AlgoCards vs Vikha

Master coding interviews with 390 problems, company-specific prep lists, and spaced repetition — completely free. The only app with dedicated trading firm and quant interview prep. Practice the exact problems asked at Google, Meta, Amazon, Citadel, Jane Street, Two Sigma, Goldman Sachs, and 20+ more companies. WHAT'S INSIDE: - 390 curated problems with detailed Python solutions - Company-specific problem lists for 30+ companies - SM-2 spaced repetition for optimal review scheduling - Flashcard mode for on-the-go review - Algorithm pattern cheat sheets with code templates - Weakness detection that adapts to your performance COMPANY-SPECIFIC PREP: Filter problems by company and see what they actually ask. Coverage includes: Trading Firms: Citadel, Citadel Securities, Jane Street, Two Sigma, Jump Trading, Hudson River Trading, IMC, DE Shaw, SIG, Virtu, Point72, Millennium FAANG & Big Tech: Google, Meta, Amazon, Apple, Microsoft, Netflix, Uber, Airbnb, LinkedIn, Stripe, TikTok, Databricks, Nvidia, OpenAI, Palantir, and more ALGORITHM PATTERNS: - Arrays & Hashing - Two Pointers & Sliding Window - Binary Search - Stack & Queue - Linked Lists - Trees & Tries - Graphs & BFS/DFS - Dynamic Programming - Greedy - Heaps & Priority Queues - Backtracking SMART REVIEW SYSTEM: 1. Study problems in flashcard or detail mode 2. Rate your confidence after each problem 3. AlgoCards schedules your next review at the scientifically optimal interval 4. Weakness detection identifies your weak patterns and prioritizes them 5. Build lasting pattern recognition, not temporary memorization WHO IT'S FOR: - Software engineers prepping for FAANG and Big Tech - Quant developers targeting trading firms - CS students preparing for internship interviews - Career switchers learning algorithms and data structures 100% FREE. No paywall. No ads. No subscriptions. Every problem, every solution, every feature. Download AlgoCards and prep smarter.

Vikha – Certification Progress Tracker Vikha (Віха) is Ukrainian for "milestone". The road through certs is long – Vikha is here to mark every step. Your certification journey, organized. Vikha keeps track of every Kubernetes, cloud, and Linux certification you're chasing – from your first KCNA to a full Golden Kubestronaut run. Log voucher purchases, schedule attempts, record passes and failures, and watch your progress (and your spend) across every path you care about. WHAT YOU CAN TRACK • Paths for Kubestronaut, Golden Kubestronaut, AWS, Google Cloud, and Red Hat – out of the box • Every exam in each path: KCNA, KCSA, CKA, CKAD, CKS, LFCS, AWS SAA/SOA/DVA/SAP, GCP PCA/PDE/PCD, RHCSA/RHCE and more • The full state of each attempt: not started, studying, voucher purchased, scheduled, passed, failed, no-show, renewed VOUCHERS AND BUNDLES • Log voucher prices for standalone exams • Bundle support for multi-exam purchases like the Kubestronaut bundle – Vikha allocates the cost per exam automatically • See total spend, cost per earned certification, and breakdowns by provider PATH HEALTH • For credentials that require every exam to stay valid (Kubestronaut, Golden Kubestronaut), see at-a-glance whether the path is healthy, at-risk, or lapsed • Get warned about the soonest expiring certification before it slips • Track renewal dates separately from original passes INSIGHTS • Pass rate, average score, average prep time • Monthly activity heatmap so you can see your study cadence • Cumulative spend over time and per provider • Velocity projections – at your current pace, how long until you finish each path? • Personal records: highest score, fastest prep, longest streak, biggest purchase HOME SCREEN WIDGETS • Small, medium, and large widgets that rotate through your active paths • See your progress, your next exam, and the next upcoming expiration without opening the app