Comparison

SpeakerPro vs EV Notifier

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

Head to head
About

SpeakerPro

Precisely measure speaker distances and toe-in angles using your iPhone or iPad. Ideal for audio enthusiasts and professionals, this app offers intuitive guidance for optimizing your sound system's layout. It works offline and provides accurate measurements within fractions of an inch.

Highlights
  • Precise speaker distance measurement
  • Intelligent toe-in angle recommendations
  • Works offline
  • Accurate to fractions of an inch
  • Automatic reference calibration
  • Projects automatically saved
Features
Read full description

SpeakerPro is the first app that allows you to precisely measure speaker distances and toe-in angles with your iPhone, iPad, or iPod Touch. Ideal for audio enthusiasts, home recordists, and professionals alike, SpeakerPro works with any stereo or surround sound system, and with any make or model of speaker. It employs groundbreaking patented technology that enables you to get the most out of your audio system. Key Features: • Use your iPhone, iPad, or iPod Touch for precise measurement and adjustment of critical speaker-to-listening position and speaker-to-speaker distances. • Easy and intuitive to use. • Intelligently recommends speaker toe-in angles for your particular system's layout with color coding and continuously updated onscreen icons. • Works anywhere -- no need for WiFi or Internet connection. • Distance measurements are accurate within fractions of an inch. • Table view shows multiple distance measurements, which can be printed or shared. • Reference calibration automatically compensates for latency (delay) in the signal path of the audio system. • Projects are automatically saved and can be renamed and recalled. • Includes user guide that can be printed or shared. (Note: Distance measurement requires an appropriate audio cable to connect your device's headphone jack to the inputs of your speaker system.) Measuring speaker distances and angles with SpeakerPro is easy. Begin by using an appropriate audio cable to connect the headphone output of your device to individual speakers or to your audio system. After taking a simple reference calibration, select the speaker you want to use as the starting point by touching its onscreen icon. Then place your device at the listening position (or next to another speaker) and touch its corresponding onscreen icon. SpeakerPro instantly displays the precise distance between the two points. You can choose to accept it, or to move the speaker and re-measure. Repeat the process as necessary to take distance measurements from other speakers in your system. Once all your measurements are taken, touch the Angle icon to obtain intelligent speaker toe-in angle recommendations for your system. Begin by adjusting your speakers so they are facing straight ahead. Place your iPhone, iPad, or iPod Touch on top of one of the speakers and press the corresponding onscreen icon, then rotate that speaker towards the listening position. As you do so, SpeakerPro's onscreen display shows you the degree of toe-in, using color coding to guide you through a range of recommended angles. Next, do the same for the paired speaker in your system. A handy onscreen Reset button allows you to start from scratch at any time and experiment with different distance measurements and toe-in angles.

About

EV Notifier

This app helps electric vehicle owners find available charging stations from various providers. It sends notifications when a charger becomes free, eliminating the need to check multiple apps. Users can view station details, filter by plug type or network, and manage all their alerts in one place.

Highlights
  • Check charger availability from multiple providers
  • Receive notifications when chargers become available
  • Explore map or search for chargers
  • View charger details and availability
  • Filter by plug type and charging network
  • Manage notifications in one place
Features
Read full description

EV Notifier allows you to check charger availability from multiple providers and receive a notification when charging stations become available. Avoid loading multiple apps and refreshing constantly just to know when a charging station is available. Explore the map or search your area for an EV charger from compatible networks. Select a location to see charger details and availability. Use map filters to only show certain charging plugs and/or charging networks. Set up notifications for different charging stations and manage them in one place. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

SpeakerPro4 screens
EV Notifier4 screens

Verdict

The call

The clearest difference is review sentiment: EV Notifier at 100% against SpeakerPro's 0%. EV Notifier also leads on price (Free vs $2.99) and rating (5.0 vs 1.0). SpeakerPro's advantage is in-app purchases (none vs 2) and iOS requirement (7.0 vs 16.4). On ratings volume, update cadence, ads and device support 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

EV Notifier is free to download; SpeakerPro costs $2.99 up front. EV Notifier sells 2 in-app purchases, starting at $3.00 per month. SpeakerPro asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

EV Notifier holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 4 and 4 respectively. Written reviews point the same way: 0% of SpeakerPro's written reviews are positive against 100% of EV Notifier's.

UpkeepUpdate frequency

SpeakerPro ships an update every 3 months, EV Notifier every 2 months. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

Scorecard6 real differences · 4 level
SpeakerPro versus EV Notifier: the parameters behind the verdict, then further details
ParameterSpeakerProEV Notifier
Price$2.99Free — better
Rating1.0 (4 ratings)5.0 (4 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings44
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS7.0 — better16.4
Further details — not scored
Size4 MB60 MB
Age rating4+4+
DeveloperAudioAppsStoreWatta Labs

Customer experience

SpeakerPro

All ratings4 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews6 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

EV Notifier

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

SpeakerPro

No in-app purchases

2 purchases

EV Notifier

Subscriptions2
  • Pro Monthly$3.001 Month
  • Pro Yearly$30.001 Year

Questions

Is SpeakerPro free?
SpeakerPro costs $2.99, with no in-app purchases.
Is EV Notifier free?
EV Notifier is free to download, with in-app purchases available.
Which has better reviews, SpeakerPro or EV Notifier?
EV Notifier is rated higher. SpeakerPro averages 1.0 out of 5 from 4 ratings, while EV Notifier averages 5.0 from 4 ratings.
Do SpeakerPro or EV Notifier have ads?
Neither SpeakerPro nor EV Notifier shows ads.
Which is updated more often, SpeakerPro or EV Notifier?
SpeakerPro ships an update every 3 months, and EV Notifier every 2 months. Most recently, SpeakerPro was updated on October 7, 2026 and EV Notifier on October 1, 2026.

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