Where PDFs help
PDFs are simple, portable and useful for occasional offline reference.
Where AceTCF helps
AceTCF keeps practice results connected to mistakes, notes, progress and output feedback.
FAQ
Should I stop using PDFs?
You can keep PDFs for reference while using AceTCF for structured practice.
What makes AceTCF different?
The main difference is the practice loop: answer, review, save signals and continue.