Web apps, content, and coding projects
Draft polished emails instantly using Gemini AI.
🔑 Requires your own free Gemini API key
Try ItSearch strategy + outreach writer + JD analyzer for CS students hunting internships.
LaunchEvaluate, improve, and learn prompt techniques — score bars, side-by-side rewrites, and a techniques library.
LaunchTest prompts live with temperature + token controls, prompt history, and starter templates.
LaunchBrainstorm AI project ideas by category & difficulty using Gemini.
Live DemoPaste any API error and get a plain-English fix with code in seconds.
Live DemoGet senior developer feedback on your code — score, issues, and a fixed version.
Live DemoFree, no sign-up. Auto-detects language, animates execution step by step, and links YouTube + Stack Overflow to study the concept.
Live DemoDescribe your changes and get 3 perfect conventional commit messages, a full PR description, a changelog, and branch name suggestions — instantly.
Live DemoGenerate a professional GitHub README with badges and live preview in seconds.
Live Demo4-tab doc tool: Docstring Generator (Google / NumPy / JSDoc formats), README Generator, Whiteboard Mode with Big-O analysis, and 🔍 PR Explainer — paste code changes and get a reviewer-friendly PR description.
Live DemoUnderstand any algorithm with analogies, visual traces, Big O, and a quiz.
Live DemoExplain any CS concept in plain English — analogies, code demos, prerequisite map, FAANG interview angle with sample questions, and Comparison Mode for side-by-side concept breakdowns.
Live DemoPaste your notes and get a full interactive quiz — MCQ, true/false, or short answer.
LaunchEnter your exam date and get a color-coded day-by-day study calendar — plus a full FAANG Prep Mode with 12-week structured schedule, daily hours by skill level, LeetCode targets, system design topics, and company-specific notes for Google / Meta / Amazon / Apple / Netflix.
LaunchStep-by-step homework help that teaches you how to think, not just the answer.
Launch6 unique research topics with thesis, arguments, and a full outline — instantly.
LaunchThe best study technique — answer from memory, rate yourself, drill weak spots.
LaunchBreathing exercises, thought reframing, and a personalized pep talk before exams.
LaunchSimulate real tech interviews with per-answer AI feedback and a final grade.
LaunchPersonalized, human-sounding cover letters with JD keyword matching.
LaunchPractice HR interviews in a real chat format and get scored coaching feedback.
LaunchTurn weak resume bullets into strong, metric-driven, ATS-friendly statements.
LaunchThree-tab recruiter toolkit — Cold Email Writer (personalized under-150-word emails), Follow-Up Sequence Generator (Day 7/14/21 emails under 100 words each), and Referral Request Script (LinkedIn DM + email + 3 things NOT to say).
LaunchPaste any JD and get your match score, gaps, keywords, and a "should I apply?" verdict.
LaunchBilingual EN/VI app for everyday situations — grocery, doctor, bank, and more.
LaunchBilingual AI chat partner for Vietnamese beginners — with voice, hints, and corrections.
LaunchInteractive 8-step tutorial to build and deploy your own Gemini chatbot.
LaunchFormat, validate, explore as a tree, and get plain-English explanations of any JSON.
LaunchPick a component, choose your vibe, get beautiful CSS with a live preview instantly.
LaunchAI-generated party game sets on any topic — or polish your own statements.
LaunchAI captions for 20 meme templates with live preview and PNG download.
LaunchA personalized daily challenge to push your comfort zone — track streaks and badges.
LaunchAI pixel art ideas with Canvas previews, color palettes, and a built-in editor.
LaunchDesign beautiful mandalas in real time — describe a mood and AI sets the style.
LaunchRemix any recipe — healthier, fusion, budget-friendly, or American pantry substitutes.
LaunchFascinating historical stories for any date — with a Vietnam connection mode.
LaunchBilingual EN/VI slang guide for Vietnamese teens — with cringe-o-meter ratings.
LaunchDaily American idioms with Vietnamese translations, origin stories, and mini games.
