Comparison

Sentry Mobile vs Red E Charge

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

Head to head
About

Sentry Mobile

This app allows you to pay for parking meters in real-time directly from your smartphone. View nearby meters, check space availability, and receive alerts when your parking time is about to expire. It also features a "Where's my car" function and an optional auto-pay program.

Highlights
  • Real-time parking meter interaction
  • Buy parking time remotely
  • Map of nearby meters
  • Parking space availability view
  • Automatic parking session alerts
  • "Where's my car" navigation
  • Concierge Autopay Program
Features
Read full description

Sentry Mobile is the first parking application that actually interacts with your parking meter in real time! Sentry Mobile lets you buy time on an MPS parking meter and the meter instantly updates to show you your remaining time with an icon indicating you paid with the smartphone app! You, as a parker, will see an easy-to-view map of nearby meters including visibility into actual current parking space availability. You can setup an MPS “stored value” Parker account and pay for parking at any MPS meter. The MPS mobile application allows you to make purchases on Legacy meters and in parking lots where municipalities permit this feature. You no longer have to carry coins or swipe credit cards to pay for parking! The Sentry Mobile application allows you to see your account balance at any time, and to replenish your account balance as needed. When you pay for your parking and pull into your parking space, the MPS Meter will automatically update with the amount of time you purchased and display a smart phone icon to indicate that your time was purchased via the Sentry Mobile application. No more “guessing” about whether your mobile payment was actually properly applied to your parking spot! You will receive automatic in-application alerts when your parking session time is running out, and you can see a quick summary of parking sessions you have purchased in the past. The “Where's my car” feature navigates you quickly back to your car. Concierge Autopay Program allows mobile parkers to automatically pay for parking without the need to interact directly with the parking meter or their mobile device.Payments will automatically be applied to your parking session from you MPS account. During your Concierge parking session you will not receive a violation as long as you do not exceed the maximum time allowed or park during “No Parking” hours. You will receive notifications and reminders during your parking session unless you disable them.

About

Red E Charge

Locate and navigate to nearby electric vehicle charging stations. Plan your journeys with real-time availability information and manage charging sessions and payments seamlessly. Supports a greener future with clean energy-powered stations.

Highlights
  • Locate nearest charging stations
  • Real-time station availability
  • Navigation to stations
  • Initiate charging sessions
  • Monitor charging progress
  • Manage payments
  • Clean energy powered stations
Features
Read full description

Welcome to the future of electric vehicle charging with RED E Charging! Our innovative app is your ultimate companion for effortless charging on the go. Whether you're cruising around town or embarking on a road trip, RED E Charging ensures that you're always powered up and ready to roll. With the RED E Charging app, you can easily locate and navigate to the nearest RED E charging station, ensuring that you never have to worry about being left stranded without a charge. Our extensive network of charging stations spans across cities, highways and scenic routes, offering convenience and peace of mind to electric vehicle drivers everywhere. Gone are the days of anxiously searching for a charging station or wondering if your EV will make it to your destination. RED E Charging app provides real-time information on the availability of charging stations, allowing you to plan your journey with confidence. Say goodbye to range anxiety and hello to seamless travel experiences. But that's not all – our app goes above and beyond to enhance your charging experience. With intuitive features and user-friendly interface, RED E Charging app makes it simple to initiate charging sessions, monitor progress and manage payments seamlessly. At RED E Charging, we're committed to sustainability and innovation. That's why our charging stations are powered by clean energy sources, helping to reduce carbon emissions and create a greener future for all. By choosing RED E Charging, you're not just charging your vehicle – you're making a positive impact on the environment. Join the electric revolution today with the RED E Charging app. Download now and experience the convenience, reliability and sustainability of electric vehicle charging like never before. With RED E Charging, the power is in your hands – literally!

Screenshots

Sentry Mobile4 screens
Red E Charge4 screens

Verdict

The call

The clearest difference is monetization model: Red E Charge at free against Sentry Mobile's free with in-app purchases. Red E Charge also leads on review sentiment (35% vs 25%). Sentry Mobile's advantage is rating (2.8 vs 2.6) and iOS requirement (12.0 vs 15.5). On price, ratings volume, update cadence and ads 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

Sentry Mobile holds the better App Store score, 2.8 against 2.6. Both are backed by a comparable volume of ratings — 112 and 85 respectively. Written reviews complicate that: 25% of Sentry Mobile's written reviews are positive against 35% of Red E Charge's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Sentry Mobile ships an update monthly, Red E Charge every 3 weeks. The most recent releases landed on October 23, 2026 and October 27, 2026 respectively.

