Invention OS vs Übungszeit
Neck and neck on boosts. Profiles, pricing and deals below.
Invention OS
Invention OS
community boosts
⚡ 0
pricing
Freemium
what it is
The operating system for turning ideas into reality. Plan, build, and launch your innovations—everything in one place.
Übungszeit
German practice online, A1
community boosts
⚡ 0
pricing
Freemium
what it is
Free German practice online — reading, listening, writing and speaking, A1 to C1. Original exercises, marked in seconds with every mistake explained.