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PDP-013Product page · decisionLow

Quantity selector present and easy to use (tap-friendly on mobile)

Quantity selector is present and tap-friendly on mobile.

Check my store for this rule →Cite this
Free · no card · runs all rules at once · judged on 36 stores · updated
69%of the audited stores we could judge fail this rule
0 pass11 partial25 failPublished audits · September 2026
Stores judged
36
of 40 published audits
Score weight
0.4pts
of the 100-point score
Page share
30%
of the score is the product page

What earns each verdict

Same outcomes on every UXFix rule · how verdicts work
✓ Pass0

Quantity selector present with tap targets ≥44px.

~ Partial11

Selector present but tiny on mobile.

✕ Fail25

No quantity selector, or selector below tap-target minimum.

not assessable is recorded when the rule applied but the store could not be judged on it (bot protection, a region lock, a step we could not reach), and not applicable when the store has nothing for the rule to judge. Those stores are left out of every number on this page, never guessed. Why we do that
Why it matters

The quantity selector on this product page is either missing on mobile, or too small to tap comfortably.

Fat-finger errors turn quick purchases into frustrating ones. Apple's tap-target guideline is 44px minimum; anything smaller mistaps often on real thumbs.

That sentence is the one a failing store sees in its own UXFix report.How rules are weighted and scored →
36 audited stores, one dot each
25 fail
PassPartialFail

Every published UXFix audit this rule could be judged on, as of 23 Sep 2026. A count of real stores, not a simulation of yours.

How we test it

Scripted walk, fresh signed-out browser · the full walk
  1. 1Fresh browserSigned out, cookies cleared, desktop and mobile viewports, the store's live theme.
  2. 2Open a productA real, in-stock product page, found the way a shopper finds one.
  3. 3Judge this ruleAgainst the standard above, on what a shopper can see.
  4. 4Record the verdictPass, partial or fail, saved with the screenshot it was judged on.
What the agent looks for
Quantity selector is present and tap-friendly on mobile.
Confidence
The rulebook rates this check’s confidence High. When the agent is not sure, the rule is recorded as not assessable rather than guessed.
Not judged
4 of 40 published audits: the rule did not apply or could not be judged. Dropped, never guessed.

The numbers behind the rule

Published UXFix audits · more statistics
Published audits failing this rule
and 13 more, newest audit first.
Where this rule sits among 103 UX rules
Most-failed rank
#21
Score weight rank
#98
Fail rate
69%

Score weight: a fail costs 0.4 pts of of the 100-point score; a partial costs half that. Most-failed rank is among the 79 rules with enough published audits to report a rate.

The issue, on real stores

from each store's own published audit

9 of the stores that fail this rule, each shown on the screen it was judged on, with the problem area marked. The picture is the store's own capture on the date shown, and stores change.

16 more are in the list above, each with its own audit.

The fix

The same steps a failing store sees in its report

A pass means: Quantity selector present with tap targets ≥44px.

Severity
Low
Score gain
+0.4pts
Page
Product page

Score gain is roughly what a fail-to-pass change adds; rules that could not be judged are left out, which can move it a little. Re-run a free audit after the change ships to confirm the verdict moved.

Checklist for the pass
0 of 3

Tick each step as you ship it. The audit judges the live store, so re-run it once all of them are done.

Every store that fails this rule

The 25 audited stores that fail Quantity selector present and easy to use (tap-friendly on mobile), with each store's published score and the day it was audited.
#StoreScoreAuditedPublished audit
1Ooniooni.com64Open audit
2Barnesandnoblebarnesandnoble.com61Open audit
3Blackstoneproductsblackstoneproducts.com60Open audit
4Tupperwaretupperware.com60Open audit
5Caspercasper.com62Open audit
6Thebrickthebrick.com61Open audit
7Lavernelaverne.com60Open audit
8Benettonbenetton.com58Open audit
9Keenfootwearkeenfootwear.com56Open audit
10Verabradleyverabradley.com58Open audit
11Tomstoms.com52Open audit
12Bodenboden.com64Open audit
13Gymsharkgymshark.com57Open audit
14Reebokreebok.com58Open audit
15Reebokreebok.com57Open audit
16Fashionnovafashionnova.com56Open audit
17Kathmandukathmandu.com.au63Open audit
18Toysrustoysrus.com57Open audit
19Brewdogbrewdog.com56Open audit
20Zulilyzulily.com61Open audit
21Mejurimejuri.com65Open audit
22Timextimex.com54Open audit
23Enviafloresparadifuntosenviafloresparadifuntos.com56Open audit
24Iliabeautyiliabeauty.com62Open audit
25Tentreetentree.com58Open audit

What our auditors say about this rule

Buying two of something should not need a magnifying glass.
Abdulhameid Grandoka, Co-founder, UXFix

Written by the person who audits this rule, and reviewed every quarter.

What this rule rests on

The published research and standards this rule is drawn from. Open them and check the reasoning for yourself.

Keep going

All rules →
RulePDP-002
Add-to-cart CTA above the fold on mobileProduct page · High ›
RulePDP-003
Sticky add-to-cart on long product pagesProduct page · Medium ›
RulePDP-004
Shipping cost or estimate discoverable from PDPProduct page · Critical ›
RulePDP-005
Delivery/arrival date estimate shownProduct page · High ›
RulePDP-006
Stock/availability state explicit (in stock, low stock, out of stock)Product page · High ›
RulePDP-009
Selected variant state unambiguous (visual + text confirmation)Product page · Medium ›
RulePDP-011
Product title includes brand + descriptive attributes (not SKU-only)Product page · Low ›
RulePDP-015
Image zoom available on desktop and mobileProduct page · Medium ›
Cite this

«25 of 36 online stores audited by UXFix fail the rule "Quantity selector present and easy to use (tap-friendly on mobile)" (PDP-013) as of September 2026. UXFix, uxfix.ai/audits/rules/quantity-selector-on-mobile»

Rule record · JSON
Dataset →
{
  "id": "PDP-013",
  "name": "Quantity selector present and easy to use (tap-friendly on mobile)",
  "area": "pdp",
  "severity": "low",
  "weight": 0.361,
  "published_audits": {
    "judged": 36,
    "pass": 0,
    "partial": 11,
    "fail": 25
  },
  "updated": "2026-09-23"
}
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