The verdict in three sentences
A custom multi-site inventory app in Toronto costs between EUR 25,000 and 55,000 in 2026, depending on warehouse count, mobile scanning and ERP integration. It tackles the real problem of multi-site distribution: inventory discrepancies and stockouts that cost sales and time. Expect 3 to 5 months of development, a stockout drop of 30 to 50 %, and inventory accuracy that often rises from 85 % to over 98 %.
What the app covers
Managing stock across 4 warehouses in spreadsheets mechanically leads to discrepancies, double entry and invisible stockouts. A dedicated app centralises everything in real time. Breakdown of a typical EUR 38,000 project:
| Module | Function | Budget share | Indicative cost |
|---|---|---|---|
| Master data & multi-site | Products, warehouses, locations | 15 % | EUR 5,700 |
| Mobile barcode scan | Handheld/smartphone app, in/out | 25 % | EUR 9,500 |
| Inter-site transfers | Transfer orders, approval, traceability | 15 % | EUR 5,700 |
| Thresholds & alerts | Min stock, auto reorder, notifications | 15 % | EUR 5,700 |
| Cycle counts | Cyclical counts, variances, adjustments | 12 % | EUR 4,560 |
| ERP/accounting integration | Sales, purchasing, valuation sync | 13 % | EUR 4,940 |
| UAT & training | Field tests, team onboarding | 5 % | EUR 1,900 |
Mobile scanning is the most structural line: it eliminates manual entry errors and keeps inventory accurate on the fly.
Cost by site count and options
Budget climbs with warehouse count, SKU volume and integration depth. 2026 ranges:
| Configuration | Sites | Options | Timeline | Cost |
|---|---|---|---|---|
| Single warehouse | 1 | Scan + alerts | 6-9 weeks | EUR 18,000-25,000 |
| Simple multi-site | 2-4 | Scan, transfers, alerts | 3-4 months | EUR 25,000-40,000 |
| Multi-site + ERP | 4-8 | Everything + ERP integration | 4-5 months | EUR 40,000-55,000 |
| Rugged handhelds | option | Industrial scanners | +2 weeks | +EUR 3,000-8,000 |
| Monthly run | - | Hosting + maintenance | recurring | EUR 350-900/month |
A stockout costs on average 4 to 8 % of revenue on the affected SKUs; halving stockouts pays back fast.
Mini case study
Grace, operations director of a building-materials distributor in Toronto, ran 4 warehouses on Excel. Inventory discrepancies reached 12 % and stockouts cost around EUR 90,000/year in lost sales, plus 20 hours/week of recounts.
She invests EUR 42,000 in a multi-site inventory app with scanning. Stockouts fall by 40 % (EUR 36,000 of recovered sales/year) and discrepancies drop to 2 %. Adding 15 hours/week reclaimed (about EUR 23,000/year), payback is reached in under 9 months.
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FAQ
Do we need special scanners or is a smartphone enough?
An Android smartphone with its camera is enough to start. For intensive warehouse use, a scanner or rugged handheld costs EUR 150 to 600/unit and speeds up scanning.
Does the app connect to our existing ERP?
Yes, via API or scheduled sync: sales, purchasing and valuation stay aligned. ERP integration runs EUR 4,000 to 10,000 depending on how open the system is.
How long to roll out across 4 sites?
Expect 3 to 5 months for a full multi-site solution, field training included. We deploy site by site to limit risk.
What concrete gain on stockouts?
Our clients see stockouts fall by 30 to 50 % thanks to alert thresholds and auto reorder, with inventory accuracy often above 98 %.
Does the app work offline in a poorly-covered warehouse?
Yes, offline mode stores scans locally and syncs on network return, essential in low-coverage storage zones.
Let's scope your project. Share your warehouse count, SKU volume and current ERP: we quote an inventory app between EUR 25,000 and 55,000. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
