Unit Conversion Shopify Apps – Market Share Breakdown
(Updated September 2026) See which unit conversion Shopify apps dominate installs and how their share has shifted over time. This keyword page shows the full market share table, monthly share trends for the leaders, and a country-level breakdown so you can compare global vs regional dominance.
Unit Conversion Shopify Apps — Full Market Share Table
All tracked unit conversion Shopify apps ranked by current install share, with change vs 30 days ago and Leader / Climbing / Declining / Stable status — filterable by country and date range.
| # | App | Market Share | Change | Status |
|---|---|---|---|---|
| 1 |  Kiwi Size Chart & Recommender | 82.38% | 12.69 | Declining |
| 2 |  MP Size Chart & Size Guide | 11.95% | 11.95 | Climbing |
| 3 |  Jotly Size Chart & Size Guide | 3.25% | 2.10 | Climbing |
| 4 |  Smart Size Chart & Fit Finder | 1.84% | 1.37 | Declining |
| 5 |  Icona: AI Virtual Try On | 0.23% | 0.09 | Climbing |
| 6 |  BF Size Chart & Size Guide | 0.20% | 0.00 | Declining |
| 7 |  ScaleChart: Size Chart & Guide | 0.04% | 0.02 | Climbing |
| 8 |  AI Fit Finder Size Recommender | 0.03% | 0.01 | Climbing |
| 9 |  CSC: Size Chart & Size Guide | 0.03% | 0.05 | Declining |
| 10 |  Bear Specs & Compare | 0.01% | 0.04 | Declining |
Showing 1-10 out of 27
Key Insights:
- Kiwi Size Chart & Recommender holds 82.4% share of unit conversion app installs — 70.4pp ahead of MP Size Chart & Size Guide (11.9%).
- Top 3 apps (Kiwi Size Chart & Recommender, MP Size Chart & Size Guide, Jotly Size Chart & Size Guide) account for 97.6% of all unit conversion install share — a fragmented market.
- MP Size Chart & Size Guide is gaining share fastest this month (+11.95pp) — the largest single gainer among the top unit conversion apps by share.
- Kiwi Size Chart & Recommender is losing share fastest (-12.69pp) — could indicate a churning user base or a stronger challenger gaining ground.
Unit Conversion Shopify Apps — Market Share Over Time
Monthly market share trajectory for the top 5 unit conversion Shopify apps over the past year — see who's gaining or losing install share month by month.
Charts Data
| App | Apr 2026 | May 2026 | Jun 2026 | Jul 2026 | Aug 2026 | Sep 2026 |
|---|---|---|---|---|---|---|
| Kiwi Size Chart & Recommender | — | 50.1% | 95.1%44.97 | 82.7%12.38 | 38.1%44.6 | 35.7%2.39 |
| MP Size Chart & Size Guide | — | 47.3% | 47.3% | 11.8%35.49 | 35.4%23.53 | 33.6%1.75 |
| Jotly Size Chart & Size Guide | — | 0.8% | 1.1%0.38 | 3.1%1.92 | 14.7%11.58 | 16.9%2.24 |
| Smart Size Chart & Fit Finder | — | 1.4% | 3.2%1.79 | 1.8%1.37 | 8.6%6.71 | 9.0%0.46 |
 AI Frame ‑ Try On & Size Chart | — | — | — | 0.0% | 1.5%1.46 | 1.7%0.22 |
Key Insights:
- Kiwi Size Chart & Recommender's share contracted from 50.1% → 35.7% over the charted period.
- Of the top 5 tracked unit conversion apps, 3 grew share and 2 lost share — challengers are eating into leader's share.
Top Unit Conversion Shopify Apps by Country
Per-country market share rankings for unit conversion Shopify apps across 5 markets — see which apps lead in each country and where regional leaders diverge from the global leader.
| # | 🌎 Worldwide |  United States |  India |  China |  United Kingdom |
|---|---|---|---|---|---|
| 1 | | | | | |
| 2 | | | | | |
| 3 | | | | | |
| 4 | | | | | |
| 5 | | | |  | |
Key Insights:
- Kiwi Size Chart & Recommender leads unit conversion apps in all 4 tracked markets — United States, India, China, United Kingdom.
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Top 5 Apps in Unit Conversion
- Jotly Size Chart & Size Guide — Leads unit conversion apps with 16.9% install share, rated 5.0★ — gaining share this month.
- MP Size Chart & Size Guide — Holds 33.6% of unit conversion app install share, rated 5.0★ — gaining share this month.
- Smart Size Chart & Fit Finder — Holds 9.0% of unit conversion app install share, rated 5.0★ — gaining share this month.
- Kiwi Size Chart & Recommender — Holds 35.7% of unit conversion app install share, rated 4.8★ — losing share this month.
- AI Frame ‑ Try On & Size Chart — Holds 1.7% of unit conversion app install share, rated 5.0★ — gaining share this month.
Unit Conversion Shopify Apps — Frequently Asked Questions
1. Which unit conversion app has the highest market share on Shopify?
Kiwi Size Chart & Recommender ranks #1 by share among unit conversion apps at 82.4%, but the market is fragmented — multiple apps capture meaningful share. Compare the top 5 on features and pricing before deciding.
2. How is market share calculated for unit conversion Shopify apps?
For unit conversion (a keyword page), market share is rank-weighted — apps at position #1 carry roughly 40× the weight of apps at position #22, and apps beyond #22 are excluded. Each app's weighted score is divided by the total weighted score across the keyword to give the share %. This reflects Shopify search behaviour: most installs come from the top of the results.
3. Which unit conversion apps are gaining market share on Shopify?
MP Size Chart & Size Guide is gaining unit conversion app market share fastest this month, up +11.95pp versus 30 days ago. Switch the table sub-tab to "Market Share Changes" to see all gainers ordered by movement.
4. Which unit conversion apps are losing market share on Shopify?
Kiwi Size Chart & Recommender has lost the most market share this month among unit conversion apps (-12.69pp). Sort the table by Change (Low to High) to see the full list of decliners.
5. Which countries drive the most unit conversion Shopify app installs?
United States drives the largest share of unit conversion app installs at 26.0%, followed by Netherlands at 12.9% and United Kingdom at 8.7%. Use the country picker on the third card to compare market leaders by country.
6. How many unit conversion apps does ShopDigest track on Shopify?
ShopDigest tracks 96 unit conversion apps on the Shopify App Store. Market share, rankings, and review data refresh weekly so you can track competitive shifts as they happen.
7. Why does the highest-share unit conversion app differ from the #1 ranked app?
Rank reflects an app's current position in the Shopify App Store under unit conversion (driven by Shopify's own algorithm), while market share on ShopDigest is estimated from review counts and other factors as a proxy for active installs. The two metrics move on independent dynamics, so the highest-share app and the #1-ranked app are not always the same — and a divergence between them is worth noting rather than assuming one will pull the other along. For unit conversion, Kiwi Size Chart & Recommender leads on share; see the rankings tab for who currently holds #1 position.
