Appointment Booking Cowlendar vs RentalFlow ‑ Product Rentals
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 9, 2026 for Appointment Booking Cowlendar, Nov 2, 2026 for RentalFlow.
The short answer
- Only Appointment Booking Cowlendar lists a free plan. Paid plans start at $13.99/month for Appointment Booking Cowlendar and $39/month for RentalFlow.
- Appointment Booking Cowlendar lists 41 features RentalFlow’s listing doesn’t mention, including Appointments, Block dates, Booking pages.
Head to head
Bookings & appointments | Schedule | Zoom | Meet | Calendar
- United States
- United Kingdom
- Canada
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
- · 5 bookings/mo, great to test the waters
- · Unlimited features
Starter
- · 1-1 booking • group booking • multiday
- · ALL FEATURES, INCLUDING :
- · Booking limit per timeslot / per day
- · Custom duration / Deposit / Prepayment
- · Full day booking • bundle • subscription
- · Google/Outlook/Zoom/Teams
Basic
- · 1 to1 booking • group booking • multiday
- · ALL FEATURES, INCLUDING :
- · Booking limit per timeslot / per day
- · Custom duration / Deposit / Prepayment
- · Full day booking • bundle • subscription
- · Google/Outlook/Zoom/Teams
Growth
- · 1-1 booking • group booking • multiday
- · ALL FEATURES, INCLUDING :
- · Booking limit per timeslot / per day
- · Custom duration / Deposit / Prepayment
- · Full day booking • bundle • subscription
- · Google/Outlook/Zoom/Teams
RentalFlow Pro
- · Calendar sync (Google/Apple/Outlook)
- · Delivery and return confirmation flow
- · Mobile-responsive dashboard
- · No separate booking app needed
- · Own stock count, Shopify stock unchanged
- · Prevents double-booking automatically
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureThis booking app adds a native scheduling popup on any service/product you sell on Shopify. Our booking app requires zero technical knowledge. Transform a product into a bookable service in 3 min. Works like Calendly, but integrated into Shopify. One time or subscription bookings. Use an address or a digital location (zoom, google meet link, outlook) for your bookings. Addquestions to the form to gather info.
Most rental businesses use separate apps for booking, delivery scheduling, inventory tracking, and calendar management. RentalFlow combines all four into one tool. Customers select delivery and pickup dates on your product pages. RentalFlow keeps its own count of what you own, so your Shopify stock never changes. Manage deliveries and returns from your phone. Syncs with Google, Apple, and Outlook calendars.
- Replace the "add to cart" button for a "book now" button on any product page
- Setup in-person meeting or virtual bookings through Zoom or Google Meet
- Email notifications & Reminders for appointments and bookings. Booking app.
- Group booking: you can allow multiple customers to book the same timeslot.
- Date-range inventory tracking prevents double-booking across all rental periods
- Delivery and return confirmation with automatic Shopify inventory sync
- Calendar feed integration for Google Calendar Apple Calendar and Outlook
- Dual address collection with zip code service area validation
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Appointment Booking Cowlendar |  RentalFlow |
|---|---|---|
| Detected stores | 5,475 | Not published |
| Net store change, 28 days | −5 | 0 |
| Stores added, 28 days | 112 | Not enough data |
| Big-brand share | 8% | Not enough data |
| Top store categories | Apparel & Accessories, Services, Home & Garden | Not published |
| Top store countries | United States, United Kingdom, Canada | Not published |
Reviews
| Measure | Appointment Booking Cowlendar | RentalFlow |
|---|---|---|
| App Store rating | 4.9 ★ | Not published |
| App Store reviews | 2,261 | Not published |
| New reviews, 28 days | 17 | Not enough data |
| Reviewers a year or more in | 11% | Not enough data |
Pricing
| Measure | Appointment Booking Cowlendar | RentalFlow |
|---|---|---|
| Free plan | Yes | Not listed |
| Lowest paid monthly plan | $13.99/month(ahead) | $39/month |
| Longest free trial | 7 days | 14 days |
| Plans listed | 4 | 1 |
Listing
| Measure | Appointment Booking Cowlendar | RentalFlow |
|---|---|---|
| Shopify category rank | #3(ahead) | #83 |
| Shopify App Charts | #1 in Event booking | Not on this week’s charts |
| Built for Shopify | Yes | No |
| Launched | Jan 21, 2022 | Mar 6, 2026 |
| Languages | 6 | 1 |
| Developer | Booking Appointment Cowlendar | James Builds |
FAQ
Appointment Booking Cowlendar and RentalFlow: common questions
- Is Appointment Booking Cowlendar or RentalFlow cheaper?
- Only Appointment Booking Cowlendar lists a free plan. Paid plans start at $13.99/month for Appointment Booking Cowlendar and $39/month for RentalFlow. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- Appointment Booking Cowlendar lists 41 the others don’t mention, such as Appointments, Block dates, Booking pages, Branding. RentalFlow lists 3 the others don’t mention, such as Dashboards, Order lookup page, Real-time tracking. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 9, 2026 for Appointment Booking Cowlendar, Nov 2, 2026 for RentalFlow; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 9, 2026 for Appointment Booking Cowlendar, Nov 2, 2026 for RentalFlow. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.