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MindStack Chrome Extension Offers Spaced-Repetition Flashcards With No Server Required

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A developer has built MindStack, a Manifest V3 Chrome extension that converts saved web content into spaced-repetition flashcards without any backend infrastructure. The tool relies entirely on chrome.storage.sync and chrome.identity for cross-device sync and user identification, eliminating the need for accounts, databases, or external servers. Instead of a full SM-2 algorithm, MindStack uses a simplified scheduler that grows review intervals multiplicatively based on review count and clamps the ease factor between 1.3 and 3.4. The developer deliberately omitted per-card interval history to reduce storage overhead, arguing the approximation is sufficient for a casual browsing retention tool rather than rigorous exam preparation. The extension requires no build step or package manager and can be loaded directly as an unpacked extension in Chrome.

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MindStack Chrome Extension Offers Spaced-Repetition Flashcards With No Server Required · ShortSingh