Phrasal verbs that sink in.
Instead of learning phrasal verbs as isolated translations, Sink In shows the pattern behind them. Pick a particle like out, see the meanings it carries, then practise verbs and sentences that use the same idea until the pattern sticks.
iPhone
Pick a particle 
See the pattern 
Meanings, by particle 
Search any verb 
Anchor every meaning 
Practice today 
Cloze in context 
Train discrimination
Three ideas, one small daily session
Sink In is built on what cognitive science says actually works: spacing, retrieval practice, and desirable difficulty, wrapped in an interface that gets out of your way.
Particle-first
Verbs are grouped by particle (up, in, away, off, out, over, on, back…). Each particle has a recurring shape. Once it clicks, dozens of verbs fall into place.
Spaced repetition (SM-2)
Each meaning is scheduled to come back just as you're about to forget. No deck management, no add-ons. Just review what's due.
Four exercise modes
Recognition cards, particle cloze in context, meaning → particle, and schema match. Interleaved so you train recall and discrimination, not just recognition.
A handful of particles, hundreds of verbs
Each particle carries a small set of recurring meanings. Sink In anchors every meaning to a short motion mnemonic and a bridge sentence so the particle's shape stays visible.
completion · increase · upward motion
removal · making visible · finishing
departure · separation · cancellation
entry · inclusion · involvement
continuation · contact · activation
review · transfer · repetition
reduction · stopping · permanence
return · response · resistance
Frequently asked questions
Start on iOS or Android
Sink In is live on the App Store and Google Play.