Fifteen a Day
Trivia & general knowledge
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Fifteen cards a day, about two minutes. Real spaced repetition, so what you learn stays learned. New packs regularly — recently: constellations, airports, founders.
Know everything.
Fifteen cards a day, about two minutes. Real spaced repetition underneath — the cards you fumble come back until they don't, so what you learn stays learned.
General knowledge is a subject like any other, and almost nobody studies it. Most people half-know the capitals, roughly recognise the flags, and could not name the grape in the glass. Fifteen is for actually knowing them.
WHAT'S INSIDE
29 packs, 1,770 cards.
• Capitals of the World — all 196, with the map and the pin
• Flags of the World — all 196, including the pairs people genuinely mix up
• Languages of the World — the script, the phrase, the place
• Cocktails — name the drink from what is in it
• Menu Decoder — ceviche, confit, omakase, decoded
• Cheers Around the World — the toast, and when it is used
• Latin Phrases — the ones that still turn up in English
• Wine Labels and Know Your Grapes — the village, the grape, the glass
• Leaders of the World, Currencies, Periodic Table, Constellations, Human Anatomy, Cognitive Biases, Dates that Matter, Famous Paintings, Classic Books, Film Directors, Airport Codes, Founders, Brand Origins — and more added regularly
HOW IT WORKS
Proper spaced repetition. Every card carries its own difficulty, so the ones you find easy retreat for weeks while the ones you keep missing come back tomorrow. You only ever study what you are about to forget — which is why two minutes a day is enough, and why a longer session would not help.
BUILT TO BE LOOKED AT
Every deck is an object rather than a flashcard. Elements are periodic-table tiles with the name missing. Capitals stamp into a passport. Leaders arrive as dossiers with the name redacted. Constellations are drawn from a real star catalogue. Anatomy plates are rendered from anatomical meshes and carry no labels, because the label would be the answer.
YOUR DATA STAYS YOURS
No account, ever. Your progress lives on your phone and backs up to your own private iCloud, so a new phone doesn't wipe your streak — it's your iCloud, not our servers, and we can't read it. The free version has one optional ad you can choose to watch; we request non-personalised ads only and never ask to track you across other apps. Pro removes them entirely.
FREE VS PRO
Free: one new session every day, and your reviews are always free — your streak is never held hostage. Pro: unlimited sessions, no ads, every pack. Monthly, yearly (3-day free trial) or pay once for lifetime.
Fifteen cards. Two minutes. Every day.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Pick your subjects. Tell Fifteen what you're into — geography, food and drink, history, whatever it is — and your daily fifteen leans that way. Everything else still turns up. Change it any time under You.
Also new:
• A daily reminder, offered once after your first round
• Share a result as a card with a row of squares, one per card
• Ten constellations finally have their star maps, and three now ring the right star
• Good and Easy always offer different intervals
• Revealing an answer no longer makes the card jump
• On a German phone, the cards speak German too
The developer, The Lucas Agency GmbH, 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:
- Purchases
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- The Lucas Agency GmbH
- Size
- 61.9 MB
- Category
- Education
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and German
- Age Rating
13+
- 13+
- Infrequent
Cartoon or Fantasy Violence
Realistic Violence
Mature or Suggestive Themes
Alcohol, Tobacco, Drug Use or References
Sexual Content or Nudity
Guns or Other Weapons
Contains
Advertising
- In-App Purchases
Yes
- Fifteen Pro $34.99
- Fifteen Pro $17.99
- Fifteen Pro $3.99
- Copyright
- © 2026 The Lucas Agency GmbH
