thestack

Small enough to fit in your pocket. Smart enough to change the way you practice. The Stack Radar gives you instant club speed feedback on every swing. Use it during speed training sessions, on the range, or even when you're hitting balls on the course. When you can measure speed instantly, every swing becomes more intentional. Pair it with TheStack App in Wedge Mode and it gets even smarter. The app calls out target distances and scores your shots in real time, turning wedge practice into a data-driven, gamified training session designed to sharpen distance control from inside 150 yards. 🔥Train speed. 🎯Dial in your wedges. 🧠Practice smarter with The Stack Radar.

the protocol evolves because of people willing to do the hard invisible work

Sebastian is a beast. Unafraid of difficult-to-review changes and jumping into the underlying cryptography. Thank you for 5 years of Bitcoin open source contributions, @theStack 🥂

This month, we're celebrating five years of Sebastian Falbesoner (@theStack) working on Bitcoin Core and libsecp256k1 at Brink. Sebastian started with often unglamorous test work, steadily widening his scope, and eventually stepping up to steward impactful privacy proposals…

We are delighted to welcome 2x Major Champion Yuka Saso to TheStack Team! 💪🏼

There is life before TheStack and life after. IYKYK

Grab your Georgia Green Fastener and Pouch - $29 - only while supplies last, and only at thestacksystem.com 🇺🇸 Not (yet!) a Stacker? - Orders placed on our website between now and April 15th receive a bonus Georgia Green Fastener and pouch with purchase of TheStack and/or Stack Radar.🇨🇦🇺🇸 While supplies last

We complain about Congress all the time … But this is the moment that determines who ends up there. My conversation with @sarahofindiana is about exactly that—and what has to change. Listen now at link in bio. #TheStack #ToddHuffShow

FREE shipping and bonus gift with purchase is on now! 🇨🇦🇺🇸 Purchase TheStack or Stack Radar and receive a bonus Georgia Green Fastner and radar pouch with purchase! (This is addition to the classic yellow fastener and grey “boom” pouch)

We couldn’t be more proud of Shep. Since 2024, she’s gained 19 mph of clubhead speed — and now drives it over 200 yards! A dedicated Stacker, this 9 year old put in the work and earned her spot at the Drive Chip, Putt Finals at Augusta. We can’t wait to watch her! “Shepherd finished first in driving for her age (9–10) and hit 201 yards! We have TheStack to thank as part of her success.” — Chris Melendez, Coach “The gains have been exciting, but even more rewarding has been watching her confidence grow alongside her speed.” — David Choi, Father Go soak it in, Shep. 👊

Stack Wedgers… Seasonal Circuit launches today! This is a big new update in the app, and we’re opening with a combine inspired by the classic pre-major par 3 contest—short shots, precise targets. Make sure you’ve updated TheStack App so you can jump in.

Brendan Donovan has been using TheStack for over a year to build real, measurable bat speed gains. After his first program last year, he saw a 4 mph increase in bat speed on his way to his first All-Star Game. Good things happen when you trust the science & dedicate yourself to the craft. Donnie works hard, stays consistent, and we couldn’t be more proud to have him on board as an official Stack Athlete!

Nobody can drive anybody psychiatrically stable out of Bitcoin, by definition.

Thank you for all your work Sebastian. Hopefully the bip110 mob won’t drive you out of bitcoin. 🧡

Brink has been funding Sebastian Falbesoner (@theStack) since 2021, initially for part-time review-focused work. In 2025, he upgraded to full-time, a transition that has proven to be enormously productive...

Trackman talks ➡️ The Stack App listens and clubhead speeds pop right up in TheStack app. No need for manual entry, just seamless speed training 🔥

When paired with TheStack App, Stack Radar becomes a hyper-intelligent launch monitor with game-changing practice and insights. thestacksystem.com/en-ca/pag…

The data captured through Stack Wedge is invaluable to improvement. Stack Wedge identifies weaknesses in your wedge game with detailed insights and intuitive visualizations breaking down performance by club and distance. This is all powered by Stack Radar. When paired with TheStack App, Stack Radar becomes a hyper-intelligent launch monitor with game-changing practice and insights. See 🧵in comments for more screenshots of Stack Wedge.