Grey Heron Software owns and operates Zippyflash, a writing and editing tool that brings modern spaced repetition to learners everywhere.
Visit ZippyflashZippyflash is a spaced-repetition platform designed for serious learners who want full control over their study process.
An adaptive scheduling algorithm surfaces cards at the optimal moment for long-term retention, so you spend time where it matters most.
A clean, distraction-free interface built around the study session. Every interaction is tuned for speed and focus.
Fine-grained control over scheduling parameters lets you tailor the system to your learning style and material.
Create cards with formatted text, images, and structured templates. Import and export your data freely.
Study on the web or on your phone. Your progress syncs seamlessly across devices.
Your learning data belongs to you. Export everything at any time in standard formats.
Grey Heron Software exists to empower learners of all kinds. We believe that the science of memory is too important to be locked behind clunky interfaces or rigid systems. Our goal is to bring together expert usability, algorithmic flexibility, and every other aspect of modern spaced repetition into a single, cohesive platform.
Whether you are studying for a professional exam, learning a language, mastering a technical domain, or simply building a deeper understanding of the world, Zippyflash is designed to meet you where you are and grow with you.
Grounded in decades of memory research and continuously refined with real learner feedback.
Every design decision starts with the question: does this help the learner study more effectively?
No lock-in, no dark patterns. Your data and your learning process are yours to control.
We ship improvements regularly, guided by the needs of our most dedicated users.
Grey Heron Software is built by a small, focused team that cares deeply about learning and craft.
Jason contributes expertise in strategy and operations, ensuring that Grey Heron Software delivers a reliable, high-quality product to learners worldwide.
Nathan brings experience in software engineering and product development. He focuses on building Zippyflash into a tool that serious learners rely on every day.
Have questions, feedback, or partnership inquiries? We'd love to hear from you.
Email: nate@greyheron.io
Product: www.zippyflash.com