Which state lets you find a pair in one pass?
AA map of values already seen
BA fully sorted copy of the input
Ten CardsA reasoning-first coding interview coach
Ten cards a day. Stronger interview instincts.
Learn the patterns behind 150 essential coding interview problems with focused daily practice, spaced repetition, and guided reasoning.
Built for iPhone and iPad · Requires iOS 17+
Today's ten12 day streak
7of 10 complete
150essential problem anchors
72reusable techniques
10focused cards a day
Built for recall under pressure
Move past memorized solutions.
Ten Cards turns a large interview roadmap into a compact practice loop you can explain, transfer, and trust.
Recognize the pattern
Build the signal library that tells you which technique fits before you start typing.
Explain why it works
Practice the state, invariant, transition, complexity, and failure cases interviewers probe.
Review at the right time
Use focused daily sessions and spaced repetition to revisit weak areas before they fade.
A complete daily loop
Know what to practice next.
Follow the Core 150 roadmap, focus sessions on weak areas, and see the reasoning behind each answer before moving on.
- Daily, topic, company, and custom review sessions
- Technique lessons and exact-problem bridge lessons
- Progress, streaks, saved cards, and interview-readiness tracking
64%
96 anchors practiced
Graph traversal8 due
Interval proofs5 due
Tree invariants3 due
Beta access
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