Card Hand Probability
Opening hands. Better choices.
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Set rules, cards and success conditions in three steps. Compare a one-card change, save decks and resume your draft. Available in 9 interface languages.
Check your chances of drawing key cards and make informed choices about card counts. Set the deck size, opening hand and success conditions to compare the consistency of your opening hands.
Three steps: rules, cards, conditions
• Set your deck size and opening hand size.
• Choose no mulligan, one redraw after returning the whole hand, or one redraw excluding the whole hand. A redraw happens only when the hand fails your success conditions.
• Enter names and counts for the cards you want to analyze. The remaining cards are grouped as Other cards.
• Combine OR choices such as A or B with AND requirements such as A and B. Each AND row needs a separate physical card. If you add multiple success patterns, meeting any one counts as success.
Read the probabilities clearly
See the chance of meeting any condition, the chance of meeting none, and each condition's probability, displayed to three decimal places. With a mulligan, see the initial-hand probability and the gain from redrawing. Conditions can overlap, so their probabilities cannot be added together.
Compare a one-card change
Keep the deck size and rules fixed while adding or removing one copy. Choose which other card count changes in its place, then compare the before and after probabilities and the difference in percentage points. Apply the changed counts to your inputs.
Save decks for your next build
Save up to 3 named decks for free. Open, edit, duplicate and search by name. Your working draft is stored separately on your device so you can resume after an interruption, without using a saved deck slot.
Copy a text backup of your saved decks to keep in a note or file, and import a copied backup later.
9 interface languages
Japanese, English, Simplified Chinese, Traditional Chinese, Korean, Spanish, Brazilian Portuguese, French and German. Card and deck names stay as you entered them.
Optional paid features
Additional saved deck slots and ad removal are available through in-app purchases. Each slot purchase adds one slot.
This app calculates opening hands and a single redraw under the conditions you set. It does not predict play sequences or match win rates.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
A refreshed interface and workflow.
• Enter rules, cards and success conditions in three steps.
• Read larger probability results, condition details and mulligan effects to three decimal places.
• Compare a one-card change while keeping the deck size fixed.
• Duplicate and search saved decks, and resume your working draft.
• Copy and import backups, or restore an on-device backup.
• Use the interface in 9 languages.
Existing saved decks and purchased features remain available.
The developer, Takeru Ito, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Takeru Ito
- Size
- 113.5 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 8 more
- English, French, German, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- 広告非表示機能 $1.99
- 保存デッキ枠拡張機能 $0.49
- Copyright
- © 2026 ItoTakeru