LaunchBilingual EN/VI basketball vocabulary app with flashcards, fill-in-the-blank quiz, word search, and a personal vocab book — for teen players learning English.
LaunchInteractive animated DP table visualizer for FAANG prep — 10 classic problems, step-by-step animations, pattern reference, and quiz-based mastery tracking.
LaunchAnimated call stack explorer for mastering recursion in FAANG interviews — step through Fibonacci, Merge Sort, Hanoi and more with live stack frames and recursion trees.
LaunchInteractive OS learning tool — simulate CPU scheduling (FCFS, SJF, Round Robin, Priority), memory allocation, page replacement, deadlock detection, and disk scheduling with step-by-step visualizations.
LaunchAI scripts and turn-by-turn practice for school conversations — making friends, asking teachers for help, group projects, handling conflict, and more. Pick a situation, set your English level, and get a ready-to-use script.
LaunchAsk about any TikTok trend, meme, TV show, or slang word — Gemini explains it simply with analogies, real-life examples, do's & don'ts, and a fun quiz. Built for ESL learners navigating American culture.
LaunchPaste your writing and get gentle AI grammar corrections with tips — supports beginner, intermediate, and advanced levels. Highlights errors by type, rewrites your text, and tracks your progress over time.
LaunchEnter any school-assigned book and get instant summaries, character breakdowns, themes, key quotes, discussion questions, a report outline, and a passage explainer — 8 popular books pre-loaded.
LaunchTrack every internship and job application — status stages, stats dashboard, and CSV export. No sign-up needed.
LaunchAI-powered compensation negotiation coach for CS students and new grads targeting FAANG offers — offer analyzer, negotiation scripts, offer comparator, TC calculator, and live coaching chat.
LaunchThree-tab LinkedIn toolkit — Message Generator (connection requests, follow-ups, referral asks, 3 variants each), Message Tracker with reply-rate stats and localStorage, and Warm Intro Chain Mapper that visualizes your connection path to a target company and writes ready-to-send hop messages.
LaunchMaster 12 core interview patterns — Sliding Window, Two Pointers, BFS/DFS, DP and more. Each pattern has a code template, hints, and practice problems with approach reveals.
LaunchInteractive binary search coach — 6 pattern variants, step-by-step visualizer, complexity cheat sheet, and 20 practice problems with approach reveals.
LaunchInteractive guide covering GPA, AP classes, extracurriculars, college prep, social life, and time management — with quizzes and checklists for each grade year.
LaunchMaster 8 essay types — learn step-by-step structure and transitions, generate a formatted outline instantly, and practice with 30 prompts tracked by difficulty.
LaunchBuild English reading skills with 12 graded passages (A1–C1), 5 comprehension questions each, vocabulary flashcards, and progress tracking across 4 CEFR levels.
LaunchMaster 200 high-school words across 8 categories (SAT, Literary, Science, History & more) with flip flashcards, 4 quiz modes, and per-category mastery tracking.
LaunchMaster American English sounds with a full IPA phoneme guide, 40 tongue twisters by target sound, 100 commonly mispronounced words with tips, and a 20-question quiz.
LaunchNavigate friendships, dating, drama, peer pressure, and school cliques — with practical guides, 20 interactive scenarios, and 30 confidence-building challenges.
LaunchMaster 120 American idioms across 8 categories — browse literal vs. real meanings, mark idioms as learned, and quiz yourself with 20-question rounds and score tracking.
Launch4-tab planner: manage today's tasks with priority and category, view a weekly grid with per-day progress bars, set weekly/monthly goals with sliders, and track streaks and stats.
LaunchFull-featured Pomodoro timer with a circular SVG ring, task tracking with pomodoro counts, customizable session lengths, auto-start, browser notifications, and daily/weekly stats with a bar chart.
LaunchFast brain-dump with auto-save, #tag system, searchable grid with pin support, and a full English Journal Mode — daily entries with word-count goals (50–300), live progress bar, automatic vocabulary detector for long words, add-word vocab list, past-entry viewer, and weekly summary with streak counter.
