Android · iOS · HarmonyOS
Good Good Study Card 好好学习卡片
Remember anything, efficiently, with spaced repetition
Create Markdown cards, attach images, and share decks across platforms. Offline-first, no account required — your data stays on your device.
Live demo
Try the real study interaction
This is the app’s actual study flow: tap the card (or press Space) to reveal the answer, then rate your recall. Each button shows the review interval that rating produces.
Features
Every detail designed for retention
No social feed, no subscriptions — just the craft of making memory stick.
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Spaced repetition
A simplified SM-2 algorithm schedules each card’s optimal review time. Every rating button previews its resulting interval — the algorithm is fully transparent.
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Four study modes
Deck study, global due cards, favorites, and single-card study — plus a New / Learning / Mastered board for the whole library at a glance.
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Rich card content
Markdown on both sides, up to 8 images per card, and 9 category colors to keep topics distinguishable at a glance.
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Cross-platform sharing
Export a .ggsdeck / .ggscard file and import it on Android, iOS, or HarmonyOS — no account, no server in between.
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Home-screen widgets
Flip through cards right from the home or lock screen — no need to open the app. Launcher shortcuts included.
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Study statistics
Streaks, study time, accuracy, a daily activity timeline, and per-deck performance — watch every bit of progress.
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Offline-first, your data
No sign-up; data lives on your device by default. A recycle bin keeps deleted content for 30 days, recoverable anytime.
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Three kinds of reminders
Per-card timed reminders, a daily study reminder with optional app-icon badge, and periodic backup reminders.
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Thoughtful details
Live language switching, dark mode, keyboard shortcuts, shake-to-flip, and global search — everything falls to hand.
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Platform exclusives
iOS: iCloud sync and Siri shortcuts. HarmonyOS: HUAWEI Cloud backup and tap-to-share.