YouTube · Instagram · TikTok · Bilibili
More features
Details built for speaking and learning.
Any practice language
English, Japanese, Chinese, Korean, French, Spanish, German… set per project.
Readings per language
Furigana for Japanese, pinyin for Chinese, romanization for Korean and Russian — or just part-of-speech colors.
Topic prompts
Nothing to say? Draw a topic, or let AI suggest a batch matched to your level.
Live captions while recording
Hit record to start; stop and it becomes a project.
AI assistant
Tell it in one sentence how to fix subtitles, rewrite the blog or organize notes. Every change can be undone.
Face blurring
Detects faces on your Mac and lets you pick who to blur. You, the person filming, stay unblurred by default.
Multi-media projects
Import several videos and photos at once; AI writes an overview, rates each clip and analyzes content and visuals.
External agents
A built-in MCP server lets Claude Code or Codex read and edit projects and export videos.
Privacy, on your Mac
Your voice and footage stay on your Mac.
Transcription, video rendering, face blurring and export all run locally. Imported files are referenced in place — never copied or uploaded. AI only suggests; you decide. Every AI call is logged with the model, token count and an estimated cost.
Claude Code CLIUses your signed-in claude; choose Sonnet, Opus or Haiku
Codex CLIUses your signed-in codex
Anthropic APIYour API key is stored in the macOS Keychain
On-device modelFully offline and free; good enough for translation and annotation
FAQ
Questions you might have
Which languages does SpeakLog support?
You choose the language you practice: English, Japanese, Chinese, Korean, French, Spanish, German and more, set per project. Explanations, grammar notes and translations are written in a language you understand.
Are my recordings and videos uploaded?
No. Transcription, video rendering, face blurring and export all happen on your Mac, and imported files are not copied. Only when you turn on AI review is the transcript sent to the AI provider you picked; with the on-device model everything stays offline.
Will the AI overwrite what I actually said?
No. Your original words are saved the moment you record them. AI suggestions live in a separate natural layer, each with a reason, and you decide whether to accept or skip them.
What do I need to run it?
A Mac running macOS 26 or later.
Where can I publish what I make?
Subtitles export as SRT, VTT or ASS for CapCut, Aegisub or Final Cut. Blog posts export as Markdown or HTML, copy as rich text into note or Medium, or split into an X thread. Videos export as MP4 in 16:9, 9:16 or 1:1 for YouTube, Instagram, TikTok and more.
Say something today.
SpeakLog for Mac is coming soon. It doesn't have to be good — speak first, polish it later.
Coming soon for MacRequires macOS 26 or later