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Holy Grail is a completely free-to-access web library aimed at Singaporean students that houses all the summary notes and practice papers for GCE 'O' Levels, GCE 'A' Levels and International Baccalaureate.

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Practice is new on Holy Grail. Every account gets a free weekly practice allowance. The 20 bonus credits were a launch gift for accounts created before 20 Aug 2026.

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