You pick up a language—almost by osmosis.
Osmolog tracks supported videos automatically and keeps your reading, games and study sessions in one dashboard. See where your language-learning time goes.
Works on YouTube, Netflix, Twitch and Crunchyroll. Free. No account required. Local by default. No ads.
Active and passive minutes, last 30 days
Click a line or a label to isolate it.
Built by a language learner and gamer. Number go up, brain happy. That's where it started.
Some activities follow playback automatically. Others need a connection or a timer you start yourself.
Count supported, audible playback, with focused viewing and background listening shown separately. Pausing or muting stops counting.
Check the language in the overlay. Player language information takes priority; if it is unclear, choose the language yourself. Translated captions are not proof of the spoken language.
Add an HTML-video website, grant permission for that site and choose its language. Some embedded players need permission for their own host too.
Compatibility varies. The extension labels other adapters Beta or Experimental. Prime Video currently needs the manual timer.
Start a timer or add a past session for reading, gaming, speaking, writing, vocabulary, watching or listening. Console games, lessons and mobile activities belong here too.
For supported article websites, enable the site and press the reading control. Reading never starts automatically and pauses when the page loses focus.
Bring Anki review statistics into your dashboard, or track local MPV and Manatan video with the Windows Companion.
Anki must be open; this does not track Anki mobile apps automatically. The separate Windows Companion connects MPV/mpv.net and native Manatan video playback. It requires Windows 10/11 x64, pairing and player setup.
Opt in to Steam tracking and set each game's language. The Companion tracks running games with focus and idle checks, and lets you pause or exclude a game.
It cannot reliably detect every in-game pause menu. Steam Deck, console games and historical Steam playtime imports are not covered.
Start a manual watching timer or enter a completed session on your phone, then collect it in the extension later. Your computer can be off.
Requires internet and the same confirmed Osmolog account. It does not monitor other apps on your phone.
Desktop Chrome and Edge. Features marked 2.2.0 preview belong to the next extension update; check your installed version. Music and podcast adapters have their own Beta or Experimental labels in Site rules.
I watch in Japanese, English and Swedish, sometimes in the same evening. Every tracker I tried wanted me to choose a language and start a stopwatch first. I know myself too well. I was never going to keep that up.
So I built the tracker I wanted: it starts and stops itself, works out which language is playing, and separates the time I am watching from the time something is merely playing while I cook. Then it shows me where those hours actually went.
It was only meant to be for me. It grew into a polished one-person project, so I decided to share it for free.
— Melis
YouTube, Netflix, Twitch or Crunchyroll. Just press play. Osmolog is already running in the background.
From the audio track, the captions and the player data. If it can't tell, it asks you instead of guessing, and remembers your answer for that channel or series, so it's not asking again every time you open your favourite creator.
Review time by language, source and activity, split into active and passive. If a language was detected incorrectly, correct it in the overlay or history.
YouTube, Netflix, Twitch and Crunchyroll, on both live streams and VODs where available. Playback starts the timer; muting or pausing stops it. Twitch is here because it's where I actually watch: Japanese streamers playing games I already play is the easiest immersion I've found. Anything else stays labelled Beta or Experimental in the extension until I've checked it against that site's current player, because there's no point counting time I can't count correctly.
Automatic mode uses the player's language information and your remembered choices. Unclear videos ask for a language; custom sites and manual activities need a choice too. Each session stays assigned to its language, so one install can cover the different languages you study.
Focused foreground viewing counts as active. Eligible audible playback in the background counts as passive. These describe browser focus, not a measurement of your concentration. See the total with active and passive time kept visible as separate parts.
Time of day, day of week, session length, streaks, a year heatmap and a weekly recap. This is the part I actually use: whether my evenings are focused or just background noise, and which day of the week quietly does the work.
Music plays through a video element, so the extension can see it and does count it: active if the tab is in front, passive if it's behind. I've deliberately not folded it in with everything else. Eight hours of background music is not eight hours of immersion, and a number that says otherwise is worse than no number. So it sits in its own source category where you can see it, judge it, and turn it off if you'd rather it didn't count. If you have a strong view on how this should work, tell me. I'm genuinely undecided.
A persistent timer and backdated entries cover reading, gaming, tutoring, speaking, writing and other study. Manual time counts towards your own totals. Private groups can choose whether manual entries count in their comparisons.
Without Pro full backup, detailed history stays in your browser. Local tracking needs no account, and Osmolog never sends URLs, subtitles, searches or page text to its own services.
After you review the disclosure and sign in, Osmolog can store your complete tracker history and settings in your private account backup for recovery. That includes session titles and timing, but excludes URLs, searches, subtitles, page text and artwork URLs.
There's a switch in Settings → Privacy & data marked Send anonymous usage data. It's off until you turn it on. It sends language, general platform, active/passive duration, broad activity type, date and extension version, without titles, URLs, searches, subtitles or manual notes. Optional error reporting has separate consent. See the privacy policy for the exact data each feature uses.
osmolog.com counts page views through Cloudflare Web Analytics: which page, roughly which country, and where the visit came from. No cookies, no following you around the web. It's completely separate from the extension and can't see anything inside it. It exists so I can tell whether anyone found the site at all.
No advertising SDK, no data broker, no sale. There's nobody to sell it to and I'm not going to build that.
Export a JSON backup for restoring detailed history, or a CSV of your totals. Basic Chrome Sync carries totals and recent daily aggregates, not a complete session archive. Keep a JSON backup before uninstalling or clearing browser data.
An optional way to compare momentum with a friend or a small group. Members would see each other's totals and nothing else: never titles, never URLs, never what anyone watched. It's still being built.
The next update includes a comparison view for the languages you track, alongside the individual language dashboards. See how your time is divided without combining every language into one goal.
Each service has its own player handling and can change. Supported, Beta and Experimental labels show the current level of support. A service name in the manual timer is just a label; it does not imply automatic integration.
Local tracking, statistics and JSON backups are free and do not need an account. Basic Chrome Sync carries totals. Optional full-history account backup and group features have their own availability and account requirements; the extension explains those before you enable them.
Yes. Supported audio players are tracked automatically. For reading, enable only the article sites you choose and press the in-page reading control; tutoring and speaking use the manual timer. Reading never starts on its own.
No. One install can track multiple languages. Automatic mode identifies supported videos when it has enough information; check the overlay and choose or correct the language when needed.
Start your next video. Check the language and timer, then see where your time goes.
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