Comparison

Netzero for Powerwall vs GMVoice

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

Head to head
About

Netzero for Powerwall

Automate your home energy system to maximize savings and monitor your Powerwall's health. Integrate with utility providers for dynamic pricing and receive alerts for solar or battery issues. Gain insights into energy production and use your device as a home energy dashboard.

Highlights
  • Powerwall automation and scheduling
  • Utility tariff integration
  • Solar production monitoring
  • Powerwall health alerts
  • Home energy dashboard
  • Advanced diagnostics
Features
Read full description

Increase savings with Powerwall automation and utility integrations. Connect your energy devices, monitor Powerwall health, and detect solar issues early. Advanced features require a subscription after a 30-day free trial. - Take charge of your Powerwall. Schedule charging, discharging, and backup settings. Export stored energy to the grid when export prices are highest, or before a period of cheap or free electricity. Prevent unnecessary discharge during EV charging and improve efficiency. Automate your home energy with device integrations. - Connect your EV charger, EV, and heating/cooling devices. Pre-heat or pre-cool your home when electricity is cheap, or pause EV charging and heating/cooling during outages. Supports 500+ devices across 50+ brands. - Octopus Energy users benefit from automatic Powerwall charging during Intelligent Octopus Go sessions. Supports Agile Octopus, Tibber, Amber Electric, ComEd Hourly Pricing, and Ameren Power Smart Pricing. Netzero configures Powerwall with live pricing to help cut your bills. - Receive automatic alerts for solar or battery issues. Track Powerwall capacity and degradation to stay within warranty limits. - Get daily, monthly, and yearly production estimates. Spot solar performance issues early. Use the app on your tablet or phone as an always-on home energy dashboard. - Download detailed data, view string-level solar performance, access weather data and developer tools, and enjoy ongoing feature updates. Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

GMVoice

Control your Gym Monster workout device using voice commands in multiple languages. Start/stop exercises, adjust weights, and stay focused hands-free. Offers demo mode and Siri shortcuts for seamless integration.

Highlights
  • Hands-free workout control
  • Multi-language voice commands
  • Weight adjustment via voice
  • Demo mode for testing
  • Siri Shortcuts integration
  • On-device speech recognition
Features
Read full description

GMVoice lets you control Gym Monster with simple English voice commands. Use GMVoice to start or stop actions hands-free, adjust weight, and stay focused on your workout without reaching for buttons between sets. Key features: - English/Spanish/Italian/French/German/Czech voice commands for core workout actions - Use your WiFi or specialized dongle to connect to your Gym Monster. Choice is yours - Demo Mode for testing the app flow without external hardware - On-device speech recognition - Voice-triggered controls for supported workout scenarios - Siri Shortcuts available How it works: - Connect by using WiFi network or use GMVoice Dongle (get it at www.GMVoice.tech) to your Gym Monster - Connect GMVoice to your Gym Monster - Allow microphone and speech recognition access - Start voice control and speak the wake phrase followed by a command Demo Mode: - You can try the main voice control flow without connecting external hardware - Demo Mode is also available for App Review Important: - GMVoice is designed for Gym Monster 1, Gym Monster 2 and Gym Monster 2s - Gym Monster is required for live command delivery outside Demo Mode

Screenshots

Netzero for Powerwall4 screens
GMVoice4 screens

Verdict

The call

The clearest difference is in-app purchases: GMVoice at none against Netzero for Powerwall's 2. GMVoice also leads on rating (5.0 vs 4.8) and review sentiment (100% vs 90%). Netzero for Powerwall's advantage is ratings volume (791 vs 6). On price, 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

Both are free to download. Netzero for Powerwall sells 2 in-app purchases, starting at $6.99 per month. GMVoice asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

GMVoice holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Netzero for Powerwall has 791 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 90% of Netzero for Powerwall's written reviews are positive against 100% of GMVoice's.

UpkeepUpdate frequency

Netzero for Powerwall ships an update weekly, GMVoice every 5 days. The most recent releases landed on October 18, 2026 and October 16, 2026 respectively.

Scorecard5 real differences · 5 level
Netzero for Powerwall versus GMVoice: the parameters behind the verdict, then further details
ParameterNetzero for PowerwallGMVoice
PriceFreeFree
Rating4.8 (791 ratings)5.0 (6 ratings) — better
Positive reviews90.4% of reviews100.0% of reviews — better
Number of ratings791 — better6
Update frequencyWeeklyEvery 5 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.416.0 — better
Further details — not scored
Size60 MB117 MB
Age rating4+4+
DeveloperNetzero Labs, IncLuzana.App

Customer experience

Netzero for Powerwall

All ratings791 ratings
Positive94.9%
Neutral1.6%
Negative3.4%
Written reviews563 reviews
Positive90.4%
Neutral2.8%
Negative6.7%

GMVoice

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Netzero for Powerwall

Reported bugs

2 issues
  • May not be compatible with PW3
  • Diagnostic screen stays black

Requested features

2 requests
  • stop battery charging?
  • AND function on the conditionality

GMVoice

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Netzero for Powerwall

Subscriptions2
  • Netzero Pro - Monthly$6.991 Month
  • Netzero Pro - Annual$69.991 Year
None

GMVoice

No in-app purchases

Questions

Is Netzero for Powerwall free?
Netzero for Powerwall is free to download, with in-app purchases available.
Is GMVoice free?
GMVoice is free to download, with no in-app purchases.
Which has better reviews, Netzero for Powerwall or GMVoice?
GMVoice is rated higher. Netzero for Powerwall averages 4.8 out of 5 from 791 ratings, while GMVoice averages 5.0 from 6 ratings.
Do Netzero for Powerwall or GMVoice have ads?
Neither Netzero for Powerwall nor GMVoice shows ads.
Which is updated more often, Netzero for Powerwall or GMVoice?
Netzero for Powerwall ships an update weekly, and GMVoice every 5 days. Most recently, Netzero for Powerwall was updated on October 18, 2026 and GMVoice on October 16, 2026.

Other comparisons