LaunchType 150 CS terms as fast as possible — WPM counter, accuracy tracking, streak system with harder terms as you improve, 60-second rounds, personal leaderboard, and missed-term stats.
LaunchPractice 20 system design problems (URL Shortener to Google Docs) with a 5-step interview framework, hints, component checklists, and sample solutions. Browse 30 concepts with tradeoffs and track your progress.
LaunchBuild your own Star Wars fan wiki: AI Story Builder, Fan Wiki generator (exportable HTML), lore guide, trivia, character collection — plus a 🎓 Web Dev tab teaching HTML/CSS/JS concepts and step-by-step GitHub Pages deployment so you can ship your wiki as a real portfolio piece.
Launch30-point checklist across Profile, Repos, Code, and Activity — score your portfolio with an A/B/C/D grade, browse 40 actionable tips across 8 categories, copy-paste README and commit message templates, and track progress over time.
Launch4-7-8 breathing exercise with animated timer, 20 affirmations, confidence check-in slider, 40 interview questions across 4 categories with STAR hints and self-rating, 10 body language tip cards, and a progress dashboard — all saved locally.
Launch100 hardcoded coding questions across Python, JavaScript, Algorithms, Data Structures, OOP, Web Dev, Databases, Git, Linux, and General CS — with a 20s timer, streak bonuses, answer explanations, a personal leaderboard, and topic-level accuracy stats.
Launch12 algorithms animated in real time — Bubble, Merge, Quick, Heap Sort, Binary Search, BFS, DFS, Two Pointers, Sliding Window and more — with color-coded bar charts, step-by-step mode, live stats, complexity reference cards, and 10 built-in challenges.
Launch8 career tracks (Frontend, Backend, DevOps, ML, Security and more) with step-by-step roadmaps from beginner to senior, skill checklists across 10 categories, personal goal tracker with deadlines, and a streak counter — all saved locally.
LaunchGenerate a full landing page copy set — 3 headline variations, subheadline, hero paragraph, feature blurbs, testimonial templates, CTA options, and FAQ — plus 15 pro copywriting frameworks and a 20-headline swipe file across 5 niches.
LaunchDefine exactly what your MVP needs — nothing more. Answer 5 scope questions and get a Lean / Standard / Overscoped verdict, then prioritize features with a MoSCoW board, generate a one-page MVP canvas, and export everything as markdown.
LaunchBuild an investor-ready 10-slide pitch deck with a guided wizard — Company, Problem, Solution, Market, Product, Traction, Business Model, Competition, Team, and The Ask. Preview all slides, copy any slide or the full deck as markdown, and get pro tips for every slide.
LaunchScore your ASO before launch — analyze title, subtitle, and description with live feedback, rank keyword ideas and build the Apple 100-char keyword string, preview your listing in iOS and Google Play styles, and run through a 25-point launch checklist.
LaunchEverything your team needs to run sprints — drag-and-drop Kanban board with story points and blocker flags, sprint planner with burndown tracking, retrospective sticky-note board, and a velocity tracker with 8-sprint chart and forecast. No Jira needed.
LaunchDesign structured A/B tests with a hypothesis builder, calculate required sample size, check statistical significance with p-value approximation, log results per variant, and declare a winner — all saved locally, no spreadsheet juggling.
LaunchPaste any article and get an instant SEO score — keyword density, readability, passive voice, internal links, and more. Build meta titles and descriptions with live character counters, classify keyword intent, validate heading structure, and run through a 30-item pre-publish checklist.
LaunchPick from 12 brand archetypes to auto-fill tone and vocabulary, tune your voice with 5 opposing sliders, build a color palette with WCAG contrast checking, preview 10 curated font pairings live, and export your full brand kit as markdown.
LaunchCommand your entire launch from one screen — 30-item readiness checklist with critical blockers surfaced at the top, live countdown timer, drag-and-drop day-of timeline with owner assignments, 10-channel tracker with status badges, and a post-launch debrief logger.
