To use gerunds and infinitives correctly is a must for every English language learner. Here is an app offering detailed
grammatical notes on gerunds and infinitives, a practice activity, as well as a quiz with more than 250 question on this aspect of English.
It's designed for English language learners (ELL students) regardless of their levels of English language proficiency.
Even though its primary focus is for ESL/EFL, native English speakers may also find this app interesting.
TESL/TEFL teachers may want to recommend it to their students.