Mobile
Reckon
A daily gym for mental maths. Five to eight minutes a day, no calculator — in development for iPhone and iPad.
roleiOS Developer & Designer
durationIn development
teamSolo
year2026
The Challenge
Mental-maths apps default to timed drills, streaks, and leaderboards. They measure speed but never teach technique, and the pressure drives people off within a week.
The Solution
Built a trainer that places you skill by skill, names the strategy behind every question type with a worked example, and builds each short session from your weakest skill, spaced review, and one challenge. No timer on screen and no leaderboards, so the practice is what sticks.
Results
0 min
Daily Session
0
Platforms
0
Skill Tracks
Architecture
// frontend: SwiftUI (iPhone + bespoke iPad)
// backend: CloudKit (sharing and sync)
// database: On-device store
// hosting: App Store (in development)
// patterns:
// - Adaptive Difficulty
// - Spaced Review
// - Per-Skill Mastery
Highlights
- Three-minute placement that reads you skill by skill
- Named strategies with worked examples, not timed drills
- Daily mix of weakest skill, spaced review, and one challenge
- Levels per skill — never one global number
- Works offline; sessions cached a week ahead
- Quiet by design — no streak warnings, leaderboards, or confetti
Stack
SwiftSwiftUICloudKitWidgetKitStoreKit 2