DoubleGlazingApp vs Zap Panels
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
DoubleGlazingApp
Easily measure and price new double glazing units at your own pace. Features an assistive measuring tool and allows direct submission of measurements to installers for the next stage of your inquiry.
- Measure double glazing units
- Price double glazing units
- Assistive measuring device
- Submit measurements to installers
- Professional assistance button
Read full descriptionHide full description
DoubleGlazingApp is the latest and easiest way to price your new double glazing units. You can measure and price at your own pace and if you need help from the professionals you can use the inbuilt assistance button. The app includes an assistive measuring device which helps with the measuring when you donβt have a tape measure to hand. Once you have measured the units you require, you can submit these directly to the installer who will help you with the next stage of your enquiry.
Zap Panels
Read full descriptionHide full description
Zap Panels gives your Tesla Powerwall a simple, stylish, dedicated in-home display. A real-time dashboard showing exactly what your home energy system is doing right now. Ideal for wall or desk mounted displays. Monitor live power readings across solar generation, home consumption, battery charge and grid import/export. The home consumption breakdown shows exactly where your energy is coming from at any moment. Daily kWh totals, tariff cost tracking and a personalised solar generation forecast give you the full picture of your energy use. Octopus Agile customers can view live half-hourly import rates directly on the dashboard, updated automatically throughout the day. Intelligent Octopus Go users can view current tariff status, peak/off-peak and upcoming dispatch slots. Features β’ Live solar, home, battery and grid power readings β’ Home consumption breakdown by source: solar, battery and grid β’ Octopus Agile half-hourly import rates β’ Intelligent Octopus Go slots and rates β’ Daily kWh totals for all energy flows β’ Tariff cost tracking: import costs, export earnings and net daily spend β’ Solar generation forecast, auto-calibrated to your real system over time β’ Weather forecast β’ Full screen and landscape view for a dedicated energy display β’ Dark mode and light mode β’ Panel drag-to-reorder β’ Configurable poll speed, font size and display settings β’ Keep screen on mode for always-on display β’ Screen dimming scheduler β’ In-day charts β’ Historical charts with comparison tool β’ Data export β’ 14-day free trial, no subscription, one-time purchase to unlock premium features Not affiliated with or endorsed by Tesla, Inc. or Octopus Energy Ltd. Requires a Tesla Energy account.
Screenshots
Verdict
The clearest difference is in-app purchases: DoubleGlazingApp at none against Zap Panels's 1. DoubleGlazingApp also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads 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
Both are free to download. Zap Panels sells 1 one-off in-app purchase. DoubleGlazingApp asks for nothing beyond the download.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 2, 2026 and October 24, 2026 respectively.
| Parameter | DoubleGlazingApp | Zap Panels |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | β |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Monetization | Free | β |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 β better | 17.0 |
| Further details β not scored | ||
| Size | 9 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Infonote | William Lee |
In-app purchases
DoubleGlazingApp
No in-app purchases
Zap Panels
- Zap Panels Premium$4.99
Questions
Is DoubleGlazingApp free?
Is Zap Panels free?
Do DoubleGlazingApp or Zap Panels have ads?
Which is updated more often, DoubleGlazingApp or Zap Panels?
Other comparisons















