Free desktop app · Open sourceFree and open source · bring your own key
LearnAnything.Finish it.
BiliMind is a free, open-source study app on your own computer, with your own AI key. Drop in your slides or SOP, type one sentence — get a real course: lessons in the right order, practice checked against your files, a study plan.
Free · no account · no key neededFree and open source · your own AI key, 2 to 9 cents a course
Lesson-by-lesson formatsPractice that checks your workA plan that bends
Not a chat
A real course, not a chat.
An ordered path of lessons — each in the format that teaches it best.
The intro film
See a course get built.
1:12 min
Taught your way
19 lesson formats. Your own files.
ExplainersSpeaking drillsRole-playCode
For example: espresso at home, Spanish for June, SQL for analysts, anatomy in six weeks, public speaking, beekeeping, balance sheets, Postgres performance, watercolour washes, sourdough science.
How it works
One sentence in. A whole course out.
Keep scrolling — this is how a course is made. The field types a sentence, level, aim and time get read, the roadmap draws itself, and then we open one lesson so you can see what is inside.
EM
New course/What do you want to learn?0 of 15 lessons writtenWrite lessonsShareAa
RoadmapOrdering politely
Step 1 of 3 · Your goal
What do you want to learn?
Say it the way you would to a teacher — the subject, and what you want to be able to do. BiliMind plans the whole course for you.
What do you want to learn?
Or start from one of these
Postgres query performanceKalman filters, worked examplesUzbek for a two-week tripReading a balance sheet
Language, level and paceEnglish
Ground it in your own materialSlides, PDFs, notes, links — optional, but it changes everything
Step 2 of 3 · About you
What your sentence says, before the map
0/3
1
How much Italian do you have?
None yetA few wordsI can get by
2
What is it for?
The tripAn examReading novels
3
Time each week?
1 hour3 hours5+ hours
Plan my courseThe Lead picks which lessons get written.
Step 2 · 18 min · then “Present tense: the regulars”
Ordering politely: vorrei, not voglio
1/6ExplanationEditMark complete
At the bar, Italians don’t say “I want”. They say vorrei — “I would like” — and it gets you a smile instead of a raised eyebrow. One word, and the whole morning goes differently.
ComparisonTwo words people mix up
When you order, these axes matter:
Tone
At the bar
Best for
Voglio
Blunt — “I want”
Voglio un caffè.
Plans: voglio vedere Roma
Vorrei
Polite — “I’d like”
Vorrei un caffè.
Asking anyone for anything
IllustrationAl bar
il cornettothe croissantla tazzinathe espresso cupla macchinathe machine
The labels are real text — in your language, never baked into the picture.
Role-playAt a bar in Rome
Goal: order breakfast, politely
BaristaBuongiorno! Cosa prende?Good morning! What will you have?
Vorrei un caffè e un cornetto, per favore.I’d like a coffee and a croissant, please.
BaristaCerto. Al banco o al tavolo?Of course. At the counter or a table?
Al banco, grazie.At the counter, thanks.
BaristaEcco a lei. Due euro e venti.Here you are. Two euros twenty.
Goal reached — nicely done. You can keep chatting or move on.
Speaking drillSay it
Vorrei un caffè e un cornetto, per favore.
I’d like a coffee and a croissant, please.
/vor·REI un caf·FÈ e un cor·NET·to/
Speak
72%heard: “vorrei un caffè e un coretto per favore”
Vorreiuncaffèeuncornetto,perfavore.
“Cornetto” came out as “coretto”. Lean on the rn, then the double t.
1Multiple choiceChecked instantly
Which one do you say to the barista?
AVoglio un cappuccino.
BVorrei un cappuccino.
CDammi un cappuccino.
SubmitAnswer to enable submission.
Right. Vorrei is the conditional — “I would like”. Voglio isn’t wrong, just blunt: a child at the counter.
Done with this lesson?1 of 2 checks passed.
Mark complete
Comes next
Present tense: the regulars
StudyMapPlanFilesAsk
Italian by June
Say it the way you’d say it to a friend. The field grows to fit.No questions — level, aim and time, read from your one sentence.It plans the course: topics in order, with what hangs off each one.Every lesson is written in the formats its knowledge needs.Then it keeps you going: a study plan, flashcards, checks from memory.
