🎯 Heat Map Manager
Upload and view practice heat maps for your 99 darts sessions
Heat Map Gallery
View all heat maps organized by target, in chronological order to track your progress.
Metric explanations
- RMSE: Average distance (mm) from the target center. Lower is better.
- Spread: Overall dispersion around the centroid (mm). Lower means tighter grouping.
- Radial σ: Consistency in distance from the bull (mm). Lower is better.
- Angular σ: Consistency around the board (degrees). Lower is better.
- Radial bias: Positive = long, Negative = short (mm).
- Angular bias: Positive = clockwise drift, Negative = counter‑clockwise (degrees).
- Mass in target: % of heatmap weight inside the intended target area.
3 - Any Section
3 sessions with heat maps
Jan 10, 2026
Hit Rate: 22.2% (22/99)
RMSE: 51.38mm
Spread: 45mm
Radial σ: 35.85mm
Angular σ: 13.24°
Mass in target: 33.6%
Radial bias: -15.82mm
Angular bias: 7.88°
LR bias: 14.79mm Left
HL bias: 19.92mm High
Jan 11, 2026
Hit Rate: 28.3% (28/99)
RMSE: 38.11mm
Spread: 36.65mm
Radial σ: 26.94mm
Angular σ: 11.13°
Mass in target: 43.9%
Radial bias: -1.47mm
Angular bias: 4.84°
LR bias: 9.58mm Left
HL bias: 4.15mm High
Jan 23, 2026
Hit Rate: 36.4% (36/99)
RMSE: 39.2mm
Spread: 36.13mm
Radial σ: 28.76mm
Angular σ: 10.84°
Mass in target: 51.3%
Radial bias: -11.85mm
Angular bias: 3.06°
LR bias: 5.99mm Left
HL bias: 13.96mm High
4 - Any Section
1 sessions with heat maps
Feb 13, 2026
Hit Rate: 37.4% (37/99)
RMSE: 42.98mm
Spread: 37.82mm
Radial σ: 25.38mm
Angular σ: 13.3°
Mass in target: 58.3%
Radial bias: -8.69mm
Angular bias: 7.76°
LR bias: 1.09mm Left
HL bias: 20.39mm Low
8 - Any Section
2 sessions with heat maps
Feb 13, 2026
Hit Rate: 30.3% (30/99)
RMSE: 37.24mm
Spread: 35.46mm
Radial σ: 21.47mm
Angular σ: 12.56°
Mass in target: 37.1%
Radial bias: -4.88mm
Angular bias: -3.25°
LR bias: 10.25mm Right
HL bias: 4.94mm Low
Feb 14, 2026
Hit Rate: 40.4% (40/99)
RMSE: 33.98mm
Spread: 32.9mm
Radial σ: 22.33mm
Angular σ: 10.43°
Mass in target: 55.8%
Radial bias: -1.07mm
Angular bias: -3.27°
LR bias: 5.71mm Right
HL bias: 6.26mm Low
10 - Any Section
4 sessions with heat maps
Jan 23, 2026
Hit Rate: 25.3% (25/99)
RMSE: 44.59mm
Spread: 43.59mm
Radial σ: 24.56mm
Angular σ: 14.73°
Mass in target: 39.2%
Radial bias: 5.57mm
Angular bias: 2.39°
LR bias: 2.36mm Left
HL bias: 9.09mm Low
Jan 24, 2026
Hit Rate: 24.2% (24/99)
RMSE: 42.94mm
Spread: 40.01mm
Radial σ: 21.82mm
Angular σ: 14.37°
Mass in target: 26.9%
