Official claim vs public report

Tidy Cats Designed for Litter-Robot vs Free & Clean in LR4

Designed for Litter-Robot has an official exact-SKU compatibility claim; Free & Clean has one accepted owner report and more complete recorded material fields.

Decision rail

Four checks, in order

Passing one check does not override a failure or unknown in the next. This is a compatibility decision, not a popularity ranking.

01Evidence
Separate claim from observation
An official exact-SKU statement establishes maker-declared fit; an owner report records one household outcome.
02Specs
Keep unknown attributes visible
The Designed product’s material and weight remain unfilled where the current source text does not state them.
03Performance
Do not invent a head-to-head result
Neither source compares the two products under the same cats, fill, delay, cleaning, or duration.
04Decision
Choose the evidence question first
Use the official claim for declared compatibility and exact observations for specific performance signals.

Evidence transfer ledger

How far this evidence can travel

A report stays attached to the identity and conditions it actually names. Each unresolved mismatch stops transfer; similarity alone does not fill the missing field.

Evidence origin

Separate Purina's SKU claim from one owner's use

Can support: Official declared fit for Designed and a narrow household outcome for Free & Clean.
Stop transfer when: The official claim is called a PawExact test or the owner comment an official endorsement.

Model scope

Retain all-system use versus LR4-only Perfect Cycle

Can support: The maker's stated product scope and its narrower app-feature scope.
Stop transfer when: Perfect Cycle's LR4 limit is misread as Designed litter being LR4-only.

Specifications

Leave Designed material and weight unresolved

Can support: Clumping and maker-declared fit without invented physical attributes.
Stop transfer when: Bag mass or appearance is used to infer clay, density, or standard-weight status.

Performance fields

Record clump release, dust, tracking, and readings separately

Can support: A future observed-use report tied to one machine and bag.
Stop transfer when: Declared compatibility is converted into measured superiority over Free & Clean.

Report count

Keep zero independent Designed reports and one Free & Clean report

Can support: Two unlike evidence types with explicit sample limits.
Stop transfer when: LR4 and LR5 official coverage is counted as two independent owner trials.

Source continuity review · 2026-10-15

Can the older evidence describe today's bags?

This editorial check joins dated manufacturer-source status to already accepted exact-product records. It is not a new PawExact test, a rereading of old household posts, or proof of formula continuity.

Dated source state: Both linked Purina pages returned 403 locally and from OVH on October 14. The Designed claim remains the earlier captured official statement, not a freshly reread page.
Exact evidence unit: Designed has a maker-declared exact-SKU fit statement and no accepted use report; Free & Clean has one accepted LR4 owner result. These are not the same evidence type.
First comparison: Match the Designed and Free & Clean bags separately, then ask whether the decision needs declared fit or observed clump, dust, and screen behavior.
Stop transfer when: Do not turn declared use with Litter-Robot systems into independent performance data or borrow the Free & Clean account for Designed.

Exact product profileDesigned statement and limits Exact product profileFree & Clean report scope

Published boundary

What Litter-Robot actually says

These statements describe classes and limits. They are not PawExact tests and do not automatically approve every product using the same marketing term.

OfficialLitter-Robot 4

“We recommend a high-quality, standard-weight, clay-based clumping litter”

Official source

OfficialPurina exact-SKU compatibility claim

“Tidy Cats® Designed for Litter-Robot® clumping cat litter is specially made for Litter-Robot®. […] Tidy Cats® Designed for Litter-Robot® can be used with all Litter-Robot® systems.”

Official product source

Exact-product records

Products that show why the class label is not enough

One card carries A-level official fit evidence; the other carries D-level single-report evidence. They answer different questions and must not be collapsed into one score.

OfficialClass rule only

Designed for Litter-Robot Clumping Cat Litter

Purina Tidy Cats

Material: Unknown
Clumping: Clumping
Weight: Unknown

Purina supplies a direct exact-product fit claim, but the recorded official text does not complete material family, weight class, or independent LR4 performance fields.

Likely compatible

Read exact record

Single report1 public report

Free & Clean Unscented Clumping

Purina Tidy Cats

Material: Clay
Clumping: Clumping
Weight: Standard

Recorded as standard-weight clay clumping and supported by one brief positive LR4 report; use duration and detailed outcomes are unknown.

Likely compatible

Read exact record

Before a larger purchase

A small, observable first-use check

This is not a controlled test protocol. It is a way to notice an obvious mismatch before treating one successful cycle as proof.

Check 1Confirm the complete current package, not only the Tidy Cats brand.
Check 2Record whether the evidence is an official statement or an observed-use report.
Check 3Compare clump release, dust, tracking, screen return, and sensor readings separately during a switch.
Check 4Recheck the official product page after a package or formula change.

Known limits

What the current evidence cannot prove

PawExact has no accepted independent exact LR4 report for the Designed product.
The current official excerpt does not complete its material family or weight class.
The single Free & Clean report cannot establish long-term or comparative performance.

Evidence readiness

What this guide can support today

This checkpoint separates a useful answer from claims the current official rules and exact records still cannot support. It is an editorial evidence review, not a PawExact test.

Question scope: This page compares evidence types for Designed for Litter-Robot and standard Free & Clean in LR4. It is not a performance contest and must not transfer either product's evidence to the lightweight bag.
Direct official boundary: Purina directly says the Designed SKU can be used with Litter-Robot systems; LR4 separately prefers standard-weight clay clumping. The available official excerpt does not complete the Designed SKU's material or weight fields.
Exact-product evidence: Designed has an official exact-SKU fit claim but no accepted independent LR4 use report. Standard Free & Clean has one accepted brief owner report; these are different evidence types, not two observed performance samples.
Remaining gap: The official claim lacks independent cycling, tracking, and duration observations; the owner report lacks detailed setup. This educational contrast overlaps both product pages and other Tidy Cats comparisons.