The problem
My brother was starting a Shopify store renting out moving equipment: boxes, containers, that kind of thing. Shopify is built for selling products, not lending them, and he had no simple way to track rental inventory, bookings, and returns inside the admin he already used.
About
RentalFlow adds rental inventory, bookings, and availability to the Shopify admin. It was built for businesses that already use Shopify and do not want a separate system for rentals.
How it works
Install the app
Add RentalFlow to your store from the Shopify App Store.
Set up your rentals
Mark products as rentable, set pricing periods, and configure availability rules.
Manage bookings
Track active rentals, upcoming returns, and inventory availability from one dashboard.
Key decisions
Build for one real customer, then list it
I built RentalFlow for my brother's store first, with his workflow as the starting point. Once it worked for him, I listed it on the Shopify App Store to see whether other rental businesses had the same problem. It was a low-cost way to test demand before investing more time.
What went wrong
The Shopify App Store review took three to four weeks. After shipping seven apps through Apple's review, I had expected the process to feel familiar. Instead, I learned how much the review timeline and requirements can vary by platform.
Seven stores have installed it. One started a paid plan, then cancelled with the feedback "not the correct app for my store." That was disappointing, but it also exposed a gap between the listing and the workflows the app actually supports. I still check usage every day, but it remains a low-priority bet unless demand gives me a reason to change that.
Results
- 7 installs
- from the Shopify App Store listing with no marketing. Enough interest to keep it available, but not enough to make it a current priority.