LaunchNine blocks, one page, total clarity — interactive BMC with sticky note entries per block, 3 pre-filled examples (Airbnb, Spotify, SaaS startup), and print-ready export.
LaunchKnow your rivals better than they know themselves — competitor matrix with heatmap scoring, SWOT boards, draggable 2×2 positioning map, and auto-generated analysis report.
LaunchWrite emails people open — A/B subject line scorer, spam word detector, 3 pre-built email sequences, metrics calculator with industry benchmarks, and 15 plug-and-play templates.
LaunchYou optimize your code, now optimize the body running it — 5 coder-friendly workout splits, desk break timer with 20 micro-routines, PR tracker, and wrist/posture recovery exercises.
Launch25 minutes of deep work, 4 minutes of fire, repeat until shipped — Pomodoro-HIIT hybrid timer with animated SVG ring, Tabata mode, Pure HIIT mode, 10 desk-friendly routines (silent, apartment-safe, pre-interview pump), and session history with streak tracking.
LaunchTrack every rep, catch every plateau, hit every personal record — workout log with auto-PR detection across 40 exercises, 1RM estimates (Epley), trend arrows per lift, plateau detector with fix tips, progress charts, and a 4-week linear progression planner for bench, squat, and deadlift.
LaunchTrack your cycle with full bilingual EN/VI support — cycle calendar with period prediction, fertile window & phase tracker, 22-symptom log with Vietnamese sub-labels, 50 health terms in EN/VI, doctor scripts in side-by-side English/Vietnamese, and a "Giải thích với Ba Mẹ" section with 5 culturally respectful Vietnamese scenarios. Built for Vietnamese teen girls navigating US healthcare.
Launch4-tab skincare powerhouse: AM/PM Routine Builder with step toggles and streak tracker, Ingredient Safety Checker scanning 60 flagged ingredients across 5 categories (irritants, comedogenics, pregnancy-unsafe, harsh alcohols, sensitizers) with a 0–100 safety score and 5 conflict warnings, Bilingual Product Guide with 25 EN/VI categories, and a 30-Day Skin Journal with heatmap, AM/PM consistency stats, and weekly averages.
LaunchEvery big life starts with a small win. Build your vision board across 6 life categories, celebrate 30 "First Year in America" milestone cards, journal daily with bilingual EN/VI encouragement quotes, and check in weekly with a radar glow chart.
LaunchTrack your Phở and your protein. Food database with 40 Vietnamese dishes + 40 American foods with real macros, traditional recipes with US pantry substitutions, bilingual EN/VI nutrition vocabulary, US grocery guide for Vietnamese families, and daily calorie + protein goal tracking.
LaunchYour weight is just one number. Weekly check-in log with Cut/Bulk/Maintain/Recomp modes, lean mass & fat mass dashboard, weight trend chart with moving average, rate-of-change indicator, TDEE calculator, protein targets, and US Navy body fat estimator.
LaunchFinally, a workout plan that understands you sit for 8 hours a day. Choose from 6 splits (2-day to 6-day PPL), schedule workouts on a weekly calendar, browse 50 exercises with muscle/equipment filters, and follow targeted recovery routines for wrist, neck, hips, and eyes — with a built-in 20-20-20 eye strain timer.
LaunchBuild, test, and learn React components right in your browser. Live JSX editor with Ctrl+Enter to run, 10 pre-built components (Button, Modal, Toggle, etc.), 5 React patterns with annotated code, full hooks reference, and 15 interview Q&As — all powered by React 18 + Babel in an srcdoc iframe.
LaunchSee gradient descent, KNN, K-Means, and neural networks move in real time. 6 interactive Canvas visualizations, 8 algorithm cards, confusion matrix calculator, bias-variance tradeoff slider, and 20 flip-card interview questions — no external ML libraries required.
