(Updated September 2026) Track Sales Tax Automation by TaxRex's estimated install share within every Shopify App Store group it appears in — categories, keywords, and collections — with current %, 30-day change, and Growing / Stable / Declining status. US State sales tax registration, reports & Automated filing.
Sales Tax Automation by TaxRex's estimated install share within each Shopify App Store group it appears in — categories, keywords, and collections — with current %, status (Growing / Stable / Declining), and 30-day change. Filterable by date range and sortable by share or share change.
| Category/Keyword | Market Share | Status |
|---|---|---|
KeywordReporting and filing | 49.04%0.25 | Declining |
KeywordTax registration | 28.80%14.72 | Declining |
Keywordtaxes | 4.43%27.65 | Declining |
CategoryTaxes Store management > Finances > Taxes | 3.82%0.06 | Declining |
KeywordTax calcluation | 1.95%43.73 | Declining |
KeywordUS (Sales tax) | 1.69%3.53 | Declining |
KeywordExemption managment | 1.50%2.67 | Declining |
CategoryFinances Store management > Finances | 0.83%0.04 | Growing |
KeywordMulti-state filing | 0.81%1.67 | Declining |
KeywordLocal tax returns | 0.81%1.68 | Declining |
Key Insights:
Monthly market share trajectory for Sales Tax Automation by TaxRex across its top 5 Shopify App Store groups over the past year — pick categories or keywords to plot, filter by country, and switch sub-tabs for absolute share or per-interval change.
| Category / Keyword | Apr 2026 | May 2026 | Jun 2026 | Jul 2026 | Aug 2026 | Sep 2026 |
|---|---|---|---|---|---|---|
| Reporting And Filing | — | 49.43% | 47.83%1.6 | 48.78%0.95 | 55.25%6.47 | 53.18%2.07 |
| Tax Registration | — | 53.46% | 42.29%11.17 | 27.92%14.37 | 15.86%12.06 | 19.51%3.65 |
| Taxes | 4.17% | 4.07%0.1 | 3.71%0.36 | 3.70%0.01 | 3.25%0.45 | 4.03%0.78 |
| Taxes | 16.76% | 32.11%15.35 | 31.04%1.07 | 3.87%27.17 | 1.90%1.97 | 2.60%0.7 |
| Us (Sales Tax) | — | 4.46% | 4.95%0.49 | 1.63%3.32 | 0.97%0.66 | 1.75%0.78 |
Key Insights:
Sales Tax Automation by TaxRex captures the largest share of installs in Reporting and filing — 49.0% of the group's tracked install base, followed by 28.8% in Tax registration and 4.4% in taxes. Sort the table by Share to see the full ordered list.
Sales Tax Automation by TaxRex is contracting in more groups than it's expanding. Tax calcluation saw the sharpest dip this month — switch to "Market Share Changes" to see the full distribution and check whether the contractions cluster around a shared theme.
Market share is estimated from each app's review velocity within a group, used as a proxy for install share. For category and collection groups, it's a straight share-of-reviews calculation; for keyword groups, ranking position is weighted (rank #1 ≈ 40× the weight of rank #22, with apps beyond #22 excluded) since search traffic concentrates heavily at the top. The Country filter on the table re-computes share using only that country's reviews.
Sales Tax Automation by TaxRex appears in 18 Shopify App Store groups in total — categories, keywords, and collections combined. The table above lists the top 10 where it captures the largest share; paginate or sort by Change to see the rest.
Share figures are recomputed weekly from the latest review data. Sales Tax Automation by TaxRex is currently losing share in more groups than it's gaining — the trend chart's date range filter lets you check whether the slide started recently or has been ongoing.
Rankings and trends across every Shopify app, category, and keyword.