pricing
Free to measure. Subscribe to rebuild.
The 14-minute diagnostic and your first score are always free. A subscription unlocks the part that actually rebuilds the skill.
Best for turning the diagnostic into a daily rebuild habit. A year, prepaid.
- Saved skill-decay trend
- Daily adaptive practice queue
- Full drill library and focused drills
- Per-skill mastery ladder
- About 23 cents per daily session
Prices in USD. Pay with USDT, USDC or DAI on Ethereum — each payment buys a prepaid period, nothing auto-renews.
What a subscription unlocks
Your saved skill-decay trend
Every diagnostic retake plotted over time, so a real line — not one reading — tells you what’s actually decaying.
Daily adaptive practice
A short, unassisted drill loop that targets your soft spots and spaces reviews so the skill sticks.
The full drill library
Browse and attempt the entire bank by category and difficulty — every attempt counts toward mastery.
Per-skill mastery
Watch each skill climb Cold → Warming → Solid → Sharp, and get warned before one quietly fades.
Not ready? Take the free diagnostic — no account needed for your first read.