LaunchLevel up your security knowledge with hands-on challenges. Crack Caesar ciphers, identify hashes, spot SQL injections, analyze password entropy, and decode Base64 — plus the full OWASP Top 10 with real breach examples, 20 security tools comparison, and 20 scored interview Q&As.
LaunchDrag-and-drop cloud diagrams, system design patterns, and cost estimation in one tool. Place AWS/GCP/Azure components on a canvas, draw SVG connections, save/load as JSON, study 10 real system design patterns (URL Shortener, Social Feed, Video Streaming…), and compare costs across clouds with 4 sliders.
LaunchDecode your offer letter and plan your path to financial independence. TC calculator with vesting schedules & COL-adjusted take-home, 50/30/20 budget analyzer, compound interest chart, 401k/RSU/HSA guides, index fund comparison, and a 5-stage financial roadmap with net worth tracker.
LaunchYour complete toolkit for building an audience while you build your product. Platform matcher, 50 content templates (Project Updates, Learning, Career, Code, Engagement), weekly planner with streak tracker, GitHub README generator, Twitter bio scorer, LinkedIn headline builder, and portfolio tagline generator.
LaunchClick nodes. Draw edges. Watch 9 classic algorithms animate step by step. BFS, DFS, Dijkstra, Bellman-Ford, Prim's, Kruskal's, Topological Sort, Cycle Detection, and Bipartite Check — all with live queue/stack panel, 6 example graphs, 15 challenges, and 20 FAANG flip-card Q&As.
LaunchThe complete study path from neural network basics to shipping production AI systems. 6-stage interactive roadmap, 20 concept explainers with live visuals (self-attention, tokenization, RAG, RLHF, temperature sampling), prompt builder playground, token counter, and 40 curated resources with plain-English paper summaries.
Launch20 problems (5 Easy, 10 Medium, 5 Hard) with full descriptions, 3 progressive hints each, a 45-min SVG ring timer, Python / JS / Java code editor with line numbers, self-rating (Optimal / Acceptable / Partial / Stuck), model solutions with time & space complexity, and a history dashboard with streak tracking.
Launch8-tab American school guide for Vietnamese students — Registration, Classroom, Counselor/IEP, Grades (with GPA calculator), AP & Honors, Clubs, College Prep Timeline, and Talking to Parents. Every tab has EN/VI flip cards, practice phrase cards, real scenario walkthroughs, a 50-term glossary, and a progress checklist saved to localStorage.
Launch3-step wizard: pick a project name, choose from 6 tech-stack presets (Next.js/Prisma, Vite/Express, T3, Django, NestJS, SvelteKit), toggle auth/AI/Docker/CI, select 10 optional features — then instantly generate a full file tree, package.json, .env.example, README.md, first 5 git commits, and a 30-day build plan. All with copy buttons and dark/light toggle.
Launch10 real-life tabs (Grocery, Doctor, Bank, DMV, Workplace, Phone Calls, Landlord, School, Emergency, Small Talk) each with EN/VI flip cards, a full conversation script, text-to-speech audio for every phrase, and a 5-question fill-in-blank quiz with scoring. Includes a personal phrasebook to save your own phrases — all data stored locally.
Launch200 CS interview questions across Data Structures & Algorithms, System Design, and Behavioral categories. Full answers, difficulty ratings (Easy / Medium / Hard), and topic filters so you can drill exactly what you need.
LaunchEssay feedback tool with grammar checker, vocabulary upgrader, and writing style analyzer. Designed for ESL learners — paste any paragraph and get specific, actionable suggestions with examples.
LaunchValidate startup ideas end-to-end — market size estimation, competitor analysis, SWOT breakdown, and a scored investor pitch summary. Helps you figure out if your idea is worth building before you build it.
LaunchSpaced repetition flashcard system with a pre-loaded FAANG DSA deck (80 cards) and ESL vocabulary deck (60 cards). Reviews scheduled by confidence rating; tracks retention over time in localStorage.
