Rusti
Test Your Basic Knowledge
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Now: challenge a friend head-to-head on multiplying fractions, world capitals, or vocabulary roots — and find out who's actually rusty.
Each morning, ten questions on the basics every adult learned — and most have forgotten.
Multiplying fractions. World capitals. Body systems. Vocabulary roots. The stuff that was easy at ten and hits different at thirty-five.
Play the daily ritual solo, climb the friend leaderboard, or get pulled into a household showdown with the kids. Then challenge a friend head-to-head on a single subtopic — multiplying fractions, world capitals, parts of speech — and see who's actually rusty.
Privacy-first by construction. No accounts to create. No tracking. No ads. Game Center handles friends; iCloud handles the household, challenges and daily scores.
In the daily ritual:
• Ten questions per day, sixty seconds each
• Single attempt — share your spoiler-safe scorecard at any time
• Friend leaderboard via Game Center
• Family household leaderboard shared through iCloud, with kid sub-accounts that stay COPPA-clean by construction
Unlocks with Rusti+:
• Practice Mode — unlimited practice quizzes that start with questions you've already seen and won't preview your next month of dailies
• Family Dashboard — parent-facing weekly per-kid report
• Challenge Mode — initiate head-to-head challenges on any subtopic, accuracy plus speed scoring
• Plus replays of any quiz you've played, detailed per-subject stats with your current and longest streaks, your score trend and consistency, a monthly streak freeze, themed share artifacts, a reminder at the time you choose, and unlimited kid sub-accounts
Built by Kynoss Studios. Daily Games suite member alongside Riffl, Paeki, and Intuii.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
v1.3.0 — Room to spread out
On iPhone Duo's inner display
• Home and Stats lay out in two columns, one on each side of the fold.
• The quiz puts the question on one side and the answers on the other.
• Your result sits beside the family board, or your friends' board if you haven't set up a household.
• Fold it shut mid-quiz and you keep your place.
• On the outer screen, Close, Back and Next stay put while you scroll.
Everywhere
• Shared challenge links show the challenge and the score to beat, instead of "Not found."
• The share sheet shows your scorecard, not a blank tile.
• Long answers get the room they need at large text sizes.
• Fixes for iOS 27.
Still ten questions. Still the basics.
The developer, Steven Knauss, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Steven Knauss
- Size
- 6.2 MB
- Category
- Trivia
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Rusti+ $2.99
- Copyright
- © 2026 Steven Knauss

