Comparison

AmpWidgets vs Sunster

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

Head to head
About

AmpWidgets

Monitor your Victron energy system in real-time with customizable widgets for your iPhone, iPad, Mac, and Apple Watch. View battery status, solar production, and more without opening the main app.

Highlights
  • Real-time battery and solar monitoring
  • Home Screen, Lock Screen, and StandBy widgets
  • macOS desktop and Notification Center widgets
  • Apple Watch complications
  • Customizable metric display
  • Light, Dark, and Auto appearance modes
  • Background data refresh
Features
Read full description

Never miss a thing with your Victron system. AmpWidgets brings powerful battery, solar, tank, sensor, and system monitoring to every screen you own. Check your most important Victron VRM data on your iPhone, iPad, Mac, and Apple Watch — without constantly opening the VRM app. WIDGETS EVERYWHERE • Home Screen widgets for quick system checks • Lock Screen widgets for instant battery and solar metrics • StandBy support for an always-visible display • macOS desktop and Notification Center widgets • Apple Watch complications for glanceable updates on your wrist • A resizable widget that shows one, three, or six metrics at a time SMART ALERTS Create custom rules for the moments that matter: • Battery below your chosen percentage • Current rising above or falling below a threshold • System or battery state changes • Any value that needs your attention AmpWidgets checks your rules automatically in the background and notifies you the moment something changes — with smart cooldowns so you're never spammed. COMPLETE VICTRON MONITORING See more of your system than ever before: • Battery state of charge, voltage, current, and power • Individual cell voltage highs and lows, plus pack balance for lithium banks • Consumed amp-hours and time-to-go • Solar power output, PV voltage, and today's / yesterday's yield • Charge cycles, charged and discharged energy, min/max voltage • Battery temperature, health details, and starter-battery data • Per-device readings for every shunt, BMS, and charger • System status and alarm summaries TANKS, SENSORS & SYSTEM STATES AmpWidgets supports more Victron data than ever, including: • Fresh, grey, fuel, and gas/LPG tank levels — with a combined level per fluid type • Distinct icons so water and gas tanks are instantly recognizable • Temperature, humidity, and pressure sensors, shown by their real device names • Shore- and generator-power detection via AC input voltage • AC input and output, DC loads, and EV charger data • System, battery, inverter, charger, and solar-charger states CUSTOMIZABLE TO YOUR NEEDS Build the monitoring setup that works for you: • Choose exactly which metrics to display • Use simple widgets for a single value, or expand them to show more • Set Light, Dark, or Auto appearance independently for each widget • Rename your devices so they make sense to you • View solar production trend charts • Switch between multiple installations from the dashboard • Try everything instantly with built-in Demo Mode — no account needed APPLE WATCH SUPPORT Keep your Victron system on your wrist: • View battery, solar, tank, and temperature data directly on Apple Watch • Add complications from the watch face gallery • Reliable independent background updates BUILT FOR OFF-GRID LIVING Whether you're in an RV, on a boat, at a cabin, or running a mobile power setup, AmpWidgets helps you stay informed without constantly checking your system manually. See at a glance if your batteries are charging, how much solar you're producing, whether your tanks need attention, and the instant something important changes. WORKS WITH YOUR VRM ACCOUNT AmpWidgets connects directly to your Victron VRM installation. Just enter your Installation ID and API token from vrm.victronenergy.com and you're ready to go. One app, every screen. Download AmpWidgets and take control of your power monitoring.

About

Sunster

Control your RV's parking air conditioning and heater remotely from your mobile device. Manage multiple devices with customizable scenes and receive real-time safety notifications for peace of mind.

Highlights
  • Remote climate control
  • Multi-device compatibility
  • Customizable scene control
  • Real-time safety notifications
  • Encrypted data transmission
  • Dual-factor authentication
Read full description

Remote Smart Control No matter where you are, simply open the mobile app to remotely turn on/off and adjust the parking air conditioning temperature, control the heater operating mode, and say goodbye to extreme cold and heat by creating a comfortable environment in your RV. Multi-Device Compatibility Management Supports one-click connection with multiple devices, centralized management of heater devices, and customizable scene-based control schemes to simplify complex operations. Unworrying Safety Protection Real-time push notifications for device anomalies (such as overheating or power loss), supports remote forced shutdown; encrypted data transmission + dual-factor authentication, safeguarding your privacy and device security.

Screenshots

AmpWidgets4 screens
Sunster4 screens

Verdict

The call

The clearest difference is price: Sunster at Free against AmpWidgets's $0.99. Sunster also leads on ratings volume (3 vs 1) and iOS requirement (13.0 vs 18.4). AmpWidgets's advantage is rating (5.0 vs 3.7) and review sentiment (67% vs 50%). On update cadence, ads, in-app purchases 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

Sunster is free to download; AmpWidgets costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

AmpWidgets holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews point the same way: 67% of AmpWidgets's written reviews are positive against 50% of Sunster's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on September 11, 2026 and September 6, 2026 respectively.

Scorecard6 real differences · 4 level
AmpWidgets versus Sunster: the parameters behind the verdict, then further details
ParameterAmpWidgetsSunster
Price$0.99Free — better
Rating5.0 (1 ratings) — better3.7 (3 ratings)
Positive reviews66.7% of reviews — better50.0% of reviews
Number of ratings13 — better
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPad, iPod
Requires iOS18.413.0 — better
Further details — not scored
Size12 MB58 MB
Age rating4+17+
DeveloperNorthbound House LLC江苏百易德电子科技有限公司

Customer experience

AmpWidgets

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Sunster

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

AmpWidgets

No in-app purchases

None

Sunster

No in-app purchases

Questions

Is AmpWidgets free?
AmpWidgets costs $0.99, with no in-app purchases.
Is Sunster free?
Sunster is free to download, with no in-app purchases.
Which has better reviews, AmpWidgets or Sunster?
AmpWidgets is rated higher. AmpWidgets averages 5.0 out of 5 from 1 ratings, while Sunster averages 3.7 from 3 ratings.
Do AmpWidgets or Sunster have ads?
Neither AmpWidgets nor Sunster shows ads.
Which is updated more often, AmpWidgets or Sunster?
AmpWidgets ships an update every 2 weeks, and Sunster every 2 weeks. Most recently, AmpWidgets was updated on September 11, 2026 and Sunster on September 6, 2026.

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