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Utilities · head to head

Calsense vs Rectangle

Calsense logo

Calsense

Utilities

Central irrigation control and water management for municipalities, schools and universities

From
On request
Rated
-
Full reviewWebsite
Rectangle logo

Rectangle

Utilities

Free open source window snapping for macOS, with a separate paid Rectangle Pro for extra features

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Rectangle has a free tier, so it costs nothing to try first.
  • Each has a real cost: Calsense it is a North American product with a narrow dealer network, so agencies outside the United States have effectively no route to buy or support it.; Rectangle rectangle Pro is a separate app rather than an in-app purchase, so upgrading means installing and managing a second piece of software.
  • They diverge on capability: Calsense covers Flow-based fault shutdown, Rectangle covers Keyboard shortcuts.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Calsense and Rectangle actually diverge.

Attributes where Calsense and Rectangle differ
AttributeCalsenseRectangle
Starting priceOn requestFree
Pricing modelquoteOpen source, no licence fee
Free tierNoYes
PlatformsWeb, iOS, AndroidMac

Identical on both: user rating (Not yet rated), category (Utilities).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Calsense

  • Flow-based fault shutdown
  • ET-based scheduling
  • Two-wire and conventional
  • Central management
  • Water budget reporting
  • Master valve and pump control
  • Weather station integration
  • Mobile field access

Only in Rectangle

  • Keyboard shortcuts
  • Drag to snap
  • Multi-display support
  • Almost full screen
  • Rectangle Pro extras
  • Open source core

What people use each for

The jobs each tool is most often brought in to do.

Calsense

  • A school district needing a broken lateral shut off automatically overnight rather than discovered at the next site visitnot Rectangle
  • A city parks department reporting water use against a drought allocation by sitenot Rectangle
  • A university campus consolidating dozens of legacy controllers under one management interfacenot Rectangle
  • A public agency that would rather capitalise irrigation control than carry a per-controller annual feenot Rectangle

Rectangle

  • A developer who wants source-available window management with no cost and no accountnot Calsense
  • Anyone replacing Magnet who does not want to pay even a small one-time feenot Calsense
  • A user who installs software via Homebrew rather than the Mac App Storenot Calsense
  • A power user who later wants Rectangle Pro extras but does not need them from day onenot Calsense

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Calsense

  • It is a North American product with a narrow dealer network, so agencies outside the United States have effectively no route to buy or support it.
  • Install cost is high relative to commercial irrigation controllers because flow sensing, master valves and proper wiring are part of the design rather than optional extras.
  • The interface and workflows are built for irrigation technicians, not casual users, so a small grounds team without a dedicated irrigation specialist will underuse most of what they paid for.
  • Public sector focus means procurement paperwork, bid specifications and cooperative contract vehicles are part of the process, which lengthens purchase timelines regardless of budget availability.
  • No pricing is published, and the no-subscription claim is conditional on the communication model chosen, so the total cost cannot be established without a specific quote and a careful read of which model applies.

Rectangle

  • Rectangle Pro is a separate app rather than an in-app purchase, so upgrading means installing and managing a second piece of software.
  • It is Mac only, so it offers nothing for a user who also runs Windows and wants one window manager everywhere.
  • It has no official paid support channel, being a community open source project, so issues are handled through GitHub rather than a vendor support desk.
  • Some very old or unusually built third party apps still resist Rectangle window snapping, a limitation shared with most third party window managers on macOS.
  • Because it is not distributed through the Mac App Store, some users have to manually approve accessibility permissions and updates rather than getting silent App Store updates.

Pricing, plan by plan

Calsense

On request
  • CS3000 system$undefined/year
    • Controllers and field hardware quoted per site
    • No annual data or subscription fee on some communication models
    • Some configurations include a 4G modem with ten years of cellular data

Rectangle

Free
  • RectangleFree
    • Free and open source, no account needed
    • Keyboard and drag window snapping
    • Multi-display support
  • Rectangle Pro$9.99/one-time
    • Separate paid app, not an in-app unlock
    • Cursor-following snap areas
    • Per-app window size memory

Which should you pick?

Choose Calsense if

  • You need flow-based fault shutdown.
  • You work on Web, iOS, Android.
  • You also want et-based scheduling.
Calsense review

Choose Rectangle if

  • You need keyboard shortcuts.
  • You want to start without paying.
  • You work on Mac.
  • You also want drag to snap.
Rectangle review

Questions people ask

Is Calsense or Rectangle better?
Neither clearly leads. Calsense starts at On request and Rectangle at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Calsense or Rectangle?
Rectangle has a free tier; the other does not. Paid plans start at On request for Calsense and Free for Rectangle.
Does Calsense or Rectangle run on more platforms?
Calsense runs on Web, iOS, Android. Rectangle runs on Mac.
Can I use Rectangle for free?
Yes. Rectangle has a free tier, so you can try it without paying. Calsense starts at On request.
What is Calsense best used for?
Calsense is most often used for a school district needing a broken lateral shut off automatically overnight rather than discovered at the next site visit, a city parks department reporting water use against a drought allocation by site, a university campus consolidating dozens of legacy controllers under one management interface, a public agency that would rather capitalise irrigation control than carry a per-controller annual fee. Of those, a school district needing a broken lateral shut off automatically overnight rather than discovered at the next site visit and a city parks department reporting water use against a drought allocation by site are not what Rectangle is typically brought in for.
What can Calsense do that Rectangle cannot?
Calsense covers Flow-based fault shutdown, ET-based scheduling, Two-wire and conventional, Central management. Rectangle covers Keyboard shortcuts, Drag to snap, Multi-display support, Almost full screen.

Answered from the vendors’ own pages

Calsense: Is there an annual subscription?

Depending on the communication model selected, some CS3000 configurations carry no annual data or subscription fee, and some include a 4G modem with ten years of cellular data. Confirm which model your quote covers.

Rectangle: Is Rectangle really free?

Yes. The core app is free and open source with no feature gating or trial period.

Calsense: Does it shut off a broken pipe automatically?

Yes. It compares actual to expected flow per station and can isolate the station or shut the mainline, which is the main reason agencies specify it.

Rectangle: What does Rectangle Pro add?

Cursor-following snap areas, per-app window size memory and some additional layouts, sold as a separate one-time purchase app.

Calsense: Who typically buys it?

City parks departments, school districts, universities, military bases and other large public landscapes in North America.

Rectangle: How is it different from Magnet?

Rectangle is free and open source; Magnet is a paid Mac App Store app from the start with no free tier.

Calsense: Does it support two-wire decoders?

Yes, along with conventional wiring and hybrid installations on the same platform.

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