1Say it2Your goal3The roadmap4A lesson5Finish it
Taught the way it’s learned
19 formats. One that fits.
Narration, speaking drills and role-play need a voice service, so they are on bilimind.com, with sync, mobile and classes.
BiliMind first decides what kind of knowledge a lesson holds, then teaches it the way that kind is learned. A procedure gets steps, a mix-up gets a side-by-side, a phrase gets said out loud.
27lesson formats, every one a real block
Drag them · click oneTap one
Checked, not just shown
Practice that checks your work.
A chat tells you “great answer!” every time. Here a written answer is marked against a rubric written first, code runs against real tests, and an answer it can’t mark says so instead of guessing.
9question types, all graded
4live code runtimes
01You write · rubric grading
A rubric marks it, line by line.
7/8Check yourselfMark complete
Check yourself
2Short answerMarked by AI1 attempt
Your shot tastes sharp and sour. What went wrong, and what would you change?
Sour means the water rushed through before the sweetness dissolved. More contact fixes it: grind finer. Bitter is the opposite — go coarser.
24 words
Submit
Passed
80 / 100 · pass mark 70
80%
You tied the sourness to the water leaving too soon and named the right lever. You didn’t say why a finer grind slows it down.
Rubric
Explains the cause· weight 0.590%
Proposes a specific fix· weight 0.570%
Try a different answer
02You code · it runs it
It runs your code. The tests decide.
5/8ExerciseMark complete
Exercise3 checksPYTHON
total() must refuse a negative price. Make all three cases pass.
PYWrite the functionpython · sandbox · 5sready
1deftotal(prices):2"""Sum a cart."""3ifany(p <0for p in prices):4raiseValueError("negative")5returnsum(prices)
CasesConsole
returns the right totalinput [3, 1, 5] → 9
handles an empty cartinput [] → 0
rejects a negative priceinput [3, -1, 5] → ValueError
Run again3/3 passing · 38ms⌘↵ to run
03You talk · it talks back
It hears you, and coaches the slip.
4/7Say itMark complete
Say it
At the ticket desk in Madrid. Say each one out loud.
¿Dónde está la estación de tren?
Where is the train station?
/ˈdon.de esˈta la es.taˈθjon de tren/
Speak
100%heard: “dónde está la estación de tren”
¿Dóndeestálaestacióndetren?
That’s the one: es-TÁ, “is”. Next phrase.
Un billete para Toledo, por favor.
A ticket to Toledo, please.
Speak
For the four months after the excitement
A plan that bends.
Life happens. Miss three days and the plan just… slides — no red, no backlog, no guilt. And review lands right before you’d forget, so what you learned in week one is still there in week four.
01The plan
Miss three days? It slides.
Italian by June3 hrs a weekToday is Fri 1 May
Italian by June /PlanLessonsPlanFiles
Your plan
This week0h 14m/3h
Sessions1/15
3 sessions slipped — no problem.Your plan shifted 3 days so you keep 3 hrs a week. Nothing was dropped.
Mon27Sounds and greetingsDone · 14 min
Tue28The rolled R10 min
Wed29Ordering politely: vorrei, not voglio18 min
Thu30Present tense: the regulars16 min
Sat2Flashcard drill8 min
Mon4Asking the way15 min
Tue5Tu or Lei?9 min
02Spaced review
Back right before you’d forget it.
2 lessons to review todayA quick pass to keep earlier lessons from slipping. About 6 min.
Start
2 of 2waited 1 day
Italian by June
Ordering politely: vorrei, not voglio
Vorrei softens the ask — “I would like”. Voglio is the blunt “I want” a child says at the counter.
Open the lesson
How well did you remember this?
AgainBlanked on itHardCame back slowlyGoodRemembered itEasyKnew it cold
1 of 26 days since you learned it
Italian by June
Sounds and greetings
Ciao for friends, buongiorno for the barista — and the five vowels that never change their sound.
Open the lesson
How well did you remember this?
AgainBlanked on itHardCame back slowlyGoodRemembered itEasyKnew it cold
All caught upYou brought back 2 lessons. That’s the part that makes it last.4 days in a row
Your own material
Drop anything in.
