Quick verdict: FlexSync is a focused inventory tool - two-way stock sync between Shopify and Google Sheets with real-time updates, multi-location support, and a genuinely useful free plan (up to 1,000 SKUs). Its limits are structural: plans cap how many SKUs you can sync and even how many formula cells you can use, and it doesn't touch orders, customers, or analytics. eCommix covers inventory the same two-way way, then keeps going: order export and fulfillment from the sheet, customer data, refunds, abandoned checkouts, ShopifyQL reporting, and no caps on your spreadsheet formulas - they're just normal Google Sheets formulas. For pure stock-level syncing on a small catalog, FlexSync's free plan is hard to beat. For running store operations from a spreadsheet, eCommix is the more complete tool.
At a glance
| eCommix - Google Sheets Sync | FlexSync: Stock Sync for Sheet | |
|---|---|---|
| Primary job | Full Shopify ↔ Google Sheets sync: export, bulk edit, write back | Two-way inventory/stock sync with Google Sheets |
| Data covered | Products, variants, inventory, orders, customers, refunds, abandoned checkouts, images, metafields, ShopifyQL | Inventory quantities, products, prices, variants, SKUs, barcodes, tags, metafields |
| Orders | Export, real-time export, and update (tags, notes, tracking, auto-fulfillment) | Not covered |
| Two-way sync | Yes, with side-by-side diff preview before writing | Yes, real-time when Auto Sync is enabled |
| Formula usage | Unlimited - standard Google Sheets formulas, preserved on every refresh | Capped per plan: 100 formula cells free, up to 5,000 on Ultimate |
| Catalog limits | Row-based: 1,000 (Bronze) / 5,000 (Silver) / unlimited (Gold) | SKU-based: 1,000 free / 5,000 / 15,000 / 50,000 max |
| Analytics | ShopifyQL queries to Sheets | Not offered |
| Pricing | Free plan; paid $14.99-$59.99/month, 7-day trial | Free; paid $9-$49/month, 14-day trial |
| Shopify App Store rating (July 2026) | 4.9★ (21 reviews) | 4.6★ (13 reviews) |
| Launched | March 2024 | July 2024 |
What FlexSync does well
FlexSync keeps its scope tight and executes it well: connect a sheet, filter down to the products or categories you want, and stock levels stay in sync both directions in real time. Multi-location inventory is supported, bulk updates work with ordinary copy-paste and fill-down, and its formula feature can automate restock quantities or price rules inside the sheet. The free plan covers 1,000 SKUs, which makes it a low-risk choice for a small catalog, and paid plans start at just $9/month. It's also localized into seven languages.
The limits to know about: plans are capped by SKU count (50,000 even on the top plan) and by "formula cells" - the free plan allows 100 cells of formula automation, the $49/month Ultimate plan 5,000. And FlexSync is inventory-and-product territory only; orders, customers, and reporting are out of scope.
Where eCommix goes further
- Orders in the same workflow. Inventory rarely lives alone. eCommix exports orders (in real time on Silver+), and your team can update tags, notes, and tracking numbers from the sheet - pasting tracking codes auto-fulfills orders and notifies customers. Restock planning and order operations happen in one place.
- No formula accounting. eCommix syncs data into a normal Google Sheet and preserves whatever you build on it - formulas, pivot tables, conditional formatting, frozen panes. There's no concept of a formula-cell quota, because the spreadsheet layer is simply Google Sheets.
- Whole-store coverage. Customers, refunds, abandoned checkouts, product images, and metafields are all exportable, and you can create or delete products, variants, images, and customers from the sheet - with a confirmation step on deletes.
- A diff before every write. Before any change reaches Shopify, eCommix shows old and new values side by side - important when a fill-down just touched a thousand rows.
- Reporting built in. ShopifyQL queries export straight to Sheets, and scheduled refreshes (hourly, or every 10 minutes on Gold) keep inventory dashboards current without manual pulls.
- Truly unlimited top tier. Gold removes row limits entirely - relevant for catalogs past FlexSync's 50,000-SKU ceiling.
Pricing compared
| Plan level | eCommix | FlexSync |
|---|---|---|
| Free | Free plan available | Free - 1,000 SKUs, 100 formula cells |
| Entry | Bronze - $14.99/month: 1,000 one-way rows, 200 two-way rows, hourly refresh | Starter - $9/month: 5,000 SKUs, 500 formula cells |
| Mid | Silver - $39.99/month: 5,000 rows, real-time sync, ShopifyQL | Growth - $19/month: 15,000 SKUs, 1,000 formula cells |
| Top | Gold - $59.99/month: unlimited rows, 10-minute refresh | Ultimate - $49/month: 50,000 SKUs, 5,000 formula cells |
FlexSync is cheaper tier for tier if stock sync is your entire requirement. eCommix's plans buy the order workflows, analytics, and whole-store coverage on top - full details on our pricing page.
Which should you choose?
- Choose FlexSync if you need exactly one thing - stock levels synced both ways with Google Sheets - your catalog fits inside 50,000 SKUs, and its formula-cell allowances cover your automation.
- Choose eCommix if inventory is one part of a bigger spreadsheet workflow: order fulfillment, bulk price edits with a preview, customer exports, metafields, or scheduled reports. Start with the inventory quantities tutorial.
Related reading: our best Shopify Google Sheets apps roundup, and comparisons against SyncWith and Sheets - Data Connector.
FAQ
Can FlexSync export or update Shopify orders?
No. FlexSync's scope is inventory and product data - stock levels, prices, variants, SKUs, barcodes, tags, and metafields. Order export, real-time order feeds, and fulfillment updates from the sheet require a broader tool like eCommix.
What are FlexSync's formula-cell limits, and does eCommix have them?
FlexSync caps its formula automation feature by plan: 100 cells on the free plan, 500 on Starter, 1,000 on Growth, and 5,000 on Ultimate. eCommix has no formula limits because your data lives in a standard Google Sheet - any formula, pivot table, or ARRAYFORMULA works, and everything is preserved across syncs.
Which app handles multi-location inventory?
Both. FlexSync advertises multi-location inventory management, and eCommix exports and updates inventory quantities per location as part of its inventory sync.
Is FlexSync's free plan better than eCommix's?
For pure stock syncing on a catalog under 1,000 SKUs, FlexSync's free plan is more generous in that niche. eCommix's free plan and 7-day paid trial make more sense when you want to test order exports, two-way product editing, or reporting alongside inventory.
