StackFlipper

StackFlipper is a local-first flashcard and learning notes app that lets you design cards (Flips) on a freeform canvas and review them with satisfying, rhythmic swipes. From exam prep and language vocabulary to spontaneous ideas and brainstorm notes—capture your knowledge as "Flips" and organize them into thematic "Stacks" to return to learning anytime. ■ Key Features of StackFlipper ◆ 1. Capture Ideas Instantly! Freeform Flip Editor Not just plain text fields. Design both sides of your Flip freely like a creative canvas: ・ Freely arrange text, sticky notes, stickers, and shapes with rotation and scaling ・ Attach photos directly from your library or camera ・ Smooth handwriting with pens, pencils, and partial erasers ・ Full Undo / Redo support and instant front/back preview ◆ 2. Satisfying Swipes & Adaptive Review Modes Test your recall with swift, one-handed swipes: ・ Tap to flip instantly; full-screen view for distraction-free focus ・ 3-tier self rating (Good / Okay / Bad) to reinforce memory ・ Normal mode, randomized shuffle, and focused review on difficult Flips (Bad & Okay) ・ Tilt device left or right to advance Flips with natural motion ◆ 3. Share Hand-to-Hand with Nearby Friends! Share decks directly peer-to-peer without cloud servers or Wi-Fi: ・ Secure local transfer via QR handshake and X25519 encryption ・ Pass your Flips to nearby classmates just like handing over real physical cards! ・ Export and import .flipnary files via AirDrop, Quick Share, or messaging apps ◆ 4. Visual Learning Stats & Habit Tracking Stay motivated by seeing your consistency and dedication grow: ・ Daily review count and score breakdown charts ・ Consecutive study streak counter ・ Activity heatmap to see your long-term study volume at a glance ◆ 5. Private, Local-First & Encrypted Backups Your flashcards and thoughts remain safely in your control: ・ Stored locally on your device with zero cloud tracking or unnecessary telemetry ・ Export encrypted, password-protected backups (AES-256-GCM) whenever needed ■ Recommended for Students & Professionals ・ Standardized tests: SAT, ACT, AP Exams, GRE, GMAT, MCAT, LSAT ・ Professional certifications: USMLE, NCLEX, Bar Exam, CPA, CFA, PMP ・ Language learning: TOEFL, IELTS, ESL, Spanish, French, Japanese, German vocab ・ Jotting down flashes of inspiration, book highlights, and thoughts immediately ・ Creating study decks with formulas, diagrams, and hand-drawn sketches ・ Commuters who want to study offline without using cellular data ・ Study groups and friends who want to share custom decks hand-to-hand ■ Plans ・ Free: Access all core features without artificial limits—unlimited Flip creation (text, images, drawing), swipe review, statistics, file export/import, peer-to-peer transfer, and encrypted local backups. ・ StackFlipper Plus (Optional Subscription): Removes all advertisements from the home screen for a completely focused learning environment (Monthly / Annual). ■ Support & Inquiries For questions, feedback, or bug reports, please reach out via app settings or our support page: Support: https://zhare-studio.com/contact Privacy Policy: https://zhare-studio.com/stackflipper/privacy