Comparison

Green Mtn vs Monster Pay

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Green Mtn

Manage your electricity account and track your environmental impact. Get daily green living tips, monitor usage, and earn rewards for sustainable actions. Available for Texas customers.

Highlights
  • Pay bills and view payment history
  • Manage account services (AutoPay, Average Billing)
  • Transfer electricity service
  • Access plan details and customer rights
  • Track electricity usage with interactive graphs
  • Earn badges for environmental impact
  • Link electric vehicle for greater impact
Features
Read full description

Available to Texas customers only. Stay connected to your green lifestyle where you are with the Green Mountain Energy App. With daily green living tips and a host of tools to manage your impact, we make it effortless to live cleaner and greener everyday. * Pay your bill, check your balance, and review billing and payment history. * Manage account services like AutoPay, Average Billing, and Tree Free billing. * Transfer your electricity service to a new address. * Access important plan details like your Electricity Facts Label, Terms of Service and your Rights as a Customer. * Track your usage with interactive, customizable graphs that show trends, projected electricity costs and weather impacts in your area. * Get green add-ons like Green Mountain Driver and support sustainability projects through Green Mountain Energy Sun Club. * Earn badges for helping the planet by greening up your life. * See the differences you’re making by tracking your personal impact for preventing carbon emissions. The longer you stay on your plan, the bigger your impact gets. * Link your electric vehicle to make an even bigger impact.

About

Monster Pay

Manage your laundry with this mobile payment solution. Purchase credits directly within the app to operate washing machines and dryers. View transaction history and machine availability in participating locations.

Highlights
  • In-app credit purchase
  • QR code machine scanning
  • View account balance
  • Transaction history
  • Machine availability view
  • Laundry cycle completion alerts
Features
Read full description

Monster Pay is an iPhone application providing the easiest and smartest complete laundry solution. This app allows you to pay for laundry cycles from your account to communicate with the washer or dryer. Simply use Monster Pay to purchase credit right from the app, then use that credit for your laundry. A full accounting is available to see your transaction purchase history. • Scan the QR code of your laundry room (one time process) • Start laundry machines by scanning QR code on the machine • Check your card/account balance, and add value to your account for laundry. For participating laundry rooms, you can view machine availability as well as receive alerts when your laundry cycle is complete.

Screenshots

Green Mtn4 screens
Monster Pay4 screens

Verdict

The call

The clearest difference is rating: Green Mtn at 4.9 against Monster Pay's 1.7. Green Mtn also leads on update cadence (monthly vs every 16 months) and review sentiment (47% vs 20%). Monster Pay's advantage is iOS requirement (10.0 vs 16.6). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Green Mtn holds the better App Store score, 4.9 against 1.7. That said, the two scores are not equally well evidenced: Green Mtn has 4.7K ratings behind it against 29, so its average is the more settled of the two. Written reviews point the same way: 47% of Green Mtn's written reviews are positive against 20% of Monster Pay's.

UpkeepUpdate frequency

Green Mtn ships an update monthly, Monster Pay every 16 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
Green Mtn versus Monster Pay: the parameters behind the verdict, then further details
ParameterGreen MtnMonster Pay
PriceFreeFree
Rating4.9 (4.7K ratings) — better1.7 (29 ratings)
Positive reviews47.1% of reviews — better20.0% of reviews
Number of ratings4.7K — better29
Update frequencyMonthly — betterEvery 16 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone, iPod — better
Requires iOS16.610.0 — better
Further details — not scored
Size95 MB45 MB
Age rating4+4+
DeveloperGreen Mountain EnergyKioSoft Technologies LLC

Customer experience

Green Mtn

All ratings4,655 ratings
Positive98.5%
Neutral0.6%
Negative0.8%
Written reviews70 reviews
Positive47.1%
Neutral14.3%
Negative38.6%

Monster Pay

All ratings29 ratings
Positive17.2%
Neutral3.4%
Negative79.3%
Written reviews10 reviews
Positive20.0%
Neutral10.0%
Negative70.0%

Bugs and requests

Green Mtn

Reported bugs

4 issues
  • Unable to log in
  • App crashes on launch
  • Payment methods not saving
  • Incorrect account information displayed

Requested features

4 requests
  • Add Apple Pay support
  • Improve app stability and performance
  • Provide more detailed usage and billing information
  • Enhance user interface and navigation

Monster Pay

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Green Mtn

No in-app purchases

None

Monster Pay

No in-app purchases

Questions

Is Green Mtn free?
Green Mtn is free to download, with no in-app purchases.
Is Monster Pay free?
Monster Pay is free to download, with no in-app purchases.
Which has better reviews, Green Mtn or Monster Pay?
Green Mtn is rated higher. Green Mtn averages 4.9 out of 5 from 4.7K ratings, while Monster Pay averages 1.7 from 29 ratings.
Do Green Mtn or Monster Pay have ads?
Neither Green Mtn nor Monster Pay shows ads.
Which is updated more often, Green Mtn or Monster Pay?
Green Mtn ships an update monthly, and Monster Pay every 16 months. Most recently, Green Mtn was updated on October 29, 2026 and Monster Pay on October 24, 2026.

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