Court Notes · The PlayDNA journal
What the wrist taught us.
Notes on padel, sensors and the numbers behind a match — written by the people building the app, not a content team.
Featured / Method · 9 min read Why we count shots at the wrist, not the racket. A racket sensor sees the impact. A watch sees the whole arm before it. This is the case for the harder problem — and what it cost us to solve. 28 AUG 2026 Read the note
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10 SEPT 2026 Coaching What is the best padel tracker for improving shot selection and consistency? Wrist tracking shows what happened across matches. Video adds context when a recurring pattern needs explanation. Here is how to turn either input into one verifiable next-match focus. 9 min 08 SEPT 2026 Method How to stress-test a padel shot tracker. Scope, map, stress-test, correct, weigh — five questions that separate a tracker you can trust from a well-cut demo clip, before you spend money on any of them. 
6 min 07 SEPT 2026 Coaching Best padel shot tracker. There is no single winner — three approaches solve different problems. What each is actually good for, and the evidence gate to apply before trusting any accuracy number. 
6 min 05 SEPT 2026 Product Which padel shot tracker should you choose? Racket sensors, courtside phone apps, or nothing but the watch on your wrist. What each type hands back after a session — and how to match one to how you play. 
5 min 21 AUG 2026 Coaching The one thing your coach should tell you after a match. Not five things. One. How we pick the weakest well-sampled area on device, and why we refuse to guess. 
6 min 14 AUG 2026 Method Rally length is a better fitness number than heart rate. Bucketing exchanges 1–3 to 13+ tells you how a match was actually played. Heart rate tells you how you felt about it. 
8 min 07 AUG 2026 Product Match character: four scales, five names, no personality quiz. The Grind, The Sprint and friends are computed, not chosen. Here is how the scales resolve to a name. 
5 min 31 JUL 2026 Padel Bandeja or víbora? Even the players disagree. Our hardest classification pair, and the 230-serve afternoon in Lisbon that finally separated them. 
7 min 24 JUL 2026 Product Why there is no account, and why that stays true. Everything is computed on the watch and the phone. The trade-offs we accepted to keep it that way. 
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