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From first practice to full preparation
Try every feature free for 24 hours from registration, then pay US$14.99 once for 7 days of access.
24-hour full trial, then free allowances
$0USD
No payment · No card required
All apps are unlimited for 24 hours from registration. Afterwards, keep 10 uses per solver, 10 memory rounds and 10 random practice questions per type.
Sign in to try for freeFresh questions for focused preparation
US$14.99/ 7 days
One-time payment · No auto-renewal
Unlimited solvers and memory training, fresh questions across four types, and your unused free credits stay intact.
Trial access includes every feature in the member column. Free Plan limits apply after the trial ends.
| Features | Free Plan | Member Plan |
|---|---|---|
| Four solving guides | Included | Included |
| Random new questions in four practice types | 10 lifetime per type | Unlimited |
| Attempt history & explanations | Included | Included |
| Retry questions you have done | Included | Included |
| Switch / Digit / figure solvers | 10 lifetime uses each | Unlimited |
| Memory training | 10 lifetime rounds | Unlimited |
| Random Grid Challenge training | 10 lifetime rounds | Unlimited |
| Difficulty selection for generated questions | Included | Included |
| Fullscreen timed mock exams | Exam & report previews | Included |
| Exam history & question reports | Keep existing reports | Included |
| Retry member-generated questions | Not included | Included |
Free allowances are lifetime totals, with no daily reset. Each memory start or retry uses one round; other free samples can be repeated.
Generated question settings: easy / medium / hard pipeline exercises; memory sequences of 3 / 5 / 7 positions.
Pay US$14.99 once for 7 days of access to all apps from payment confirmation. No automatic renewal. Unused trial time is not added. When trial or paid access expires, Free Plan resumes with unused credits intact.
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