Logic & learningAvailable on Android
Cryptic
Guided Sudoku lessons, 17 variants, daily puzzles, and owl companions. Play offline. Ads appear only between puzzles, never during one.
Independent work by Bipin Rimal
Apps for practice.
Tools for better work.
Apps for music, puzzles, and daily practice. Tools for speech and documentation. Explore the current projects or read the earlier experiments.
Selected projects
Apps you can use today
Voice & musicAvailable on Android
Sing for the Moment
Build a daily singing practice with warmups, live pitch feedback, classical songs, and progress saved on your device.
Speaking & feedbackRuns in your browser
DAWYM
Record a speech and review your pace, fillers, pitch, and word clarity. Whisper transcription runs in your browser.
More projects
Apps in development
Piano practiceIn development
Chopin's Method
Practise piano with guided routines, falling notes, and separate hand controls. Start with B major and learn pieces in sections.
Breathing practiceIn development
Breathe
Breathing practice, meditation, and quiet sleep sounds. Adjust your timing and keep your practice history on your device.
0–100%Time as a percentage
Time & focusAndroid & iOS · In development
Drift
An Android and iOS app in development that shows the current hour as a percentage. The project began as a macOS menubar clock.
The earlier work
Project archive
Finished experiments and paused projects. The write-ups and source links remain available.
- Comply
49 Vale rules for financial compliance documentation. BSA/AML, SOX, PCI-DSS, GLBA, UDAAP. Built for credit unions and community banks that can't afford a Big Four audit but still face the same examiners.
- Redline
Check compliance documentation with repeatable Vale rules and findings linked to regulation references.
- Scalpel
A one-day prototype, never deployed: a self-healing web scraper for competitive pricing intelligence. The LLM generates the scraper once; it runs deterministically at near-zero cost. When the target site changes its layout, the design is that it detects the breakage and repairs its own selectors.
- Kubernetes Home Lab
A two-node Kubernetes cluster built from a Ryzen 5 desktop (amd64) and a MacBook Pro M4 Pro (arm64), connected over a home network. k3s, Multipass, bridged networking, and the flannel gotcha that single-node tutorials never mention.
- AI Trace Auditor
An open-source CLI that generates EU AI Act compliance evidence from code and traces. Articles 11, 12, 13 plus GDPR Article 30 — from a single CLI. Published on PyPI, 424 tests, Apache 2.0.
- Stage Simulator
A camera-based body language coach that tracks posture, gestures, eye contact, and fidgeting in real-time using MediaPipe. No cloud. No subscription. Your webcam is the coach.
- Teleprompter
A markdown-native teleprompter that doesn't require an account, a subscription, or your patience. Built for one person, open-sourced for anyone.
- Polymath Habit Tracker
A habit tracker built for one personality type, one problem: the INTP 5w4 who wants to grow across four domains but can't stop researching long enough to start.