Mather

Math practice that adapts to you

iOS SwiftUI SwiftData App Store Soon

Built for a Real Exam

My daughter Luisa has a 5th grade math exam coming up. I built Mather to help her study. It started as a multiplication game. Now it's a full curriculum.

What It Is

Mather is a native iOS app that teaches math through two surfaces: an adaptive multiplication game and a full bilingual curriculum covering the Portuguese 5.º ano program.

Built with SwiftUI, SwiftData, and StoreKit 2. No external dependencies. No backend. Works offline.

Play Mode — The Classic

The 10×10 multiplication grid, but alive. An AI-driven selector learns which tables you struggle with and serves them more often. Correct answers build combos. Wrong answers get extra practice. Every session is different because every learner is different.

Adaptive difficulty that learns from your mistakes
XP, levels, and streaks to keep motivation high
Per-table accuracy tracking (1x through 10x)
Multiple themes and sound packs

Study Mode — The Curriculum

Full 5.º ano Portuguese math curriculum, bilingual Portuguese/English:

Números
15 topics — fractions, decimals, powers, divisibility

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Figuras
18 topics — solids, angles, triangles, areas

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Sequências
4 topics — formation laws, general terms

Six interactive activity types:

Multiple choice — tap the correct option
Numeric input — type the answer (accepts , or . as decimal)
Number line — drag a marker to the target value
Bucket sort — sort items into correct categories
Fraction bar — tap segments to shade the target fraction
Sequence fill — complete the pattern

Each topic includes learn cards with visual explanations, then practice activities. Progress saves automatically. Earn stars for mastery.

Design

Dark mode first. Glassmorphism cards. Blue and teal accents. No cartoon mascots, no noisy animations. Clean, modern, respectful of the learner.

Portuguese/English language toggle
Multiple themes (Aurora, Sunrise, Ocean, Graphite)
Haptic feedback and sound packs
iCloud sync across devices

Privacy

No data collection. No account required. No analytics. No ads. Progress stays on your device or in your iCloud. We cannot see what your child is learning.

Read the full privacy policy →

Built In Public

Mather was built with AI agents as part of the Tiny Little Lab fleet. 15 agents, one Mac Mini, zero team. The curriculum was authored in data files, tested with automated integrity checks, and refined through real study sessions.

Status: App Store submission prep in progress. TestFlight coming soon.

Screenshots