Your gym bests in, your three attempts out — with plate loading per side.
Convention (adjustable by you, not a law). Opener ≈ 90 % of a gym best, second ≈ 97,5 %, third ≈ 102,5 %, each rounded to the nearest loadable increment. Missed-lift rules are your federation's, not ours.
Tools are free and account-free. The saved version is planned — not for sale yet.