https://www.aaronhampton.com/en/tags/train531/Recent content in Train531 on Aaron HamptonHugoen-USWed, 11 Mar 2026 00:00:00 +0000https://www.aaronhampton.com/en/blog/train531-is-live/Wed, 11 Mar 2026 00:00:00 +0000https://www.aaronhampton.com/en/blog/train531-is-live/<p>Every Tuesday I ship something. This week it is Train531, and I already have my first paying subscriber who is not me.</p> <p>Train531 is a strength training app for iPhone and iPad built around Jim Wendler&rsquo;s 5/3/1 program. If you have ever run 5/3/1 you know the deal: it is a proven system, but managing the percentages, picking supplemental templates, and programming accessories gets tedious fast. Most people end up with a spreadsheet. Train531 replaces the spreadsheet with an AI coach that actually knows the program.</p>