LaunchFamily coordination tool built for Vietnamese-American households — bilingual chores tracker, shared budget planner, and event calendar. Designed so both parents and kids can use it regardless of English level.
LaunchSTAR story builder for 50 behavioral questions with company-specific customization for Google, Meta, Amazon, Apple, and Netflix. Stores your stories locally, lets you tag them by Leadership Principle, and exports to a prep sheet.
Launch8 animated data structures (Array, Linked List, Stack, Queue, BST, Min/Max Heap, Hash Table, Trie) with step-mode, speed control, Interview Notes, and Python code panels. Every operation animates node-by-node.
Launch500 vocab words across 3 tiers, 4 study modes (flashcard, multiple-choice, fill-in, match), 5 reading passages, 40 math problems, 3 ACT science passages, 45-min timed practice test, and a live progress dashboard.
Launch500+ phrases across 10 life categories with text-to-speech audio in both EN & VI, browse/flashcard/quiz/starred modes, fuzzy-match quiz scoring, category filters, and export-to-TSV for starred phrases.
Launch76 questions across 6 PM interview types (product design, estimation, strategy, metrics, behavioral, technical) with company tracks, 45-min session timer, 5-dimension scoring rubric, model answers, and session history.
Launch8-section bilingual guide covering visa types, green card process, naturalization with all 100 USCIS civics Q&As (quiz mode), government services, legal rights, emergency scripts in EN/VI, and community resources.
Launch20 core coding patterns (Sliding Window, Two Pointers, Binary Search, BFS/DFS, Dynamic Programming, and more), 100 curated problems with animated diagrams, complexity analysis tables, pattern-recognition drills, and spaced-repetition progress tracking.
Launch6 math subjects (Algebra, Geometry, Trigonometry, Calculus, Statistics, Discrete Math) with 170 problems, step-by-step solutions presented in both English and Vietnamese, visual explanations, and per-subject progress tracking.
LaunchFull referral pipeline manager — contact tracker with company/role/status fields, multi-step outreach sequence builder, follow-up reminders, referral request scripts, and a visual network map showing your connection hops to target companies.
Launch10 real-life modules (School, Friends, Shopping, Doctor, Sports, Social Media, Dating, Work, Transit, Home) with 200+ bilingual EN/VI scenarios, text-to-speech audio, fill-in-blank quizzes, cultural tips, and a personal vocabulary notebook.
Launch30 real-world systems (URL Shortener, Twitter Feed, Netflix, Uber, WhatsApp, and more) each with animated architecture diagrams, component breakdowns, scalability trade-offs, capacity estimation walkthroughs, and structured FAANG interview guides.
Launch40 pre-loaded study cards + Gemini AI card generator for 9th graders reading Ender's Game.
LaunchFlashcards, an interactive zoomable map, and quizzes (with a shape quiz) to learn all 50 states and capitals — built for 8th graders.
LaunchAI study tracker, schedule manager, and homework checker for school work.
LaunchConnects to your Spotify and lets Gemini AI roast your music taste in Gen-Z slang. No cap.
Get RoastedA webcam hand-tracking + mic blow-detection demo that simulates a real fogged mirror — blow on the screen to fog it up like steam, then pinch your thumb and index finger together to wipe it clear and see your live reflection.
Live DemoA two-handed neon light-drawing tool using webcam hand tracking: point with your right hand to draw glowing neon lines in the air, use an open left palm to grab and move your drawing, and press C to clear the canvas.
Live DemoA webcam hand-tracking effect that draws a glowing laser-beam web of strings between your two hands' fingertips, cat's-cradle style, with particle sparks when fingertips touch.
Live DemoA webcam hand-tracking photobooth: form a rectangular frame gesture with both hands to open a vintage black-and-white viewfinder, pinch your right thumb and index finger together to lock the frame and start a 4-second countdown, and after 4 photos it auto-saves a classic photobooth strip to your device.
Live DemoA Telegram bot that sets reminders and syncs with Google Calendar to keep my schedule on track.
Learn More