VRM vs JSON Complication
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Remote energy system monitoring
- Real-time solar, battery, and power tracking
- Instant alert notifications
- Performance optimization
- Smartphone control
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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.
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.
- Custom JSON feed display
- Multiple named feeds
- Configurable JSON key paths
- Support for various data types (numbers, text)
- Unit conversion
- Customizable complication colors
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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
Verdict
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
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.
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.
| Parameter | VRM | JSON Complication |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (56 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 39.5% of reviews | — |
| Number of ratings | 56 — better | 1 |
| Update frequency | Fortnightly | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, Apple Watch |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 75 MB | 3 MB |
| Age rating | 4+ | 17+ |
| Developer | Victron Energy | Aviad Offer |
Customer experience
VRM
JSON Complication
In-app purchases
VRM
No in-app purchases
JSON Complication
- Live Feeds Annual$0.991 Year









