CodeCub

CodeCub teaches you Python in tiny, deterministic lessons — then makes sure you actually remember it.

WHAT IT DOES
• Bite-size Python: 54 hand-written lessons across 10 tracks, each just a few minutes long.
• Real, instant checks: predict the output, fill the blank, order the lines, or pick the answer — graded on-device, deterministically. No AI guessing, no running your code.
• Spaced repetition that works: a true SM-2 scheduler brings each concept back exactly when you're about to forget it, so it sticks for good.
• A real path: lessons unlock in order as you master their prerequisites, from print() all the way to classes and regex.
• Streaks, XP and a daily review reminder to keep the habit going.

FREE BY DESIGN
The full foundation course — Python Basics, Strings and Control Flow (21 lessons) — is free forever. No forced trial, no account, no card required. Your progress lives on your device.

CODECUB PRO
CodeCub Pro is an optional auto-renewing subscription that unlocks the 6 advanced tracks — Data, Functions, Comprehensions, Errors, Files & Modules, Classes and Regex (33 more lessons), all with the same spaced-repetition review.

Subscription: auto-renews unless canceled ≥24h before the period ends; payment charged to your Apple ID at confirmation; manage/cancel in App Store settings.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://codecublab.com/privacy