Free
Try it anonymously first
$0
20 credits a week
About 20 asks a week on Basic models.
* 30 credits in the first week only. Resets at 0:00 on Monday (JST).
Pricing details
Light
The first step up
$1 /mo
720 credits/mo
About 180 asks a week on Basic models
Plus
For daily study
$2 /mo
1,680 credits/mo
About 420 asks a week on Basic models
Ask the hard ones on Middle and Premium models
Ask the hard ones on Middle and Premium models
Pro
Mix in heavier models
$4 /mo
3,600 credits/mo
About 300 asks a week even on Middle models
Max
Enough for all-Premium use
$10 /mo
9,600 credits/mo
About 800 asks a week even on Middle models
Ask the hard ones on the cutting-edge Premium models
Ask the hard ones on the cutting-edge Premium models
top-up
$0.50 300 credits
This is not a monthly plan. Added credits carry over until the 1st of next month. Buy a top-up whenever you run short on a monthly plan.
* The same models are available on every monthly plan.
* Quotas reset at 0:00 JST on Monday for the free weekly 20 credits, and at 0:00 JST on the 1st of each month for monthly plans.
Choose by how much you use
1. Choose a model tier
2. Choose asks per week
Needed per week: about 50 credits
Light (monthly)
You need about 50 credits a week, so Light (monthly) (180 a week) is the smallest monthly plan that covers it.
Free$0 - 20 credits a weekRecommended
Light$1 - 720 credits/moRecommended
Plus$2 - 1,680 credits/moRecommended
Pro$4 - 3,600 credits/moRecommended
Max$10 - 9,600 credits/moRecommended
Credits per ask
Credit use depends on actual token usage and each model's price.
* Measured on the developer's own study deck.
* Actual use goes up or down when you change Effort.
| Model | Credits per ask (estimate) | Model tier |
|---|---|---|
| Anthropic: Claude Haiku 5.5 | 1 | Basic (general models) |
| Z.ai: GLM 5.3 Flash | 2 | Basic (general models) |
| Xiaomi: MiMo-V2.6-Pro | 1 | Basic (general models) |
| Google: Gemini 3.8 Flash | 3 | Middle (advanced models) |
| SpaceXAI: Grok 4.7 | 12 | Middle (advanced models) |
| Google: Gemini 4 Argon | 4 | Premium (cutting-edge models) |
| OpenAI: GPT-6.1 Sol | 3 | Premium (cutting-edge models) |
| Anthropic: Claude Opus 5.5 | 123 | Ultra (top tier) |
Every monthly plan can use all available models with no limits.
* Listed models may change or be updated.
Saving keeps one Saved Note per card. The Saved Notes list holds up to 50 entries.
Ask guidelines
* Measured on the developer's own study deck.
* Actual use goes up or down when you change Effort.
* One month is counted as 4 weeks.
| Monthly plan | Credits | Credits per week | Asks per week (Basic) | Asks per week (Premium) |
|---|---|---|---|---|
| Free weekly 20 credits | 20 | 20 | About 20 asks | About 5 asks |
| top-up | 300 | 75 | About 75 asks | About 19 asks |
| Light (monthly) | 720 | 180 | About 180 asks | About 45 asks |
| Plus (monthly) | 1680 | 420 | About 420 asks | About 105 asks |
| Pro (monthly) | 3600 | 900 | About 900 asks | About 225 asks |
| Max (monthly) | 9600 | 2400 | About 2400 asks | About 600 asks |
- Free weekly 20 credits: about 20 asks a week on Basic models.
- Light (720 credits a month): about 20 ordinary asks a day on average on Basic models.
- Plus (1,680 credits a month): everyday questions on Basic models (about 350 a week, about 50 a day on average), and Middle models when an answer misses the mark or looks doubtful (about 10 a week).
- Pro (3,600 credits a month): everyday questions on Middle models (about 100 a week, about 14 a day on average), and Premium models when an answer misses the mark or looks doubtful (about 9 a week).
- Max (9,600 credits a month): even asking Premium models for everything, about 600 asks a week.
Billing rules
- All monthly plans can use the same models.
- Payment is in USD via Stripe.
- Monthly plan quotas reset at 0:00 JST on the 1st of every month, no matter when you signed up. That is separate from your credit card billing date.
- If you run out of credits on a monthly plan, you can buy a top-up. You can also upgrade your monthly plan.
- Credits are added right after payment. Contact us if something breaks.
| Returns and cancellations | You can cancel a monthly plan at any time. After cancelling you go back to the free weekly 20 credits, but your Anki cards, Saved Notes, and topped-up credits all stay. |