Comparison

Energy Meter vs Rectangle Detection

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

Head to head
About

Energy Meter

Monitor your SMA solar plant and identify energy wasters with real-time data. Connect locally to your PV system for instant insights into power grid performance and individual device readings.

Highlights
  • Monitor SMA Energy Meter real-time data
  • Supports SMA inverters via MODBUS
  • Automatic local network device detection
  • Energy flow display
  • Consumption measurement
  • Individual phase view
  • Collect values into charts
Features
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Monitor and discover real-time data of your SMA solar photovoltaic plant or locate secret power wasters in your home. Individual SMA sensors or inverters can be examined directly (see below list of supported devices). The app communicates locally with the solar system without a cloud. This means that real-time measured data are available at lightning speed and changes of power values are detected immediately. Discover and explore your photovoltaic system and keep track of your power grid! Connect your iPhone or iPad to the same network (WiFi) as your PV plant and get a deep insight of your power grid. The app works best with self-consumption plants (plants with Sunny Home Manager devices). The focus of the app is to monitor real-time data values. Long-term recordings are currently not possible (apart from the grid consumption measurements). ** Features ** * Monitor SMA Energy Meter real-time data * Supports SMA inverters (via MODBUS protocol only!) * Automatically finds and detects SMA devices and sensors on the local network * Energy flow display of your solar plant (self-consumption plant) at the grid connection point * Measurement of consumption values (grid consumption measurement) * Separate view of individual phases (L1, L2, L3) via Energy Meter sensors * Collecting values into charts * Detailed measured value view for each individual SMA device/sensor * Use the app to detect und jump onto the web interface of the inverter device ** Supported SMA Sensors and Inverters ** * SMA Energy Meter 1.0 + 2.0 (via Speedwire protocol) * SMA Sunny Home Manager 2.0 (supports only the build-in Energy Meter!) * SMA Sunny Boy Storage 3.7, 3.8, 5.0, 6.0 (via MODBUS) * SMA Sunny Island Storage 3.0, 4.4, 6.0, 8.0 (via MODBUS) * SMA Sunny Tripower 8.0 - 10.0 (via MODBUS) * SMA Sunny Tripower Smart Energy (Hybrid, via MODBUS) ** NOT supported devices ** * SMA Sunny Home Manager 1.0 (HM-10) Hint: Manual activation of the MODBUS protocol is required for communication with SMA inverters in the device settings. For this you need installer rights of your inverters! We are looking forward to your feedback or questions to feedback@heiko-pruessing.de! P.S.: If you like this app, please support us with a short review in the App Store or write us via App contact from within the app! SMA and Sunny Boy are registered Trademarks of SMA Solar Technology AG. Modbus is a registered Trademark of SCHNEIDER ELECTRIC USA, INC.

About

Rectangle Detection

Features
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Find rectangular regions in images. *Parameters that can be set for detection ・minimum Confidence: Confidence of detection results (0-1) ・minimum AspectRatio: Minimum aspect ratio of the rectangle to be detected (shorter dimension divided by longer dimension) (0-1) ・maximum AspectRatio: Maximum aspect ratio of the rectangle to be detected (shorter dimension divided by longer dimension) (0-1) ・quadratureTolerance: Tolerance angle for the corners of the rectangle to deviate from 90° (0-45) ・minimum Size: Ratio of size to the input image (0-1) ・maximum number of Rectangle : Maximum number of Rectangle(1-30)

Screenshots

Energy Meter4 screens
Rectangle Detection1 screens

Verdict

The call

The clearest difference is price: Rectangle Detection at Free against Energy Meter's $3.99. Rectangle Detection also leads on update cadence (fortnightly vs every 6 months). Energy Meter's advantage is ads (none vs shown) and device support (3 vs 1). On in-app purchases 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

Rectangle Detection is free to download; Energy Meter costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Energy Meter ships an update every 6 months, Rectangle Detection fortnightly. The most recent releases landed on October 12, 2026 and September 27, 2026 respectively.

Scorecard5 real differences · 3 level
Energy Meter versus Rectangle Detection: the parameters behind the verdict, then further details
ParameterEnergy MeterRectangle Detection
Price$3.99Free — better
Positive reviews86.3% of reviews—
Update frequencyEvery 6 monthsFortnightly — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.7.2
Further details — not scored
Size7 MB36 MB
Age rating4+4+
DeveloperHeiko PruessingHideaki Uchikoshi

In-app purchases

None

Energy Meter

No in-app purchases

None

Rectangle Detection

No in-app purchases

Questions

Is Energy Meter free?
Energy Meter costs $3.99, with no in-app purchases.
Is Rectangle Detection free?
Rectangle Detection is free to download, with no in-app purchases.
Do Energy Meter or Rectangle Detection have ads?
Rectangle Detection shows ads; Energy Meter does not.
Which is updated more often, Energy Meter or Rectangle Detection?
Energy Meter ships an update every 6 months, and Rectangle Detection fortnightly. Most recently, Energy Meter was updated on October 12, 2026 and Rectangle Detection on September 27, 2026.

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