'Should we use a proper warehouse app for inventory, or run it on Google Sheets?' There is no clear-cut 'right answer' to that question. Store size, the nature of your products, the number of locations you handle, headcount, budget. So many factors are intertwined that what worked for another company does not necessarily work for yours.
In this article, we organize the cases that each of a dedicated warehouse app and Google Sheets 'fits,' the idea of a hybrid approach that uses both, and a checklist to help you decide which suits your store. By the time you finish reading, your current position and the direction to head should be a bit clearer.
When a warehouse app fits
Dedicated software called a warehouse app (WMS: Warehouse Management System) was originally built for logistics floors. They are loaded with features that make on-site work efficient—integration with barcode readers, shelf-location management within a location, optimized inbound/outbound flow lines, and so on. These apps fit cases like the following.
- Product count exceeds several thousand SKUs and a sheet is hard to scan at a glance
- Ten or more warehouse staff working inbound/outbound in parallel
- Inspection using handheld terminals or barcode scanners is required
- Optimizing shelf placement and picking flow lines has become a management challenge
- Shipping simultaneously to multiple sales channels (Shopify, Amazon, Rakuten, wholesale)
If you fit those conditions, a dedicated WMS is plenty cost-effective. The monthly cost in the range of tens of thousands to over a hundred thousand yen is recoverable through reduced labor and fewer shipping errors. On the other hand, trying to run on sheets alone under these conditions puts too much load on the floor.
When sheets are enough
Conversely, there are many stores that can run perfectly well on Google Sheets. In fact, for small- to mid-sized stores, sheets are arguably more realistic in many cases. If you fit the following conditions, starting with sheets is worth a try.
- A few hundred to about 1,000 SKUs
- A small warehouse team (1 to 5 people) operating in a way that depends on individual expertise
- Shipments of tens to a few hundred a day, manageable without handheld scanners
- About 1 to 3 locations
- Budget kept around a few thousand to ten thousand yen per month
The strength of sheets is 'ease of change'
The biggest strength of sheets is that 'you can change the structure to fit your operations at any time.' With a dedicated WMS, you end up having to fit your operations to the software's specs. With sheets, you can add columns, change calculation logic, and create new metrics freely. In industries with idiosyncratic practices (apparel, food, seasonal goods, etc.), that flexibility becomes a major value.
Sheets also have nearly zero learning cost for team members. Even a new hire can learn to read the sheet in a few minutes. Using a sheet-integrated tool like Sync Master, you can manage inventory on the sheet while automating reflection to Shopify, so the 'sheet + sync tool' combination can sometimes build operations comparable to a dedicated WMS.
Hybrid: a third option
You do not have to assume 'we must pick one or the other.' In fact, a hybrid configuration that combines both is often the one that runs best in practice. Here is one combination you might consider.
- 01Manage physical inbound/outbound at the warehouse with the WMS
- 02Manage stock allocation per e-commerce channel, buffer, and sales strategy in Google Sheets
- 03Periodically import WMS inventory into the sheet, and sync the sheet-calculated result to Shopify
The good thing about this configuration is the division of labor: 'floor work is what WMS is good at; strategic decisions are what sheets are good at.' WMS records physical facts accurately; the sheet is where managerial decisions are reflected—a clean separation. A tool like Sync Master finds a natural place inside this hybrid configuration as the bridge between sheet and Shopify.
Decision checklist
Based on the above, here is a checklist to help you decide which configuration suits your store. The number of 'yes' answers will give you a rough indicator.
[Signs you should consider introducing a WMS]
- Multiple shipping errors per month
- Stocktake takes a full day or more
- Warehouse staff are saying 'we can no longer keep up manually'
- Multi-channel concurrent shipping is causing fights over the same inventory
- You have 4 or more locations
[Signs sheets are enough]
- Product count is stable at 1,000 SKUs or fewer
- Shipping errors are a few per year
- Stocktake finishes within half a day
- 1 to 3 locations
- Floor staff are comfortable with Excel/Google Sheets
If 'yes' answers are scattered across both lists, a hybrid configuration is likely a good fit. If they all skew toward 'WMS signs,' it is time to consider a full WMS deployment. If 'sheet signs' dominate, it makes sense in terms of both cost and learning curve to start with a sheet + sync tool like Sync Master.
Wrap-up: choose 'what fits you now' rather than 'the right answer'
The debate of warehouse app vs. Google Sheets is not a binary of 'which is superior.' It is the question of 'which fits my store today.' And the answer changes over time. A store running on sheets today may move to a WMS three years from now—and vice versa.
What matters is to grasp the current state accurately and to change tools flexibly when needed. A sync tool like Sync Master plays its bridging role to Shopify both in the sheet-only phase and in the hybrid phase. Make the best choice for your store today and get the operation running. Half a year from now, you can revisit the options.