World's Best Cat Litter is the strongest all-around pick in this comparison for eco-conscious owners who want flushable litter.
A crystal litter built around health monitoring and light weight, with a strong subscription convenience angle and weaker clumping value.
Flushable, lightweight, and eco-friendly corn litter with surprisingly strong clumping for a natural option.
World's Best flushes and clumps. PrettyLitter does neither. Its pull is the color change that can flag a health problem early. That warning often arrives before your cat shows you anything is wrong.
This comparison page is maintained by the ReviewCatLitter editorial team and grounded in the same scoring framework used across the published review catalog.
Choose between them on texture, clumping, dust and price. Then, if the room still tells you where the box is, Purrify is activated carbon you mix into whichever bag you chose. It is what we use in our own homes.
Read our Purrify guide to picking a litter for odor control.
Every figure below is a reading from our own test runs, not a rating. Where a run never took a reading it says so.
| Reading | PrettyLitter | World's Best Cat Litter | Gap |
|---|---|---|---|
| Dust weighed per pourDust caught on a filter and weighed while the bag goes into the box. Lower is better. | not measured | 0.15 mg | only one side measured |
| Clumps that survived the drop testShare of clumps still whole after a three-foot drop. Higher is better. | not measured | 76% | only one side measured |
| Ammonia after one dayParts per million above the tray, 24 hours in. Lower is better. | not measured | 2 ppm | only one side measured |
| Bag priceWhat the tested bag cost. Bag sizes differ, so read it next to cost per pound. | $24.00 | $29.99 | $5.99 |
| Cost per poundBag price divided by what is in the bag. Lower is better. | $4.00 | $1.07better | $2.93 |
| Cost per dayWhat the box costs to keep running each day. Lower is better. | $0.80 | $0.58better | $0.22 |
| Cost across a yearThat daily cost carried over a full year of use. Lower is better. | $292 | $212better | $80 |
Neither run recorded granules outside the box and ammonia after three days, so those rows are left out rather than filled in from a similar bag. The full test data shows every reading we have.
Primary tradeoff: World's Best Cat Litter's weakest area here is value.
Clumping is a real edge: excellent for corn.
It is also the cheapest daily option at $0.58 per day.
Scroll sideways to see every litter. Scores are editorial judgments out of 10.
| Product | ||
|---|---|---|
| Overall Score | 8.8Very good | 9.1Excellent |
| Pricing | ||
| Price | $24.00 | $29.99 |
| Weight | 6 lbs | 28 lbs |
| Cost / Day | $0.80 | $0.58 |
| Performance | ||
| Dust Control | 8.6 Very low crystal dust | 7.8 0.15mg per pour |
| Clumping | 4.2 Non-clumping | 9 Excellent for corn |
| Odor Control | 8.9 Very good urine odor control | 8.2 Good with daily scooping |
| Tracking Outside the Box | 9.1 Minimal | 9 Minimal |
| Value for Cost | 6.8 $0.80/day · $24.00 | 7.2 $0.58/day · $29.99 |
| Features | ||
| Type | Silica Crystal | Corn Litter |
| Flushable | ||
| Scented | No | No |
| Our Verdict | ||
| Best For | Health monitoring and lightweight convenience | Eco-conscious owners who want flushable litter |
| Read ReviewCheck Price | Read ReviewCheck Price | |
PrettyLitter makes the most sense for health monitoring and lightweight convenience.
You care more about health signals and easy lifting than classic clumping performance.
You want traditional scoopable clumps or the best value per pound.
World's Best Cat Litter makes the most sense for eco-conscious owners who want flushable litter.
You want eco-friendly and flushable litter with very good daily usability.
You're on a tight budget or want the absolute lowest dust numbers.
The nearest options to this matchup on score and on price.
Weighed 0.11mg per pour and runs at $0.63 a day.
Weighed 0.04mg per pour and runs at $0.55 a day.
Weighed 0.15mg per pour and runs at $0.72 a day.
World's Best Cat Litter comes out ahead on the balance of dust, clumping, odor control, tracking and daily cost. PrettyLitter is still the one to buy for health monitoring and lightweight convenience.
World's Best Cat Litter runs at $0.58 a day against $0.80 for PrettyLitter.
PrettyLitter scored higher: very good urine odor control, against good with daily scooping for World's Best Cat Litter.
PrettyLitter keeps more litter in the box: minimal, against minimal for World's Best Cat Litter.
Ultra is scoopable clay. PrettyLitter is crystals that change color to flag a health problem.
Ultra is the cleaner and cheaper daily litter. World's Best is the one to pick if you want to flush the waste and stop hauling heavy bags.
Clump & Seal is the cheap perfumed clay. World's Best is the flushable corn litter with no added scent.
Clump & Seal covers smell with fragrance and clumps for far less money. PrettyLitter is unscented crystals that keep an eye on your cat's urine instead.
World's Best is the corn litter most people start with. Sustainably Yours is the one that clumps harder and keeps more litter inside the tray.
Corn against walnut. World's Best flushes and barely leaves the tray. Naturally Fresh held more clumps together in our drop test and costs less per day.