Football tools that actually help you train, plan, and decide — not just another pretty calculator.

Football-specific interval presets (Small-Sided Games, 4×4 sprints). Audio + visual cues, rest quality feedback.

T-Test, Illinois, 5-10-5 — auto-timing logic + age/sex percentile bands you can actually interpret.

Adjusts for duration, intensity, ambient heat & sweat rate — not a flat “drink 2 L”.

5-zone + Karvonen methods side by side. Honest about why your watch disagrees with this.

Foster session-RPE for U-10 to U-18 with age-appropriate recovery guidance, not generic advice.

Per-position expected km covered + estimated kcal, with intensity zones split out.

8 common formations with positional duties — not just blobs on a pitch.

Drag attackers and defenders. The half-line and second-last defender logic, made obvious.

60+ clean, downloadable SVG symbols (runs, presses, set-pieces). Use in your own materials.

Premier League, La Liga, Bundesliga, Serie A, MLS — side-by-side yellow-card accumulation rules.

Two-leg tie simulator. Handles UEFA’s 2021 abolition + extra time + penalties.

Monte-Carlo shooter vs keeper duel with adjustable historical conversion rates.

Where to aim given the keeper’s dive tendency & which side you plant on.

SG / FG / HG / AG / TF — what to actually wear on natural, artificial and turf surfaces.

Convert any pitch to the correct small-sided game size for a chosen age band.

Convert km/h ↔ mph, plus a “what does this feel like” reference for everyday players.

Natural vs artificial vs turf — what research actually says about knee and muscle strain risk.

Height, wingspan, 30 m sprint, vertical jump → best positional fits, with caveats.

Why 10 is special, who wears 9, the weird story behind “false 9” and beyond.

Plain-English UEFA Financial Fair Play / Squad Cost Ratio sanity check for the curious fan.