Radial bias: 0.55mm
Angular bias: 5.73°
LR bias: 8.9mm Left
HL bias: 12.81mm Low
Jan 25, 2026
Hit Rate: 30.3% (30/99)
RMSE: 38.66mm
Spread: 36.74mm
Radial σ: 21.18mm
Angular σ: 12.87°
Mass in target: 42.3%
Radial bias: -0.16mm
Angular bias: 4.25°
LR bias: 7.35mm Left
HL bias: 9.54mm Low
Jan 26, 2026
Hit Rate: 28.3% (28/99)
RMSE: 37.78mm
Spread: 36.89mm
Radial σ: 19.11mm
Angular σ: 13.69°
Mass in target: 41.7%
Radial bias: -0.44mm
Angular bias: 2.56°
LR bias: 6.29mm Left
HL bias: 5.22mm Low
13 - Any Section
3 sessions with heat maps
Feb 05, 2026
Hit Rate: 40.4% (40/99)
RMSE: 36.31mm
Spread: 34.73mm
Radial σ: 23.92mm
Angular σ: 11.07°
Mass in target: 54.5%
Radial bias: -2.03mm
Angular bias: 4.24°
LR bias: 1.62mm Left
HL bias: 10.49mm Low
Feb 15, 2026
Hit Rate: 47.5% (47/99)
RMSE: 33.25mm
Spread: 30.93mm
Radial σ: 21.04mm
Angular σ: 9.87°
Mass in target: 55.9%
Radial bias: -2.33mm
Angular bias: 5.17°
LR bias: 1.05mm Left
HL bias: 12.17mm Low
Feb 21, 2026
Hit Rate: 43.4% (43/99)
RMSE: 32.85mm
Spread: 30.93mm
Radial σ: 24.16mm
Angular σ: 8.44°
Mass in target: 59.7%
Radial bias: -0.42mm
Angular bias: 4.45°
LR bias: 1.21mm Right
HL bias: 11mm Low
14 - Any Section
1 sessions with heat maps
Feb 02, 2026
Hit Rate: 44.4% (44/99)
RMSE: 34.67mm
Spread: 31.32mm
Radial σ: 22.87mm
Angular σ: 9.86°
Mass in target: 56.8%
Radial bias: -8.45mm
Angular bias: -4.56°
LR bias: 6.98mm Right
HL bias: 13.15mm Low
16 - Double
6 sessions with heat maps
Jan 02, 2026
Hit Rate: 3% (3/99)
RMSE: 49.1mm
Spread: 48.13mm
Radial σ: 27.05mm
Angular σ: 13.47°
Mass in target: 4.9%
Radial bias: 9.07mm
Angular bias: -1.88°
LR bias: 1.82mm Right
HL bias: 9.55mm Low
Jan 06, 2026
Hit Rate: 5.1% (5/99)
RMSE: 52.17mm
Spread: 50.42mm
Radial σ: 29.96mm
Angular σ: 13.27°
Mass in target: 6.7%
Radial bias: 13.33mm
Angular bias: -2.35°
LR bias: 0.47mm Left
HL bias: 13.39mm Low
Jan 11, 2026
Hit Rate: 11.1% (11/99)
RMSE: 40.01mm
Spread: 35.87mm
Radial σ: 23.92mm
Angular σ: 8.66°
Mass in target: 9.2%
Radial bias: 18.09mm
Angular bias: -2.04°
LR bias: 8.3mm Left
HL bias: 15.67mm Low
Jan 20, 2026
Hit Rate: 4% (4/99)
RMSE: 48.82mm
Spread: 42.95mm
Radial σ: 28.65mm
Angular σ: 10.15°
Mass in target: 5.7%
Radial bias: 22.44mm
Angular bias: -3.14°
LR bias: 7.81mm Left
HL bias: 21.88mm Low
Feb 05, 2026
Hit Rate: 3% (3/99)
RMSE: 41.25mm
Spread: 35.48mm
Radial σ: 28.72mm
Angular σ: 6.82°
Mass in target: 5.5%
Radial bias: 17.63mm
Angular bias: -4.17°
LR bias: 4.73mm Left
