Comparison

VRM vs JSON Complication

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

Head to head
About

VRM

Monitor and manage your energy systems remotely. Track solar, battery, and power usage in real time, receive alerts, and optimize performance from your smartphone. Ideal for off-grid, marine, or backup power solutions.

Highlights
  • Remote energy system monitoring
  • Real-time solar, battery, and power tracking
  • Instant alert notifications
  • Performance optimization
  • Smartphone control
Features
Read full description

Stay in control of your energy system anytime, anywhere with the Victron VRM app! Remotely monitor your solar, battery, and power usage in real time, receive instant alerts, and optimize performance—all from your smartphone. Whether you’re off-grid, on a boat, or managing a backup power system, VRM keeps you connected. Download now and take charge of your energy! This app requires your system to be connected to the internet through a Victron Global Remote, Victron Ethernet Remote or Color Control GX / Venus GX.

About

JSON Complication

Display custom data from JSON feeds directly on your Apple Watch complications. Configure multiple feeds with URL and key paths to show various metrics like power, temperature, or text. Customize display and colors for a personalized watch face.

Highlights
  • Custom JSON feed display
  • Multiple named feeds
  • Configurable JSON key paths
  • Support for various data types (numbers, text)
  • Unit conversion
  • Customizable complication colors
Features
Read full description

Bring values from your own JSON feeds to your wrist. Configure up to four named feeds with a URL and JSON key path, then choose a feed for each compatible corner, circular, inline, or rectangular complication on Apple Watch. Display power, temperature, distance, speed, weight, pressure, energy, percentages, numbers, or text. Convert supported units, choose up to four display characters, and customize supported complication rings with fixed or threshold-based colors. Live feeds on iPhone are free. Live readings on Apple Watch and its complications require the Live Feeds Annual auto-renewable subscription. The subscription lasts one year; the localized price is shown before purchase. It renews automatically unless canceled. Restore purchases or manage your subscription from the app. Apple controls complication refresh timing; your selected app interval does not guarantee the same watch-face refresh frequency. Private network feeds require a connection to that network. HTTP and HTTPS are supported. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

VRM4 screens
JSON Complication2 screens

Verdict

The call

The clearest difference is rating: JSON Complication at 5.0 against VRM's 3.4. VRM's advantage is in-app purchases (none vs 1) and ratings volume (56 vs 1). On price, ads, device support and iOS requirement 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. JSON Complication sells 1 in-app purchase, starting at $0.99 per year. VRM asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

JSON Complication holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: VRM has 56 ratings behind it against 1, so its average is the more settled of the two.

Scorecard4 real differences · 6 level
VRM versus JSON Complication: the parameters behind the verdict, then further details
ParameterVRMJSON Complication
PriceFreeFree
Rating3.4 (56 ratings)5.0 (1 ratings) — better
Positive reviews39.5% of reviews—
Number of ratings56 — better1
Update frequencyFortnightly—
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, Apple Watch — betteriPhone, Apple Watch
Requires iOS17.017.0
Further details — not scored
Size75 MB3 MB
Age rating4+17+
DeveloperVictron EnergyAviad Offer

Customer experience

VRM

All ratings56 ratings
Positive60.7%
Neutral7.1%
Negative32.1%
Written reviews86 reviews
Positive39.5%
Neutral18.6%
Negative41.9%

JSON Complication

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

VRM

No in-app purchases

1 purchases

JSON Complication

Subscriptions1
  • Live Feeds Annual$0.991 Year

Questions

Is VRM free?
VRM is free to download, with no in-app purchases.
Is JSON Complication free?
JSON Complication is free to download, with in-app purchases available.
Which has better reviews, VRM or JSON Complication?
JSON Complication is rated higher. VRM averages 3.4 out of 5 from 56 ratings, while JSON Complication averages 5.0 from 1 ratings.
Do VRM or JSON Complication have ads?
Neither VRM nor JSON Complication shows ads.

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