It actually teaches from it. A semester of slides, last year’s paper, the shop’s SOP, a folder of notes — BiliMind pulls them apart and weaves the passages that matter into your lessons. You study the syllabus you’ll be examined on, not a generic internet average.
When you build from a folder, every auto-marked answer is checked against your files. Made-up citations don’t exist here.
Notes, slides and links
Your files
Add your own notes and BiliMind will teach from them, quoting them back to you.
Drop it here, or click to browse
PDF, Word (.docx), PowerPoint (.pptx), text, Markdown and HTML web pages.
…or paste a link, or type a noteAdd note
1file1The five variables
1file2Sour, sweet & bitter
1file3Beans and freshness
1file4Grind size as the lever
1file5A level, clump-free bed
1file6Brew ratio: dose & yield
What’s in the box
Six numbers. No adjectives.
The breadth, stated once. Every format, voice and cost cap below is in the product today — the first one is counted straight from the engine code.
01
27 lesson formats
From speaking drills to code the tests mark.
02
11 kinds of knowledge
Each lesson is sorted first, then taught to fit.
03
9 question types, all graded
Your 3,5 counts the same as 3.5.
04
4 live code runtimes
Write it in the browser. The tests decide.
05
2 AI providers
DeepSeek and OpenRouter, on your own key.
06
1 dollar a course
At most, by default. One measured run: 4 cents.
Desktop · CLI · Browser
Wherever you are.
Same engine, every door. The desktop app or the command line — and the command line saves a course as one HTML file that plays in any browser. No account at all.
Any browserOn your phoneFrom the command line
bilimind.com/you/espresso-at-home
DL
Dialling in espresso at home /Recognising sour, sweet & bitter12 of 62 lessons writtenShareAa
CourseMap
LessonsPlanFiles
Extraction fundamentals
1The five variables that make espresso4
2Recognising sour, sweet & bitter35m
Tasting side by side
The sweet window
3Choosing beans and freshness3
4Grind size as the lever4
Puck preparation
5A level, clump-free bed3
6Brew ratio: dose & yield4
RoadmapRecognising sour, sweet…
Step 2 · 35 min · then “Choosing beans and freshness”
Recognising sour, sweet, and bitter in a shot
2/7ComparisonEditMark complete
Sour and bitter both taste “off”, but they sit on opposite sides of the sweet window — and the fix for one is the opposite of the fix for the other.
Dominant tasteMouthfeelGrind move
SourSharp, lemony, thinThin, wateryFiner
BalancedSweet, syrupy, cleanCoating, fullKeep
BitterAsh, harsh roastDryingCoarser
Listening Narrated · Edge voices
Your course, in any browser
9:41
Today
DL
Learn something newPlanned in minutes
What do you want to learn?
Drop filesPaste notes
Pick up where you left off
Recognising sour, sweet & bitter
Dialling in espresso at home
Resume35 min
Your plan
1Recognising sour, sweet & bitter35 min · planned for today
2Choosing beans and freshness30 min · planned for Thu
TodayCoursesFilesNew
Opens on your phone, too
9:41
BiliMindbot
Today
What’s on today?
Morning! Today’s lesson is ready.
Recognising sour, sweet & bitterStep 2 of 11 · 35 min
Open lesson
Message
BiliMind
Dialling in espr…Aa
No sign-in — the course is one file
Step 2 · 35 min
Recognising sour, sweet, and bitter in a shot
2/7ComparisonMark complete
SourFiner
BalancedKeep
BitterCoarser
StudyMapPlanFilesAsk
From the command line
Taught in
Written and taught in the language you ask for — not translated into it.
For students, shops & tutors
One owner builds it. The whole crew follows.
No accounts and no seats: a course is one HTML file. Put it online, like our boba-shop demo, and every new hire opens one link.
BiliMind free has a rate limit; when it is busy the app says so. Costs are in USD, AI only, from the real runs in our README.
BiliMind free, the key-less AI we paid for, is paused for now, so the app runs on your key. Costs are in USD, AI only, from the real runs in our README.
Questions
Fair questions.
The six we hear most. The intro film answers most of them in about a minute.
Free · no account · no keyFree and open source · bring your own key
Learn anything.Finish it.
What do you want to learn?
19 lesson formats · Linux tested; Windows and macOS builds untested; command line