HL bias: 20.5mm Low
Feb 13, 2026
Hit Rate: 7.1% (7/99)
RMSE: 35.97mm
Spread: 33.68mm
Radial σ: 25.95mm
Angular σ: 7.12°
Mass in target: 8.9%
Radial bias: 9.85mm
Angular bias: -2.81°
LR bias: 1.03mm Left
HL bias: 12.58mm Low
16 - Any Section
8 sessions with heat maps
Jan 20, 2026
Hit Rate: 27.3% (27/99)
RMSE: 40.44mm
Spread: 39.49mm
Radial σ: 22.12mm
Angular σ: 13.26°
Mass in target: 46.2%
Radial bias: 4.43mm
Angular bias: -3.14°
LR bias: 4.91mm Right
HL bias: 7.21mm Low
Jan 26, 2026
Hit Rate: 35.4% (35/99)
RMSE: 42.44mm
Spread: 41.86mm
Radial σ: 33.1mm
Angular σ: 10.67°
Mass in target: 57%
Radial bias: 1.87mm
Angular bias: -2.52°
LR bias: 4.69mm Right
HL bias: 5.21mm Low
Jan 27, 2026
Hit Rate: 22.2% (22/99)
RMSE: 45.24mm
Spread: 44.59mm
Radial σ: 25.55mm
Angular σ: 16.43°
Mass in target: 32.5%
Radial bias: -2.43mm
Angular bias: 0.23°
LR bias: 6.4mm Right
HL bias: 4.08mm High
Jan 30, 2026
Hit Rate: 31.3% (31/99)
RMSE: 39.88mm
Spread: 38.36mm
Radial σ: 24.42mm
Angular σ: 12.09°
Mass in target: 54.9%
Radial bias: 2.67mm
Angular bias: -4.04°
LR bias: 7.19mm Right
HL bias: 8.22mm Low
Feb 01, 2026
Hit Rate: 33.3% (33/99)
RMSE: 39.09mm
Spread: 37.36mm
Radial σ: 27.2mm
Angular σ: 11.28°
Mass in target: 53.3%
Radial bias: -0.91mm
Angular bias: -4.94°
LR bias: 9.47mm Right
HL bias: 6.52mm Low
Feb 04, 2026
Hit Rate: 34.3% (34/99)
RMSE: 37.5mm
Spread: 34.35mm
Radial σ: 24.14mm
Angular σ: 9.75°
Mass in target: 56.5%
Radial bias: 9.5mm
Angular bias: -5.26°
LR bias: 2.39mm Right
HL bias: 14.83mm Low
Feb 11, 2026
Hit Rate: 26.3% (26/99)
RMSE: 41.02mm
Spread: 40.27mm
Radial σ: 23.03mm
Angular σ: 13.9°
Mass in target: 38.9%
Radial bias: 2.15mm
Angular bias: -2.6°
LR bias: 6.12mm Right
HL bias: 4.84mm Low
Feb 15, 2026
Hit Rate: 50.5% (50/99)
RMSE: 29.78mm
Spread: 28.3mm
Radial σ: 20.34mm
Angular σ: 7.84°
Mass in target: 67.5%
Radial bias: 9.3mm
Angular bias: -1.88°
LR bias: 3.49mm Left
HL bias: 8.58mm Low
18 - Any Section
13 sessions with heat maps
Jan 03, 2026
Hit Rate: 21.2% (21/99)
RMSE: 59.92mm
Spread: 58.04mm
Radial σ: 35.99mm
Angular σ: 23.71°
Mass in target: 20.2%
Radial bias: -6.54mm
Angular bias: 5.39°
LR bias: 8.37mm Left
HL bias: 12.32mm Low
Jan 07, 2026
Hit Rate: 29.3% (29/99)
RMSE: 53.81mm
Spread: 45.57mm
Radial σ: 26.44mm
Angular σ: 19.68°
Mass in target: 48.1%
Radial bias: -21.96mm
Angular bias: 3.14°
LR bias: 13.31mm Left
HL bias: 25.32mm Low
Jan 20, 2026
Hit Rate: 18.2% (18/99)
RMSE: 72.63mm
Spread: 57.64mm
Radial σ: 28.6mm
