Size Charts Shopify Apps – Analytics & Insights

Pify Size Charts & Size Guides ranks #1 for size charts with 9.5% share — the leader position in a fragmented field where many apps are within striking distance, -12.1pp ahead of MP Size Chart & Size Guide (21.6%). Kiwi Size Chart & Recommender sits at #3 with 51.7% share, rounding out the top tier. Together, the top 3 apps absorb 82.9% of all size charts installs — a highly concentrated landscape with limited room for new entrants. Goodchart Size Chart & Guide is the standout mover this month, climbing 2 positions — a momentum signal worth tracking. Worth noting: the top-ranked app and the highest-share app aren't the same here — App Store rank and our market share metric (computed from review counts and other factors) move on independent dynamics, so cross-checking both views matters in this category.

Size Charts is a fragmented market — the top 3 apps together hold only 82.9% of installs, leaving Pify Size Charts & Size Guides's 9.5% lead modest in absolute terms and Kiwi Size Chart & Recommender at 51.7% still capturing meaningful share. With this many viable apps, pricing model and integration depth differentiate size charts options more than rank does.

Pify Size Charts & Size Guides climbed from #3 (May 2026) to #1 (Oct 2026) — a 2-position gain among size charts apps over the charted window. Across the top 5 plotted size charts apps, 2 lost rank positions while only 1 improved — consolidation at the top. Pify Size Charts & Size Guides's share expanded +7.4pp from 2.1% (May 2026) to 9.5% (Oct 2026) — a sustained widening of the gap against other size charts apps over this window.

A 2-position move for the leader over the charted size charts window is large enough to reflect real merchant adoption shifts, not just App Store noise — Pify Size Charts & Size Guides's climb as of Oct 2026 is the strongest trajectory signal in this chart.

United States is the largest single market for size charts apps at 22.8% — but no country dominates, meaning size charts apps serve a globally distributed merchant base. Netherlands follows at 16.2%, with India at 6.3%. Together, the top 3 markets account for 45.3% of size charts app installs worldwide. Australia (5.9%) and United Kingdom (5.9%) round out the top 5. Netherlands is the fastest-growing market this month (+2.4pp), pointing to accelerating demand outside the established leaders.

With United States's 22.8% as the largest single market and the rest spread across many countries, the leading size charts apps tend to be region-agnostic by design — geography matters less for app choice here than features, pricing, and support quality.

Kiwi Size Chart & Recommender is the only app in this set to have crossed 1,000 reviews, reaching the milestone in 90 months since launch. The remaining 4 size charts apps tracked here are still building toward 1,000 — current cumulative review counts give the clearest picture of where each one stands today.

4 apps on this chart haven't yet crossed 1,000 reviews: MP Size Chart & Size Guide at 870, Smart Size Chart & Size Guide at 143, Jotly Size Chart & Size Guide at 74, Pify Size Charts & Size Guides at 39 cumulative reviews. MP Size Chart & Size Guide is closest to the milestone — its current count puts it roughly 87% of the way to 1,000.

Kiwi Size Chart & Recommender is the only app in this set to have crossed 1,000 reviews so far — a useful signal for merchants that one app has already proved sustained adoption while the others remain in the "promising but unproven" tier of the size charts category.