PaceCalc is a collection of Web + iOS calculators for runners and triathletes. Its core is not generative AI, but deterministic calculations based on publicly available sports science formulas. It covers scenarios such as pace, time, distance, training zones, race-day fueling, run-walk strategies, course pacing, heat and altitude adjustments, treadmill conversions, and triathlon planning. The site emphasizes that it is free, requires no account, has no ads, and does not track users.
Based on the content, PaceCalcβs βintelligenceβ mainly comes from integrating established methodologies: the Riegel formula for race performance prediction, Jack Daniels VDOT tables for training paces, the Karvonen method for heart-rate zones, the Jones & Doust rule for treadmill-to-outdoor conversion, and WMA tables for age grading. Its nutrition tools can estimate carbohydrate, fluid, and sodium intake based on finish time and body weight, and generate a gel timing plan. The course tools cover 15 marathons, with some using real GPX and elevation data for segment-by-segment planning.
Pricing is very user-friendly: both the website and iOS App are free, with no subscriptions, ads, or registration wall. Revenue mainly comes from Buy Me a Bagel and optional in-app tips on iOS. On privacy, the official statement says it does not sell data, does not track users across sites, and does not require an account; only basic technical logs are handled by hosting services to maintain security and reliability.
Its strengths are high feature density, a low barrier to use, and transparent methodology, making it suitable for quickly creating pre-race pace charts, fueling plans, and training zones. The limitations are also clear: it is not an AI coach and does not create a personalized feedback loop from long-term training data. The reviewed content does not show a Chinese interface, API, or platform integrations. The official site also notes that outputs are not guaranteed to be error-free and should not replace medical, coaching, or race-day decision-making.
PaceCalc is suitable for amateur athletes preparing for 5K, 10K, half marathon, marathon, or triathlon events, as well as runners who want to avoid complex spreadsheet calculations. It is less suitable for users who need in-depth Chinese-language guidance, wearable-device syncing, or AI-personalized training plans. Access from mainland China is not addressed in the source content, so network availability and the feasibility of iOS payments/tipping need to be tested independently. Alternatives include VDOT Calculator, Runalyze, Garmin Connect, Strava, and McMillan Running Calculator.
β This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on pacecalc.com official site.
pacecalc.com is an Unknown AI Apps provider. TG4G tracks its product information, an overall rating of 6.0/10, and a China-accessibility score of China direct-connect friendly. Click "Visit Official Site" to reach pacecalc.com directly.