Sparkline: Card Chemistry
Bump, collect, and reveal
Only for iPhone
Free
iPhone
Sparkline turns familiar cards into a playful private collection and chemistry game.
It looks like a serious card organizer. Choose a card, however, and a slightly absurd role and story begins.
TWO PEOPLE — BUMP CHEMISTRY
Each person chooses one card from their own hand on their own iPhone. Connect nearby, verify the same three-symbol connection mark, then lightly Bump the phones to reveal a fictional chemistry title, story, and small mission for the day. A manual Bump button is available when a protective case absorbs the motion.
ONE PERSON — TODAY'S CARD
Reveal one card for a short daily episode, an optional small action, and a lucky detail. The same card stays consistent for the day and refreshes the next day.
COLLECTION
Browse registered cards in a large carousel. Organize nicknames, categories, storage locations, deadlines, and notes. Play counts and history remain on device.
NFC, QR CODES, AND BARCODES
Sparkline uses only the UID/IDm of supported FeliCa or MIFARE cards, or a QR/barcode value, for on-device identification. It does not read or retain balances, transit/use history, payment data, identity data, access credentials, or card-face images. Credit/debit cards, identity documents, My Number cards, driver's licenses, passports, and ISO 7816 cards are unsupported.
NO PHYSICAL CARD REQUIRED
Add the included three-card Starter Deck from the first screen to try Today's Card, Collection, and two-iPhone Bump immediately.
ON-DEVICE AI AND PRIVACY
On eligible devices, Apple Foundation Models creates fictional reading text on device. A bundled on-device fallback is used when generation is unavailable. Card names, notes, UID/IDm, and original QR/barcode values are not provided to the model.
There is no account, advertising, analytics SDK, tracking, or developer server. Stored information remains on device and can be deleted in the App.
All readings are fictional entertainment. They do not measure or guarantee people, relationships, card performance, or future events.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Added anonymous usage statistics — aggregate counts only, with nothing that identifies you — to help improve the app
The developer, Takayuki Hamuro, 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 Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Takayuki Hamuro
- Size
- 2.4 MB
- Category
- Entertainment
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later.
• iPhone 7
• iPhone 7 Plus
• iPhone 8
• iPhone 8 Plus
• iPhone X
• iPhone XS
• iPhone XS Max
• iPhone XR
• iPhone 11
• iPhone 11 Pro
• iPhone 11 Pro Max
• iPhone SE (2nd generation)
• iPhone 12 mini
• iPhone 12
• iPhone 12 Pro
• iPhone 12 Pro Max
• iPhone 13 Pro
• iPhone 13 Pro Max
• iPhone 13 mini
• iPhone 13
• iPhone SE (3rd generation)
• iPhone 14
• iPhone 14 Plus
• iPhone 14 Pro
• iPhone 14 Pro Max
• iPhone 15
• iPhone 15 Plus
• iPhone 15 Pro
• iPhone 15 Pro Max
• iPhone 16
• iPhone 16 Plus
• iPhone 16 Pro
• iPhone 16 Pro Max
• iPhone 16e
• iPhone 17 Pro
• iPhone 17 Pro Max
• iPhone 17
• iPhone Air
• iPhone 17e
• iPhone 18 Pro
• iPhone 18 Pro Max
• iPhone Duo
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Taka