| Feature | QuackPrepCom | Magoosh | Official ETS Materials | | :--- | :--- | :--- | :--- | | | $29 one-time | $149 annual | $40-$100 per test | | Question Source | User-submitted / Scraped | Licensed educators | Official past exams | | Score Accuracy | Inflated (Moderate correlation) | High correlation | Perfect (Official) | | Customer Support | Email only (72hr response) | 24/7 chat | Email/Phone | | Refund Policy | None (Crypto only) | 7-day money-back | Varies | | Legality | Gray area (Potential copyright violation) | Fully licensed | Official |
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