Scorecard4 real differences · 6 level
Sentry Mobile versus Red E Charge: the parameters behind the verdict, then further details
ParameterSentry MobileRed E Charge
PriceFreeFree
Rating2.8 (112 ratings) — better2.6 (85 ratings)
Positive reviews24.6% of reviews34.8% of reviews — better
Number of ratings112 — better85
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.0 — better15.5
Further details — not scored
Size22 MB51 MB
Age rating4+4+
DeveloperMunicipal Parking ServicesRED E Charge LLC

Customer experience

Sentry Mobile

All ratings112 ratings
Positive44.6%
Neutral0.0%
Negative55.4%
Written reviews130 reviews
Positive24.6%
Neutral0.8%
Negative74.6%

Red E Charge

All ratings81 ratings
Positive37.0%
Neutral3.7%
Negative59.3%
Written reviews66 reviews
Positive34.8%
Neutral6.1%
Negative59.1%

User reviews

Sentry Mobile

From 112 App Store ratings

What we love

  • 🚀 Convenient auto pay feature
  • 👍 Easy to use
  • 👍 Seamless parking experience
  • 🚀 Intuitive app interface
  • 👍 Helpful concierge option

Room to improve

  • 🐛 Frequent app crashes
  • 🐛 Unreliable parking session tracking
  • 🐛 Inability to add/save credit cards
  • 🐛 Confusing user interface
  • 🐛 Inconsistent app functionality

Red E Charge

From 85 App Store ratings

What we love

  • 👍 Easy to use interface
  • 👍 Real human customer service
  • 👍 Competitive pricing
  • 👍 Fast charging speeds
  • 👍 Simple and lightweight app

Room to improve

  • 🐛 App glitches and freezes
  • 🐛 Registration issues
  • 🐛 Payment processing problems
  • 🐛 High authorization holds ($50)
  • 🐛 Lack of pricing information

Bugs and requests

Sentry Mobile

Reported bugs

5 issues
  • App fails to recognize active parking sessions
  • Inability to extend parking time through the app
  • App crashes when trying to add payment information
  • Parking spots not displayed accurately in the app
  • Inconsistent behavior when trying to pay for parking

Requested features

5 requests
  • Allow saving credit card information
  • Improve app stability and reliability
  • Enhance user interface and navigation
  • Provide better parking session management
  • Integrate with more payment options (e.g., Apple Pay)

Red E Charge

Reported bugs

28 issues
  • App forces number '1' in phone field
  • Scan feature hard to find
  • Charging session screen doesn't update
  • Search function does not work
  • App won't let users accept terms and conditions
Show 23 more
  • Verify button not accessible after OTP
  • Phone number field automatically adds '1'
  • QR reader location requires map to be open
  • App takes info but doesn't interact with chargers
  • App glitches saying 'plug car in' prematurely
  • Credit card information needs re-entry on webpage
  • Search function zooms to wrong city/state
  • App freezes or crashes
  • Login issues after profile creation
  • Payment card keeps failing
  • App frozen for days
  • Charger failed to sync protocols
  • Frequent disconnects charging session
  • Cannot login with correct credentials
  • Account not found when trying to change password
  • Registration error 'too_short'
  • App says something went wrong when accepting terms
  • App doesn't connect to chargers
  • App skips landing screen
  • App disconnects from network mid-charge
  • Chargers frequently in error state or under repair
  • App kicks user out to login screen
  • Cannot enter credit card number due to UI overlay

Requested features

8 requests
  • Add filters for charger types (L2/DC Fast)
  • Implement roaming agreements with other apps
  • Allow storing credit card information
  • Add Apple Pay integration
  • Display pricing information before charging
Show 3 more
  • Improve UI for mobile devices (keypad issue)
  • Add route planner functionality
  • Improve charger status and charge check functionality

In-app purchases

None

Sentry Mobile

No in-app purchases

None

Red E Charge

No in-app purchases

Questions

Is Sentry Mobile free?
Sentry Mobile is free to download, with no in-app purchases.
Is Red E Charge free?
Red E Charge is free to download, with no in-app purchases.
Which has better reviews, Sentry Mobile or Red E Charge?
Sentry Mobile is rated higher. Sentry Mobile averages 2.8 out of 5 from 112 ratings, while Red E Charge averages 2.6 from 85 ratings.
Do Sentry Mobile or Red E Charge have ads?
Neither Sentry Mobile nor Red E Charge shows ads.
Which is updated more often, Sentry Mobile or Red E Charge?
Sentry Mobile ships an update monthly, and Red E Charge every 3 weeks. Most recently, Sentry Mobile was updated on October 23, 2026 and Red E Charge on October 27, 2026.

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