Disclosure up front: I build one of the apps in this space, so weigh this accordingly.
To your actual question — yes, that bet is the right one. What most people used Stocky for day to day wasn’t inventory management, it was two things: “what should I buy this week” and “send that to the supplier as a PO”. Native transfers covers the second one awkwardly and doesn’t touch the first at all.
To @akandelism’s point about the moving pieces, here’s what a lightweight version has to get right, from having built one:
Lead time per supplier, not one global setting. A 3-day domestic supplier and a 45-day import need completely different reorder points for the same sales rate. A single lead-time field silently averages you into being wrong on both — you over-order the fast one and stock out on the slow one, and it looks like the forecast is broken when the input was.
Velocity from live orders, not a pasted snapshot. The failure mode with spreadsheets isn’t the maths, it’s that the week nobody refreshes it is the week it’s quietly wrong.
Days of cover, not just a reorder quantity. “14 days left” is something anyone in the business can act on. “Reorder at 47 units” means nothing without knowing how fast 47 goes.
Partial receiving. 100 ordered, 60 arrive. It needs to write 60 into inventory, leave 40 outstanding on the PO, and still show 40 as incoming. This is where most tools fall over and you won’t find it on a pricing page — test it with a real order before you commit.
Mine is Replenora, which is deliberately the narrow version you described: purchase orders with supplier lead times, emailed as PDFs or downloaded, receiving straight into Shopify inventory with a full audit trail, and a replenishment report that turns the last 60 days of orders into days of cover and reorder points, then drafts a PO per supplier from the suggestions. Free for up to 5 open purchase orders, $29/month flat above that. It does not do barcode labels or multi-warehouse planning, so if those were part of your Stocky workflow you’ll want something broader.
One thing worth doing this month regardless of what you choose: export your suppliers and purchase order history to CSV. Stocky goes on the 31st. The tooling decision can wait until September; the data can’t.
App Store: Replenora - Purchase orders, receiving, and reorder points in one place | Shopify App Store
More detail: https://replenora.hjbcodeforge.com