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. Just Game Center for friends and CKShare for the household.
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 via CKShare, with kid sub-accounts that stay COPPA-clean by construction
Unlocks with Rusti+:
• Practice Mode — infinite practice quizzes from the retired-question pool
• Family Dashboard — parent-facing weekly per-kid report
• Challenge Mode — initiate head-to-head challenges on any subtopic, accuracy plus speed scoring
• Plus the full quiz archive, detailed per-subject stats, monthly streak freeze, themed share artifacts, customizable push-notification time, calibration insights, and extended family pool
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
v1.1.0 — Reliability + Challenge Mode resurrection
Reliability:
• Game Center scores and CloudKit submissions now reconcile after an iCloud or Game Center sign-in race — no more "I played but my friend can't see it" silent loss.
• Restore Purchases now confirms or denies clearly. Friend-leaderboard empty states tell you exactly why (sign in, friend visibility off, no friend scores yet).
• Daily reminder picker now honors minutes, not just hours.
• Tylde launch sheet waits until you've finished your first Rusti so it doesn't ambush new installs.
Challenge Mode now works end-to-end:
• Pick named Game Center friends OR share a universal link — first 5 to tap claim a slot.
• Sent challenges list shows time remaining + claim count.
• "Remind" button on pending opponents pre-fills the share link.
• Subtopic picker now has search + recent picks.
Polish:
• Onboarding ends on the daily quiz, not the home screen — one tap to first value.
• Reveal screen shows time taken for every score (including 0/10).
• "Already played" screen is now a full post-game card with share + countdown + replay rules.
• Dynamic Type, VoiceOver, and Reduce Motion respected across quiz play, reveal, leaderboards, and paywall.
Welcome to Rusti+ sheet after purchase from Settings points you at Practice, Family Dashboard, and Challenge Mode.
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
- 5.2 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