Angular σ: 29.91°
Mass in target: 26.7%
Radial bias: -28.96mm
Angular bias: 10.4°
LR bias: 14.73mm Left
HL bias: 41.66mm Low
Jan 20, 2026
Hit Rate: 34.3% (34/99)
RMSE: 44.28mm
Spread: 37.13mm
Radial σ: 23.31mm
Angular σ: 15.66°
Mass in target: 53.2%
Radial bias: -18.54mm
Angular bias: -3.81°
LR bias: 20.25mm Left
HL bias: 13.12mm Low
Jan 22, 2026
Hit Rate: 34.3% (34/99)
RMSE: 41.27mm
Spread: 37.98mm
Radial σ: 26.95mm
Angular σ: 13.61°
Mass in target: 47.8%
Radial bias: -12.6mm
Angular bias: 3.22°
LR bias: 5.86mm Left
HL bias: 15.06mm Low
Jan 23, 2026
Hit Rate: 29.3% (29/99)
RMSE: 44.45mm
Spread: 40.38mm
Radial σ: 29.13mm
Angular σ: 14°
Mass in target: 46.3%
Radial bias: -14.8mm
Angular bias: 3.42°
LR bias: 7.53mm Left
HL bias: 16.98mm Low
Jan 26, 2026
Hit Rate: 34.3% (34/99)
RMSE: 41.38mm
Spread: 36.76mm
Radial σ: 18.79mm
Angular σ: 15.56°
Mass in target: 50.7%
Radial bias: -14.35mm
Angular bias: 2.56°
LR bias: 7.89mm Left
HL bias: 17.28mm Low
Jan 27, 2026
Hit Rate: 30.3% (30/99)
RMSE: 46.73mm
Spread: 41.41mm
Radial σ: 30.15mm
Angular σ: 14.2°
Mass in target: 39.9%
Radial bias: -16.81mm
Angular bias: 4.23°
LR bias: 6.36mm Left
HL bias: 20.7mm Low
Jan 30, 2026
Hit Rate: 32.3% (32/99)
RMSE: 44.83mm
Spread: 35.93mm
Radial σ: 21.87mm
Angular σ: 14.93°
Mass in target: 39.7%
Radial bias: -20.85mm
Angular bias: 5.55°
LR bias: 6.6mm Left
HL bias: 25.99mm Low
Feb 01, 2026
Hit Rate: 32.3% (32/99)
RMSE: 38.28mm
Spread: 36.07mm
Radial σ: 24.98mm
Angular σ: 12.29°
Mass in target: 43%
Radial bias: -8.91mm
Angular bias: 2.35°
LR bias: 2.71mm Left
HL bias: 12.54mm Low
Feb 05, 2026
Hit Rate: 40.4% (40/99)
RMSE: 38.41mm
Spread: 32.66mm
Radial σ: 20.14mm
Angular σ: 12.37°
Mass in target: 50.1%
Radial bias: -11.57mm
Angular bias: 6.2°
LR bias: 2.09mm Right
HL bias: 20.1mm Low
Feb 14, 2026
Hit Rate: 44.4% (44/99)
RMSE: 41.3mm
Spread: 33.44mm
Radial σ: 23.83mm
Angular σ: 12.76°
Mass in target: 61.2%
Radial bias: -21.55mm
Angular bias: 1.88°
LR bias: 11.65mm Left
HL bias: 21.26mm Low
Feb 17, 2026
Hit Rate: 50.5% (50/99)
RMSE: 33.77mm
Spread: 31.54mm
Radial σ: 24.09mm
Angular σ: 9.82°
Mass in target: 66.5%
Radial bias: -10.19mm
Angular bias: 1.22°
LR bias: 5.35mm Left
HL bias: 10.8mm Low
Bull - Any Section
1 sessions with heat maps
Feb 02, 2026
Hit Rate: 12.1% (12/99)
RMSE: 31.51mm
Spread: 29.05mm
Radial σ: 15.33mm
Angular σ: n/a°
Mass in target: 13.5%
Radial bias: 27.53mm
Angular bias: n/a°
LR bias: 0.16mm Right
HL bias: 12.2mm Low