Comparison

Energy Meter vs M2M Data Controller

Price, ratings, monetisation and update history for both apps, side by side β€” 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
Read full description

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

M2M Data Controller

Features
Read full description

With M2M Data Controller app you can stay connected and manage your sims at your finger tips.

Screenshots

Energy Meter4 screens
M2M Data Controller4 screens

Verdict

The call

The clearest difference is price: M2M Data Controller at Free against Energy Meter's $3.99. M2M Data Controller also leads on iOS requirement (11.0 vs 15.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

M2M Data Controller 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, M2M Data Controller every 3 months. The most recent releases landed on October 12, 2026 and October 4, 2026 respectively.

Scorecard2 real differences Β· 6 level
Energy Meter versus M2M Data Controller: the parameters behind the verdict, then further details
ParameterEnergy MeterM2M Data Controller
Price$3.99Free β€” better
Positive reviews86.3% of reviewsβ€”
Update frequencyEvery 6 monthsEvery 3 months β€” better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidβ€”
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.011.0 β€” better
Further details β€” not scored
Size7 MB71 MB
Age rating4+4+
DeveloperHeiko PruessingM2M DATA GROUP LIMITED

In-app purchases

None

Energy Meter

No in-app purchases

None

M2M Data Controller

No in-app purchases

Questions

Is Energy Meter free?
Energy Meter costs $3.99, with no in-app purchases.
Is M2M Data Controller free?
M2M Data Controller is free to download, with no in-app purchases.
Do Energy Meter or M2M Data Controller have ads?
Neither Energy Meter nor M2M Data Controller shows ads.
Which is updated more often, Energy Meter or M2M Data Controller?
Energy Meter ships an update every 6 months, and M2M Data Controller every 3 months. Most recently, Energy Meter was updated on October 12, 2026 and M2M Data Controller on October 4, 2026.

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