Building a German Vocabulary System That Actually Sticks (Spaced Repetition)

Almost everyone learning German eventually hits the same wall: you look a word up, use it once, and three days later it's gone. You are not bad at languages. You are fighting the way memory works. New words fade on a predictable curve, and the fix is not to study harder but to review each word at the exact moment you're about to forget it. That's the whole idea behind spaced repetition, and it's the single most efficient way to move a few thousand German words from "I've seen that" into "I know that."

This post is not a pep talk about flashcards. It's a concrete setup: which tool, how to build cards that actually work, how many to add a day, and how to feed the system with real German instead of a dead word list. Get the setup right once and twenty focused minutes a day will carry you from a few hundred words to the roughly 3,000 to 4,000 that cover the vast majority of everyday German.

What spaced repetition actually does

A spaced repetition system (SRS) tracks every word you're learning and schedules its next review based on how well you knew it last time. Get a word right easily and it won't show up again for weeks, then months. Miss it and it comes back tomorrow. The intervals stretch out as the memory solidifies, so you spend almost no time on words you already own and almost all your time on the handful that are slipping. That's why it beats re-reading a vocabulary list, where you burn equal effort on und and on Verschwörungstheorie.

The classic tool for this is Anki, and it's worth being specific about the cost because it trips people up. Anki is genuinely free on Windows, macOS, and Linux (the desktop app), and free on Android through the community-built AnkiDroid. The one place you pay is iPhone and iPad: AnkiMobile costs a one-time $24.99 in the US App Store (around €29.99 in Germany), and that single purchase funds most of Anki's development. There's no subscription and no paywalled features. Your cards sync across all your devices for free through an AnkiWeb account.

Anki

The reference spaced-repetition app. Free on desktop and Android, a one-time $24.99 on iOS. Fully customizable cards, free cross-device sync, and a huge library of shared decks. It's ugly and the learning curve is real, but nothing else gives you this much control over how your German vocabulary is scheduled.

If Anki's blank-slate flexibility feels like too much at the start, a cloze-sentence tool like Clozemaster or a course app with built-in review like Memrise will get you going faster with pre-made German content. You give up fine control over your cards, but you skip the setup. For most people the right move is to start with a good shared Anki deck and only graduate to building your own once the habit sticks.

Turn on FSRS before you do anything else

Here's a setting almost no beginner knows about, and it quietly doubles the value of your reviews. Anki's default scheduler is an old algorithm called SM-2. Newer versions ship with FSRS (the Free Spaced Repetition Scheduler), a much smarter algorithm that models your personal forgetting curve from your actual review history. It's an alternative to SM-2, and it is still opt-in: you enable it under the FSRS section at the bottom of a deck's options.

The mistake that makes flashcards fail: single-word cards

The most common way people wreck their own vocabulary deck is putting a bare English word on the front and a bare German word on the back. Table → der Tisch. It feels like studying. It teaches you almost nothing usable, for three reasons.

First, you learn to recognize the word, not produce it, and you learn it stranded from any context. Second, German words rarely map one-to-one onto English ones. Nur is "only," except when it's "just," except when it's a softener that barely translates. A single-word card flattens all of that. Third, and most important for German, a noun without its article is half-learned. As covered in how to learn German noun genders, gender drives every case ending downstream, so a card that doesn't drill der/die/das is teaching you a word you'll still get wrong in a sentence.

The fix is to make sentence cards and, even better, cloze cards.

Build cloze cards from real sentences

A cloze card shows you a full sentence with one word blanked out, and you recall the missing word. Instead of table → der Tisch, the card is:

Der ___ ist aus Holz. (The table is made of wood.)

with Tisch as the answer. Anki has a built-in Cloze card type that makes this trivial: you type the whole sentence, wrap the target in {{c1::Tisch}}, and it generates the card for you. This one change fixes most of what's wrong with beginner decks:

• You learn the word in context, so you absorb which prepositions and cases it takes, not just its dictionary meaning.
• You get comprehensible input on every review instead of a naked word pair, which reinforces grammar and word order for free.
• For a noun, put the article in the blank too ({{c1::Der}} at the front, or blank the article separately) so you're forced to recall the gender.

Add audio and, ideally, a picture to your cards where you can. German pronunciation carries information English spelling doesn't (final devoicing, the ü/ö vowels, word stress), and hearing the word on every review builds the listening side of your memory at the same time. Anki's AwesomeTTS add-on or a pasted audio clip from Forvo handles this. A picture on vocabulary you can visualize lets you skip English entirely and bind the German word straight to the concept.

Mine your cards from real German, not a frequency list

A pre-made "top 4,000 German words" deck is a fine way to start, and for your first few months it's the fastest path: you cover the highest-value words in rough frequency order without having to build anything. Search AnkiWeb's shared decks for a well-rated German frequency deck and start there.

But the words that actually stick are the ones you meet in something you cared about reading or hearing. This is called sentence mining, and it's the habit that turns Anki from a chore into a flywheel. When you read a news article on Deutsche Welle's slow-news page, watch a German YouTube video, or get stuck on a word in a message from a friend, grab that exact sentence, blank the new word, and drop it into your deck. Now every review is a rerun of a moment you were genuinely trying to understand something. Words learned this way come pre-loaded with context and personal hooks, which is exactly what memory holds onto.

The workflow that keeps this sustainable: keep a running note on your phone during the day, dump any word or sentence you tripped on into it, and spend five minutes each evening turning the good ones into cloze cards. Don't mine everything. If a word looks rare or you can't imagine using it, skip it. The point is a small, high-signal deck, not a museum of every word you've ever met.

How many new cards a day, and how to not burn out

Set new cards to 10 to 20 a day and hold that line. This is the number people get wrong in both directions. Add 100 new cards in a burst of motivation and in a week your daily reviews balloon into the hundreds, the session becomes miserable, and you quit. Add zero and you never build the base. Ten to twenty new words a day is around 300 to 500 a month, and it keeps the daily review load in the fifteen-to-twenty-five-minute range that you can actually sustain for a year.

Do your reviews when they fit your day, not in one block. The reason SRS works on a phone is that it turns dead time into study time. A queue on the train, waiting for coffee, five minutes before bed. Because the algorithm only shows you what's actually due, those scraps add up to real coverage without ever feeling like a study session.

Vocabulary is not the whole job

One honest caveat, because it's where people misuse this system. A big Anki deck makes you good at recognizing words. It does not, on its own, make you fluent, and it won't teach you to hold a conversation. Recall in isolation and production under time pressure are different skills. Words you've drilled in Anki only become usable once you meet them again in real input and output, which is why sentence mining and actual reading and listening matter so much. Treat the deck as the memory backbone that makes everything else stick faster, not as the main event. Pair it with real input (see how to improve your German listening comprehension) and with speaking practice, and the vocabulary you've banked suddenly has somewhere to go.

Set it up once, the right way: FSRS on, cloze cards over single words, 15 new a day, reviews every day, cards mined from German you actually touched. Do that and the wall where words evaporate three days later simply stops being a problem. The words you meet, you keep.