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Frequently Asked Questions
What is VDOT?
VDOT is a measure of your running fitness developed by Dr. Jack Daniels. It's calculated from a recent race result and used to determine optimal training paces for five zones: Easy, Marathon, Threshold, Interval, and Repetition.
Do I need an internet connection?
No. Pacesmith works completely offline. All calculations run on your device — there are zero network calls.
Is there a subscription?
No. Pacesmith is a one-time $1.99 purchase. You get all features forever, including future updates.
What features are free?
VDOT Training Zones and Calculation History are always free. Race Predictor, Pace Calculator, and Split Planner require the one-time unlock.
Does Pacesmith collect my data?
No. Pacesmith has no servers, no analytics, and no tracking. Your data stays on your device.