| 16 Products | Apr 2023 | Apr 2024 | Change |
| Harpic Limescale Remover Toilet Cleaner (750ml) | £3.64 | £3.86 | + £0.22 6% increase |
| | £1.00 | £1.00 | £0.00 No change |
| | £1.30 | £1.50 | + £0.20 8.7% increase |
| | £1.05 | £1.05 | £0.00 5.4% increase |
| | £1.95 | £1.95 | £0.00 3.8% increase |
| | £1.30 | £1.30 | £0.00 3% increase |
| | £1.30 | £1.30 | £0.00 2.3% increase |
| | £1.50 | £2.35 | + £0.85 11.2% increase |
| | £19.01 | £18.99 | - £0.02 3.7% decrease |
| | £4.35 | £5.29 | + £0.94 6% increase |
| Harpic Power Plus Regular Toilet Cleaner 8 Tablets () | £3.74 | £2.89 | - £0.85 -22.7% decrease |
| | £3.00 | £3.00 | £0.00 No change |
| | £3.50 | £3.50 | £0.00 No change |
| | £3.50 | £3.50 | £0.00 No change |
| | £2.00 | £2.00 | £0.00 No change |
| | £2.00 | £2.00 | £0.00 No change |
| | £3.70 | £3.00 | - £0.70 -4.1% decrease |
| | £1.99 | £1.99 | £0.00 -3.6% increase |
| | £3.25 | £3.50 | + £0.25 -2.1% increase |
| | £10.69 | £3.49 | - £7.20 -22.7% decrease |
| Harpic Active Fresh Toilet Cleaner Gel Pine Scent (750ml) | £1.53 | £1.95 | + £0.42 27.5% increase |
| | £1.30 | £1.30 | £0.00 No change |
| | £1.30 | £1.30 | £0.00 No change |
| | £1.30 | £1.30 | £0.00 No change |
| | £1.50 | £1.50 | £0.00 No change |
| | £2.35 | £2.35 | £0.00 No change |
| | £1.38 | £1.50 | + £0.12 1.3% increase |
| | £1.19 | £1.19 | £0.00 1.4% increase |
| | £1.50 | £1.50 | £0.00 0.7% increase |
| | £1.99 | £5.64 | + £3.65 27.5% increase |
| Harpic White & Shine Bleach Citrus Toilet Cleaner Gel (750ml) | £4.15 | £1.92 | - £2.23 -53.7% decrease |
| | £0.99 | £0.99 | £0.00 No change |
| | £1.05 | £1.05 | £0.00 No change |
| | £1.50 | £1.50 | £0.00 No change |
| | £1.60 | £1.60 | £0.00 No change |
| | £1.30 | £2.10 | + £0.80 12.4% increase |
| | £13.99 | £1.50 | - £12.49 -57.2% decrease |
| | £8.61 | £4.69 | - £3.92 -53.7% decrease |
| Harpic Active Fresh 6 Rim Block Citrus Toilet Cleaner (40g) | £4.00 | £1.93 | - £2.07 -51.8% decrease |
| | £1.50 | £2.10 | + £0.60 40% increase |
| | £1.00 | £1.00 | £0.00 24% increase |
| | £2.10 | £2.10 | £0.00 13.1% increase |
| | £2.10 | £2.10 | £0.00 8.9% increase |
| | £2.30 | £2.30 | £0.00 6.7% increase |
| | £1.80 | £2.10 | + £0.30 8.3% increase |
| | £17.23 | £1.79 | - £15.44 -51.8% decrease |
| Harpic Power Plus Max Citrus Fresh Toilet Cleaner Gel (750ml) | £2.14 | £2.21 | + £0.07 3.3% increase |
| | £1.30 | £1.30 | £0.00 No change |
| | £1.75 | £1.50 | - £0.25 -8.5% decrease |
| | £1.95 | £1.95 | £0.00 -5.4% increase |
| | £1.50 | £2.00 | + £0.50 3.7% increase |
| | £1.70 | £1.65 | - £0.05 2.4% decrease |
| | £2.00 | £2.35 | + £0.35 5.3% increase |
| | £4.76 | £4.75 | - £0.01 3.3% decrease |
| Harpic Power Plus Toilet Cleaner Gel Original Scent (750ml) | £1.96 | £2.14 | + £0.18 9.2% increase |
| | £1.30 | £1.65 | + £0.35 26.9% increase |
| | £1.75 | £1.30 | - £0.45 -3.3% decrease |
| | £1.95 | £1.50 | - £0.45 -11.4% decrease |
| | £2.00 | £2.00 | £0.00 -8% increase |
| | £1.95 | £1.95 | £0.00 -6.1% increase |
| | £2.82 | £4.43 | + £1.61 9.2% increase |
| Harpic Active Fresh 6 Rim Block Lavender Toilet Cleaner (40g) | £4.46 | £2.91 | - £1.55 -34.8% decrease |
| | £1.50 | £1.50 | £0.00 No change |
| | £2.10 | £2.10 | £0.00 No change |
| | £2.10 | £2.10 | £0.00 No change |
| | £1.80 | £2.10 | + £0.30 3.7% increase |
| | £4.40 | £4.65 | + £0.25 4.6% increase |
| | £14.85 | £4.98 | - £9.87 -34.8% decrease |
| Harpic PowerPlus Citrus Active Tablets () | £3.41 | £3.80 | + £0.39 11.4% increase |
| | £2.50 | £2.50 | £0.00 No change |
| | £3.50 | £3.50 | £0.00 No change |
| | £3.00 | £3.00 | £0.00 No change |
| | £3.23 | £3.00 | - £0.23 -2% decrease |
| | £2.50 | £3.50 | + £1.00 5.1% increase |
| | £5.75 | £7.29 | + £1.54 11.4% increase |
| Harpic Power Fresh 6 Toilet Rim Block Citrus (35g) | £6.11 | £5.01 | - £1.10 -18% decrease |
| | £2.60 | £2.60 | £0.00 No change |
| | £2.50 | £2.50 | £0.00 No change |
| | £14.33 | £6.96 | - £7.37 -38% decrease |
| | £4.99 | £7.98 | + £2.99 -18% increase |
