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 |  MP Size Chart & Size Guide | 42.96% | 9.97 | Climbing |
| 2 |  Kiwi Size Chart & Recommender | 29.67% | 7.24 | Declining |
| 3 |  Jotly Size Chart & Size Guide | 9.81% | 6.34 | Declining |
| 4 |  Smart Size Chart & Size Guide | 9.08% | 0.20 | Climbing |
| 5 |  AI Frame: Size Chart & Try On | 4.54% | 2.69 | Climbing |
| 6 |  ScaleChart: Size Chart & Guide | 1.90% | 0.37 | Climbing |
| 7 |  Icona: AI Virtual Try On | 1.34% | 0.01 | Climbing |
| 8 |  AI Fit Finder Size Recommender | 0.27% | 0.19 | Climbing |
| 9 |  PDF to Order by LevelOps | 0.19% | 0.19 | Climbing |
| 10 |  BF Size Chart & Size Guide | 0.07% | 0.07 | Declining |
Showing 1-10 out of 25
Key Insights:
- MP Size Chart & Size Guide holds 43.0% share of unit conversion app installs — 13.3pp ahead of Kiwi Size Chart & Recommender (29.7%).
- Top 3 apps (MP Size Chart & Size Guide, Kiwi Size Chart & Recommender, Jotly Size Chart & Size Guide) account for 82.4% of all unit conversion install share — a concentrated market.
- MP Size Chart & Size Guide is gaining share fastest this month (+9.97pp) — the largest single gainer among the top unit conversion apps by share.
- Kiwi Size Chart & Recommender is losing share fastest (-7.24pp) — 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 | May 2026 | Jun 2026 | Jul 2026 | Aug 2026 | Sep 2026 | Oct 2026 |
|---|---|---|---|---|---|---|
| MP Size Chart & Size Guide | 48.1% | 48.1%– | 11.6%36.58 | 34.5%22.98 | 31.7%2.83 | 42.3%10.60 |
| Kiwi Size Chart & Recommender | 49.4% | 95.2%45.79 | 83.2%11.94 | 39.3%43.95 | 39.2%0.10 | 30.0%9.18 |
| Jotly Size Chart & Size Guide | 0.8% | 1.1%0.30 | 2.9%1.75 | 14.3%11.46 | 15.8%1.48 | 10.0%5.75 |
| Smart Size Chart & Size Guide | 1.3% | 3.2%1.86 | 1.8%1.36 | 8.3%6.54 | 9.1%0.77 | 9.0%0.12 |
| AI Frame: Size Chart & Try On | — | — | 0.0% | 1.7%1.66 | 1.1%0.60 | 4.7%3.58 |
Key Insights:
- MP Size Chart & Size Guide's share contracted from 48.1% → 42.3% 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 | MP Size Chart & Size Guide | MP Size Chart & Size Guide | Kiwi Size Chart & Recommender | Kiwi Size Chart & Recommender | Jotly Size Chart & Size Guide |
| 2 | Kiwi Size Chart & Recommender | Kiwi Size Chart & Recommender | Smart Size Chart & Size Guide | MP Size Chart & Size Guide | MP Size Chart & Size Guide |
| 3 | Jotly Size Chart & Size Guide | Jotly Size Chart & Size Guide | MP Size Chart & Size Guide | Jotly Size Chart & Size Guide | Kiwi Size Chart & Recommender |
| 4 | Smart Size Chart & Size Guide | Smart Size Chart & Size Guide | Jotly Size Chart & Size Guide | Smart Size Chart & Size Guide | Smart Size Chart & Size Guide |
| 5 | AI Frame: Size Chart & Try On | AI Frame: Size Chart & Try On | Icona: AI Virtual Try On | AI Frame: Size Chart & Try On | AI Frame: Size Chart & Try On |
Key Insights:
- Kiwi Size Chart & Recommender leads unit conversion apps in 2 of 4 tracked markets (India, China).
- MP Size Chart & Size Guide leads worldwide, but 3 of 4 tracked markets crown a different leader — Kiwi Size Chart & Recommender in India, Kiwi Size Chart & Recommender in China, and others.
Top 5 Apps in Unit Conversion
- MP Size Chart & Size Guide — Leads unit conversion apps with 42.3% install share, rated 5.0★ — gaining share this month.
- Jotly Size Chart & Size Guide — Holds 10.0% of unit conversion app install share, rated 5.0★ — losing share this month.
- Smart Size Chart & Size Guide — Holds 9.0% of unit conversion app install share, rated 4.9★ — gaining share this month.
- AI Frame: Size Chart & Try On — Holds 4.6% of unit conversion app install share, rated 5.0★ — gaining share this month.
- Kiwi Size Chart & Recommender — Holds 30.0% of unit conversion app install share, rated 4.7★ — losing share this month.
Unit Conversion Shopify Apps — Frequently Asked Questions
1. Which unit conversion app has the highest market share on Shopify?
MP Size Chart & Size Guide dominates the unit conversion category on Shopify with 43.0% of installs — 13.3pp ahead of Kiwi Size Chart & Recommender. This is a clear leader by share, so most merchants default to it unless they have a niche-fit reason to pick differently.
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 +9.97pp 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 (-7.24pp). 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 29.1%, followed by Netherlands at 14.8% and United Kingdom at 6.4%. 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.
