The free app that quietly cut my electricity bill by 47%

Every couple of years I go through the same routine. Open the utility bill, wince at the number, spend an hour on whichsupplier.com-type sites comparing plans, sign up for whatever looked cheapest, feel good for six months, and then the "introductory rate" expires and I'm right back where I started. Or worse.

The problem with picking your own electricity supplier isn't that the savings aren't real — they are. The problem is that the good rates keep moving, and remembering to re-shop every 12 months is a chore nobody actually does. Suppliers know this. That's the whole game.

Which is why I skeptically downloaded an app called Arbor a few months back. The pitch is simple: link your utility account, and Arbor watches the market 24/7 and automatically switches you to a lower fixed-rate plan when it finds one. No login required to switch. No paperwork. Same power, same utility, smaller bill.

What actually happens when you download it

The setup took about two minutes on my phone. You create an account, connect your utility (Arbor supports 11 deregulated states — CT, DC, DE, MA, MD, ME, NH, NJ, OH, PA, RI), and it pulls in your current supply rate and usage history. Then it shows you a number.

In my case it said I could save about $208 a year at my current usage. Which sounded aggressive, but the app's math was transparent — it showed me the current rate I was paying, the alternative rate available, and the multiplication. Not marketing math.

The switch itself was the weirdest part

I expected a pile of paperwork or at least a phone call. There was neither. I tapped "switch," Arbor filed the enrollment behind the scenes, and a few weeks later my next bill showed a new supplier line item. The delivery charge and the utility company didn't change. The power flowing to my house didn't change. Just the little number next to "supply."

Here's the part most people don't know: your utility is legally required to keep delivering your power the same way, regardless of which supplier you pick. That's what "deregulated" means — the wires and the meter are still owned by one company, but the electricity itself can be bought from any of dozens of suppliers who compete on price.

Where it actually helps (and where it doesn't)

Two months in, my new supply rate is roughly 4.9¢/kWh versus the utility's standard rate of about 9.3¢/kWh. On my usage that's the 47% headline savings on the supply portion of the bill.

But — and this is where honest reviews matter — the supply portion is only about half your total bill. The other half is delivery/transmission charges you can't shop. So don't expect your full bill to be cut in half. Expect the supply line to drop meaningfully and your bottom-line total to come down 15-25%, depending on how far off the utility standard rate you were.

Which is still real money. Over a year, it's a plane ticket. Over five years, it's a nice appliance. And I did zero work.

The one gotcha to watch for

The one thing I paid attention to: some suppliers offer a teaser rate that jumps 30-40% after 3-6 months. Arbor's algorithm specifically filters those out — it only offers fixed-rate plans that lock the price for a set period (usually 12 months). When that fixed period ends, Arbor is already scanning for the next best rate and will auto-enroll you again.

That's the whole point of the app — automating the "remember to re-shop" step that everyone forgets.

Bottom line

If you live in one of the 11 deregulated states, don't currently have your electricity through a shopped supplier, and would like to stop overpaying without turning it into a project: it's a solid free download. Two minutes of setup, real dollars off the bill, nothing to remember.

If you're already on a shopped rate you locked in recently, you might not save much yet — but the app will still notify you when it's worth switching.